CN110442888A - A kind of suspension sledge vehicle and design method - Google Patents
A kind of suspension sledge vehicle and design method Download PDFInfo
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- CN110442888A CN110442888A CN201810414012.7A CN201810414012A CN110442888A CN 110442888 A CN110442888 A CN 110442888A CN 201810414012 A CN201810414012 A CN 201810414012A CN 110442888 A CN110442888 A CN 110442888A
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Abstract
The present invention proposes a kind of suspension sledge vehicle and design method, by original shape design, numerical simulation, the aerodynamic moment judgement of suspension sledge vehicle, lift judgement, aerodynamic drag judgement, the amendment of suspension sledge vehicle shape and etc. realization.The present invention is designed using special suspension sledge vehicle, by being arranged to design procedure is comprehensive, reduces the design cycle, the suspension sledge vehicle after making design can satisfy test requirements document, avoid causing test that can not carry out due to sledge vehicle, thus design iterations experimental rig.
Description
Technical field
The present invention relates to a kind of suspension sledge vehicle and design methods, belong to high-speed test (HST) engineering device technique field.
Background technique
Currently, Rocket sled test track mostly uses greatly sliding block-orbit form both at home and abroad, the contact using sliding block with track,
Realize sledge vehicle and the support of mission payload thereon, sledge vehicle is under the action of power, high speed slide in orbit, realize to sledge vehicle and
The acceleration of mission payload.Since sledge vehicle is run in high ski-running near the ground, with the increase of running speed, pneumatic load that sledge vehicle is born
Lotus is also bigger, simultaneously because the nearly rail high speed traveling of sledge traffic allowance, so that sledge vehicle generates apparent ground effect, so that sledge vehicle
It generates compared with lift, can occur to hit the serious of even derailing with track when sledge vehicle lift is greater than gravity, at present generally to sledge
Vehicle sliding block is limited, it is made along rail running, to avoid the generation of derailment occurring in a certain range.
Invention ZL200610114636.4 " ground surface high speed super-conductive magnetic suspension prizing body experimental rig " proposes a kind of suspension sled
Body experimental rig does not refer to specifically how designing wherein proposing the prizing body configuration design using streaming to reduce aerodynamic loading,
And streaming shape is the conventional design of high-speed moving object, design method has directly the safety of design cycle and experimental rig
Connect influence.For realizing the novel sledge vehicle of carrying using magnetic suspension, since the support stiffness coefficient of levitation device is less than rail
Support stiffness coefficient, it is difficult to be limited, and levitation gap increases the influence of pneumatic action, it would be highly desirable to solve sledge vehicle airload
It is influenced caused by sledge vehicle stability, realizes the stable traveling of the high speed of sledge vehicle.
Summary of the invention
It is an object of the invention to overcome the shortage of prior art, provide it is a kind of can reduce design cost, improve test safety
Property the suspension sledge vehicle and design method suitable for suspension test device, be effectively reduced sledge vehicle airload, improve experimental rig
Stability.
Technical solution of the invention: a kind of design method of suspension sledge vehicle is realized by following steps:
The first step designs the original shape of suspension sledge vehicle；
(the length, width and height key dimension of suspension sledge vehicle) is constrained according to the design size of suspension sledge vehicle, designs the first of suspension sledge vehicle
The design size constraint of beginning shape, suspension sledge vehicle is determined according to the suspension system of suspension test.The original shape one of suspension sledge vehicle
As use pointed cone streamlined, the high-speed moving objects configuration designs such as existing rocket sled can be used in specific design.
Second step, using numerical value emulation method, suspension sledge vehicle is pneumatic under development complete test velocity envolop, multimode parameter
Specificity analysis obtains suspension sledge vehicle aerodynamic drag, lift and aerodynamic moment；
Complete test velocity envolop refers to the velocity interval of test requirements document, preassigned experimental condition.Multimode parameter is
Refer to the design (calculated) load on hoverheight and suspension sledge vehicle, hoverheight and load are test requirements documents, preassigned experimental condition.
Numerical value emulation method is the prior art, and existing engineering software can be used and carry out, such as CFD numerical value emulation method.
Third step, aerodynamic moment judgement,
The aerodynamic moment and suspension sledge vehicle of suspension sledge vehicle under complete test velocity envolop that second step is obtained, multimode parameter
The maximum value of aerodynamic moment born compares, if all aerodynamic moments are both less than equal to bearing most for aerodynamic moment
Big value, then be transferred to the 4th step, be otherwise transferred to the 6th step；
The maximum value of suspension sledge vehicle aerodynamic moment born is determined according to the suspension system in suspension test.
4th step, lift judgement,
The lift and suspension sledge vehicle lift of suspension sledge vehicle under complete test velocity envolop that second step is obtained, multimode parameter
The maximum value born compare, if all lift, which are both less than, is equal to the maximum value born of lift, be transferred to the 5th
Step, is otherwise transferred to the 7th step；
The maximum value of suspension sledge vehicle lift born is determined according to the suspension system in suspension test.
5th step, aerodynamic drag judgement,
The aerodynamic drag and suspension sledge vehicle of suspension sledge vehicle under complete test velocity envolop that second step is obtained, multimode parameter
The maximum value born of aerodynamic drag compare, if all aerodynamic drags, which are both less than, is equal to bearing for aerodynamic drag
Maximum value, then be transferred to the 9th step, is otherwise transferred to the 8th step；
The maximum value that suspension sledge vehicle aerodynamic drag can be born is determined according to the propulsion system in suspension test.
6th step is modified the shape of suspension sledge vehicle, returns to second step；
The shape of suspension sledge vehicle is modified, the aerodynamic moment of suspension sledge vehicle is reduced, specific correction measure can refer to existing
About high-speed moving object Design of Aerodynamic Configuration.
Further, it is likely to occur in design, corrects iteration by multiple shape, the aerodynamic moment that is all not being met can be born
The suspension sledge vehicle shape of maximum value condition, it may be possible to which the suspension system design in suspension test is unreasonable, needs to suspension system
System is modified, and makes to be designed to continue.
It is specific as follows:
When A6.1, determination are unsatisfactory for the maximum value condition that aerodynamic moment can be born due to aerodynamic moment, outside suspension sledge vehicle
The number of iterations threshold value of shape amendment iteration；
The determination of the number of iterations threshold value is determined as the case may be, selects 20 times or so in common engineering design, repeatedly
It is bigger for frequency threshold value, can iteration number it is more, designer selects according to the requirement specifically designed.
A6.2, the accumulative modified number of shape；
If once meeting the maximum value condition that aerodynamic moment can be born, cumulative number is reset.
A6.3, every time amendment shape before, judge whether the modified number of shape is greater than the number of iterations threshold value, if more than then
No longer shape is modified, carries out step A6.4, if being not more than the number of iterations threshold value, the is returned after being modified to shape
Two steps；
Shape is corrected for the purpose of the aerodynamic moment for reducing suspension sledge vehicle.
A6.4, suspension sledge vehicle aerodynamic drag, lift and the aerodynamic moment for obtaining all numerical value emulation methods pass through excellent
Change objective function, obtains optimization object function value；
A6.5, minimum value is chosen from the optimization object function value that step A6.4 is obtained, according to corresponding and optimization aim letter
The aerodynamic moment of numerical value minimum value is adjusted suspension system, returns to the first step, restarts to design.
Purpose to suspension system adjustment is the maximum value that increases aerodynamic moment and can bear, and those skilled in the art are according to outstanding
Floating system principle and structure, can be used different modes to suspension system into adjustment, can bear as long as can reach and increase aerodynamic moment
The purpose of maximum value.
7th step is modified the shape of suspension sledge vehicle, returns to second step；
The shape of suspension sledge vehicle is modified, the lift of suspension sledge vehicle is reduced, specific correction measure can refer to existing pass
In high-speed moving object Design of Aerodynamic Configuration.
Further, as being likely to occur in the 6th step in design, iteration is corrected by multiple shape, be all not being met liter
Power can bear the suspension sledge vehicle shape of maximum value condition, it may be possible to which the suspension system design in suspension test is unreasonable, needs
It modifies to suspension system, makes to be designed to continue.
It is specific as follows:
A7.1, determine that the shape amendment of suspension sledge vehicle changes when being unsatisfactory for the maximum value condition that lift can be born due to lift
The number of iterations threshold value in generation；
The determination of the number of iterations threshold value is determined as the case may be, selects 20 times or so in common engineering design, repeatedly
It is bigger for frequency threshold value, can iteration number it is more, designer selects according to the requirement specifically designed.
A7.2, the accumulative modified number of shape；
If once meeting the maximum value condition that lift can be born, cumulative number is reset.
A7.3, every time amendment shape before, judge whether the modified number of shape is greater than the number of iterations threshold value, if more than then
No longer shape is modified, carries out step A7.4, if being not more than the number of iterations threshold value, the is returned after being modified to shape
Two steps；
Shape is corrected for the purpose of the lift for reducing suspension sledge vehicle.
A7.4, suspension sledge vehicle aerodynamic drag, lift and the aerodynamic moment for obtaining all numerical value emulation methods pass through excellent
Change objective function, obtains optimization object function value；
A7.5, minimum value is chosen from the optimization object function value that step A7.4 is obtained, according to corresponding and optimization aim letter
The lift of numerical value minimum value is adjusted suspension system, returns to the first step, restarts to design.
Purpose to suspension system adjustment is the maximum value that increases lift and can bear, and those skilled in the art are according to suspension system
Principle of uniting and structure, can be used different modes to suspension system into adjustment, can bear maximum value as long as can reach and increase lift
Purpose.
8th step is modified the shape of suspension sledge vehicle, returns to second step；
The shape of suspension sledge vehicle is modified, the aerodynamic drag of suspension sledge vehicle is reduced, specific correction measure can refer to existing
About high-speed moving object Design of Aerodynamic Configuration.
Further, as being likely to occur in the 6th step in design, iteration is corrected by multiple shape, be all not being met gas
Dynamic resistance can bear the suspension sledge vehicle shape of maximum value condition, it may be possible to and the propulsion system design in suspension test is unreasonable,
It needs to modify to propulsion system, makes to be designed to continue.
It is specific as follows:
When A8.1, determination are unsatisfactory for the maximum value condition that aerodynamic drag can be born due to aerodynamic drag, outside suspension sledge vehicle
The number of iterations threshold value of shape amendment iteration；
The determination of the number of iterations threshold value is determined as the case may be, selects 20 times or so in common engineering design, repeatedly
It is bigger for frequency threshold value, can iteration number it is more, designer selects according to the requirement specifically designed.
A8.2, the accumulative modified number of shape；
If once meeting the maximum value condition that aerodynamic drag can be born, cumulative number is reset.
A8.3, every time amendment shape before, judge whether the modified number of shape is greater than the number of iterations threshold value, if more than then
No longer shape is modified, carries out step A8.4, if being not more than the number of iterations threshold value, the is returned after being modified to shape
Two steps；
Shape is corrected for the purpose of the aerodynamic drag for reducing suspension sledge vehicle.
A8.4, suspension sledge vehicle aerodynamic drag, lift and the aerodynamic moment for obtaining all numerical value emulation methods pass through excellent
Change objective function, obtains optimization object function value；
A8.5, minimum value is chosen from the optimization object function value that step A8.4 is obtained, according to corresponding and optimization aim letter
The air drag of numerical value minimum value is adjusted propulsion system, returns to the first step, restarts to design.
Purpose to propulsion system adjustment is to increase the maximum value that can bear of aerodynamic drag, and those skilled in the art are according to pushing away
Into system principle and structure, different modes can be used to propulsion system into adjustment, can be born as long as can reach and increase aerodynamic drag
The purpose of maximum value.
Six, the seven, the optimization object function of eight steps is techniques well known, can use function of first order, second order function
Deng those skilled in the art can select as the case may be, and the optimization object function in three steps can be identical
Can be different, optimization object function is using aerodynamic drag, lift and aerodynamic moment as variable.
Further, step A6.4, the optimization object function of A7.4, A8.4 are with k1M%, k2FS%, k3FZ% is variable
Function, wherein k1For aerodynamic moment coefficient, k2For lift coefficient, k3Pneumatic drag coefficient, k1>k2>k3And k1+k2+k3=1,M is the suspension sledge vehicle aerodynamic moment that numerical value emulation method obtains, MmaxIt can be held for aerodynamic moment
The maximum value received；FSFor the suspension sledge vehicle lift that numerical value emulation method obtains, FSmaxFor lift
The maximum value that can be born；FZFor the suspension sledge vehicle aerodynamic drag that numerical value emulation method obtains,
FZmaxThe maximum value that can be born for aerodynamic drag.
9th step, obtains the suspension sledge vehicle shape for meeting suspension system, and design terminates.
A kind of suspension sledge vehicle designed using the above method.
The present invention compared with prior art the utility model has the advantages that
(1) present invention is designed using special suspension sledge vehicle, by reducing the design cycle to the comprehensive setting of design procedure,
Suspension sledge vehicle after making design can satisfy test requirements document, avoid causing test that can not carry out due to sledge vehicle, to repeat
Design experiment device；
(2) sledge vehicle airload can be effectively reduced in the sledge vehicle obtained using design method of the present invention, and it is steady to improve experimental rig
It is qualitative；
(3) convergence of profile optimization has been further determined in sledge vehicle of the present invention design, further lower design time
Cost；
(4) experimental rig of the present invention is designed using unique sledge vehicle, improves experimental rig stability and test safety.
Detailed description of the invention
Fig. 1 is design flow diagram of the present invention；
Fig. 2 is suspension test apparatus structure schematic diagram (side view) of the present invention；
Fig. 3 is suspension test apparatus structure schematic diagram (top view) of the present invention；
Fig. 4 is suspension test apparatus structure schematic diagram (side view) of the present invention.
Specific embodiment
Below with reference to specific example and attached drawing, the present invention is described in detail.
As shown in Figure 2,3, 4, the device of suspension test includes suspension sledge vehicle 1, suspension system 2 and propulsion system 3.Suspension system
System, which includes suspension railway, can be used electronic with the suspension structure being installed on suspension sledge vehicle according to the suspension type difference of use
Suspension system or magnetic suspension system, magnetic suspension system can be electromagnetic suspension system or permanent magnet suspension system.Propulsion system uses
Linear motor, can use linear synchronous motor or induction linear electric motor, and linear synchronous motor has efficiency at high speeds
High feature, is more suitable for propelled at high velocity.Existing design method can be used in the design of suspension system and propulsion system, such as can refer to
The relevant technologies such as magnetic suspension train, high-speed rail.
The design size constraint of suspension sledge vehicle determines that suspension system is in suspension test according to the suspension system of suspension test
A part, suspension test device includes suspension system, propulsion system and suspension sledge vehicle, before the design of suspension sledge vehicle, is suspended
System and propulsion system can all be determined according to test requirements document.
In this example, this example uses magnetic suspension system, and suspension system 2 includes roadbed 22 and rail system 21, track system
System 21 includes being mounted on roadbed 22 permanent magnet railway of two sides and the superconducting magnet being installed on suspension sledge vehicle below sledge vehicle.Road
Base 22 uses U-shaped design, and permanent magnet railway is installed in bottom, and two sides can prevent sledge vehicle from derailing, and reduces risk.Permanent magnetism in this example
Track length 400m, width 1m, suspension sledge vehicle lower surface is apart from raceway surface distance 0.0200m.
Propulsion system 3 uses linear motor, propulsive force F 44200N, it is contemplated that sledge vehicle peak acceleration is designed in test is
10g, sledge vehicle and gross laden weight are 400kg, therefore the aerodynamic drag f < F-ma that can be born, i.e. f=44200-400*10*9.8=
5000N。
According to suspension system and propulsion system, the dimension constraint and lift, aerodynamic moment and gas of following suspension sledge vehicle are determined
The maximum value that dynamic resistance can be born:
1, the dimension constraint of suspension sledge vehicle: sledge vehicle-width is not more than 0.96m, and length is not more than 5m, is highly no more than 1m.
2, the aerodynamic drag maximum value that suspension sledge vehicle is able to bear is 5000N, and lift maximum value is 6000N, pitching moment
Maximum value is that (aerodynamic moment is divided into pitching, yaw, rolling to 1000Nm, but due to sledge vehicle symmetric design, yaw and rolling moment are connect
Nearly 0, ignore in this test, the aerodynamic moment in this test can be replaced with pitching moment).
Further, it as shown in Figure 1, the present invention provides a kind of suspension sledge vehicle design method, is realized by following steps:
1, suspension sledge bassinet structure shape is primarily determined
It is constrained according to relative dimensions, constructs sledge bassinet structure shape, as shown in figure 4, sledge headstock portion uses pointed cone streamlined, subtracted
Small aerodynamic drag, while sledge headstock portion is suitably lower inclined, leading edge endpoint location height accounts for about sledge height less than 45%, reduces ground
The lift efficiency that effect generates it, sledge tailstock portion is restrained, and inhibits the generation of separation flowing, reduces resistance and separation miscarriage
Raw unsteady aerodynamic force.
2, using CFD numerical simulation calculation method, carry out full velocity envolop, under multimode parameter (in hoverheight, sledge vehicle
Load mission payload situation etc.) Aerodynamic characteristics of sledge vehicle, obtain sledge vehicle aerodynamic drag, lift and aerodynamic moment situation.
Velocity envolop is 0~1000km/h in this example, and speed stepping is 200km/h when test, and hoverheight is
0.02m loads mission payload 400kg.
Velocity interval is bigger, and stepping selection is smaller, and the state for needing to analyze is more, and those skilled in the art are according to reality
Experimental design is selected.
Table 1,2 gives part CFD numerical simulation data, and (step 1 original shape obtains under such as experimental condition of table 1
Such as the aerodynamic characteristic of table 2).
Table 1
Table 2
| Aerodynamic drag | Lift | Aerodynamic moment (pitching) | |
| Experimental condition 1 | 800N | 1000N | 100Nm |
| Experimental condition 2 | 2000N | 3000N | 300Nm |
| Experimental condition 3 | 3500N | 4000N | 600Nm |
| Experimental condition 4 | 5500N | 6000N | 900Nm |
| Experimental condition 5 | 8000N | 7500N | 1300Nm |
3, aerodynamic moment judges
Aerodynamic moment obtained in step 2 does not meet aerodynamic moment all compared with the maximum value that aerodynamic moment can be born
Less than or equal to the maximum value of aerodynamic moment born, sledge vehicle original shape is adjusted, its aerodynamic moment is reduced, returns again to
Step 2 re-starts iterative calculation, rejudges whether aerodynamic moment meets the maximum born less than or equal to aerodynamic moment
Value.
To reduce design time cost, to the convergence that profile optimization carries out, the number of iterations thresholding is 20 times in this example, if
It is able to satisfy the maximum value born less than or equal to aerodynamic moment at 20 times, then carries out lift judgement, if after iteration 20 times,
It is not able to satisfy still, then the aerodynamic characteristic obtained under each experimental condition in all the number of iterations is carried out through optimization aim letter
Number, obtains optimization object function value.
It is still unsatisfactory for, determines with k after 20 iteration in this example1M%, k2FS%, k3FZ% is the optimization aim of variable
Function f=k1M%+k2FS%+k3FZ%, those skilled in the art can select suitable variable and optimization according to their needs
Objective function.
k1For aerodynamic moment coefficient, 0.5, k is selected in this example2For lift coefficient, 0.3, k is selected in this example3Pneumatic resistance
Force coefficient selects 0.2 in this example,M is the suspension sledge vehicle gas that numerical value emulation method obtains
Kinetic moment, MmaxThe maximum value that can be born for aerodynamic moment；FSIt is obtained for numerical value emulation method
Suspension sledge vehicle lift, FSmaxThe maximum value that can be born for lift；FZFor numerical simulation side
The suspension sledge vehicle aerodynamic drag that method obtains, FZmaxThe maximum value that can be born for aerodynamic drag.
Minimum value is chosen from all optimization object function values, according to the corresponding gas with optimization object function value minimum value
Kinetic moment is adjusted to suspension system and (by enhancing magnetic field strength or increases the means such as magnet size), to increase aerodynamic moment
Maximum value can be born, step 1 is returned again to, re-starts design, the pitching moment that suspension sledge vehicle is able to bear in this example is maximum
Value increases 1300Nm from 1000Nm, and the lift maximum value being able to bear is 7000N.
Using steps 1 and 2,3, after iteration 10 times (in the number of iterations threshold range), meet aerodynamic moment both less than etc.
In the maximum value of aerodynamic moment born, lift judgement is carried out.
4, lift judges
Lift obtained in step 2 does not meet lift and is both less than equal to lift compared with the maximum value that lift can be born
The maximum value born, the sledge vehicle shape for meeting condition to step 3 is adjusted, reduces its lift, return again to step 2 again
It is iterated calculating, rejudges whether lift meets the maximum value born less than or equal to lift.
With as step 3, to the convergence that profile optimization carries out, in this example, lift is met for iteration 5 times both less than etc.
In the maximum value of lift born, the judgement of aerodynamic drag is carried out, if not meeting condition in number thresholding, is changed to all
The aerodynamic characteristic under each experimental condition is obtained in generation number (iteration carried out in lift deterministic process) to carry out by optimizing mesh
Scalar functions obtain optimization object function value, referring specifically to the method recorded in step 3, are only adjusted to suspension system
When, to increase for the purpose of lift can bear maximum value.
5, aerodynamic drag judges
Aerodynamic drag obtained in step 2 does not meet aerodynamic drag all compared with the maximum value that aerodynamic drag can be born
Less than or equal to the maximum value of lift born, the sledge vehicle shape for meeting condition to step 4 is adjusted, and reduces its pneumatic resistance
Power returns again to step 2 and re-starts iterative calculation, rejudges whether aerodynamic drag meets holding less than or equal to aerodynamic drag
The maximum value received.
With as step 3, to the convergence that profile optimization carries out, in this example, it is all small to meet aerodynamic drag iteration 3 times
In the maximum value born for being equal to aerodynamic drag, the configuration design of sledge vehicle is completed, if not meeting condition in number thresholding,
To the aerodynamic characteristic obtained in all the number of iterations (iteration carried out in aerodynamic drag deterministic process) under each experimental condition into
Row obtains optimization object function value by optimization object function, referring specifically to the method recorded in step 3, is only to propulsion
System is adjusted, rather than is adjusted to suspension system, when being adjusted to propulsion system, can be born most with increasing aerodynamic drag
For the purpose of big value.
Unspecified part of the present invention is known to the skilled person technology.
Claims (10)
1. a kind of design method of suspension sledge vehicle, which is characterized in that realized by following steps:
The first step designs the original shape of suspension sledge vehicle；
Second step carries out the aerodynamic characteristic of suspension sledge vehicle under complete test velocity envolop, multimode parameter using numerical value emulation method
Analysis, obtains suspension sledge vehicle aerodynamic drag, lift and aerodynamic moment；
Third step, aerodynamic moment judgement,
The aerodynamic moment of suspension sledge vehicle and suspension sledge vehicle are pneumatic under complete test velocity envolop that second step is obtained, multimode parameter
The maximum value of torque born compares, if all aerodynamic moments are both less than the maximum born for being equal to aerodynamic moment
Value, then be transferred to the 4th step, be otherwise transferred to the 6th step；
4th step, lift judgement,
The lift of suspension sledge vehicle and suspension sledge vehicle lift can under complete test velocity envolop that second step is obtained, multimode parameter
The maximum value of receiving compares, if all lift are both less than the maximum value born for being equal to lift, is transferred to the 5th step, no
Then it is transferred to the 7th step；
5th step, aerodynamic drag judgement,
The gas of the aerodynamic drag of suspension sledge vehicle and suspension sledge vehicle under complete test velocity envolop that second step is obtained, multimode parameter
The maximum value of dynamic resistance born compares, if all aerodynamic drags are both less than the maximum born for being equal to aerodynamic drag
Value, then be transferred to the 9th step, be otherwise transferred to the 8th step；
6th step is modified the shape of suspension sledge vehicle, reduces the aerodynamic moment of suspension sledge vehicle, returns to second step；
7th step is modified the shape of suspension sledge vehicle, reduces the lift of suspension sledge vehicle, returns to second step；
8th step is modified the shape of suspension sledge vehicle, reduces the aerodynamic drag of suspension sledge vehicle, returns to second step；
9th step, obtains the suspension sledge vehicle shape for meeting suspension system, and design terminates.
2. a kind of design method of suspension sledge vehicle according to claim 1, it is characterised in that: using such as in the 6th step
Lower convergence design,
A6.1, determine that the shape of suspension sledge vehicle is repaired when being unsatisfactory for the maximum value condition that aerodynamic moment can be born due to aerodynamic moment
The number of iterations threshold value of positive iteration；
A6.2, the accumulative modified number of shape；
A6.3, before amendment shape every time, judge whether the modified number of shape is greater than the number of iterations threshold value, if more than then no longer
Shape is modified, step A6.4 is carried out, if being not more than the number of iterations threshold value, returns to second after being modified to shape
Step；
A6.4, suspension sledge vehicle aerodynamic drag, lift and the aerodynamic moment for obtaining all numerical value emulation methods pass through optimization mesh
Scalar functions obtain optimization object function value；
A6.5, minimum value is chosen from the optimization object function value that step A6.4 is obtained, according to corresponding and optimization object function value
The aerodynamic moment of minimum value is adjusted suspension system, returns to the first step, restarts to design.
3. a kind of design method of suspension sledge vehicle according to claim 1, it is characterised in that: using such as in the 7th step
Lower convergence design,
A7.1, determine that the shape of suspension sledge vehicle corrects iteration when being unsatisfactory for the maximum value condition that lift can be born due to lift
The number of iterations threshold value；
A7.2, the accumulative modified number of shape；
A7.3, before amendment shape every time, judge whether the modified number of shape is greater than the number of iterations threshold value, if more than then no longer
Shape is modified, step A7.4 is carried out, if being not more than the number of iterations threshold value, returns to second after being modified to shape
Step；
A7.4, suspension sledge vehicle aerodynamic drag, lift and the aerodynamic moment for obtaining all numerical value emulation methods pass through optimization mesh
Scalar functions obtain optimization object function value；
A7.5, minimum value is chosen from the optimization object function value that step A7.4 is obtained, according to corresponding and optimization object function value
The lift of minimum value is adjusted suspension system, returns to the first step, restarts to design.
4. a kind of design method of suspension sledge vehicle according to claim 1, it is characterised in that: using such as in the 8th step
Lower convergence design,
A8.1, determine that the shape of suspension sledge vehicle is repaired when being unsatisfactory for the maximum value condition that aerodynamic drag can be born due to aerodynamic drag
The number of iterations threshold value of positive iteration；
A8.2, the accumulative modified number of shape；
A8.3, before amendment shape every time, judge whether the modified number of shape is greater than the number of iterations threshold value, if more than then no longer
Shape is modified, step A8.4 is carried out, if being not more than the number of iterations threshold value, returns to second after being modified to shape
Step；
A8.4, suspension sledge vehicle aerodynamic drag, lift and the aerodynamic moment for obtaining all numerical value emulation methods pass through optimization mesh
Scalar functions obtain optimization object function value；
A8.5, minimum value is chosen from the optimization object function value that step A8.4 is obtained, according to corresponding and optimization object function value
The air drag of minimum value is adjusted propulsion system, returns to the first step, restarts to design.
5. a kind of design method of suspension sledge vehicle according to claim 2,3 and 4, it is characterised in that: the optimization mesh
Scalar functions are using aerodynamic drag, lift and aerodynamic moment as variable.
6. a kind of design method of suspension sledge vehicle according to claim 5, it is characterised in that: described six, the seven, in eight steps
Optimization object function can it is identical can also be different.
7. a kind of design method of suspension sledge vehicle according to claim 5, it is characterised in that: the optimization object function
It is with k1M%, k2FS%, k3FZ% is the function of variable, wherein k1For aerodynamic moment coefficient, k2For lift coefficient, k3Aerodynamic drag
Coefficient, k1>k2>k3And k1+k2+k3=1,M is the suspension sledge vehicle that numerical value emulation method obtains
Aerodynamic moment, MmaxThe maximum value that can be born for aerodynamic moment；FSIt is obtained for numerical value emulation method
The suspension sledge vehicle lift arrived, FSmaxThe maximum value that can be born for lift；FZFor numerical simulation side
The suspension sledge vehicle aerodynamic drag that method obtains, FZmaxThe maximum value that can be born for aerodynamic drag.
8. a kind of design method of suspension sledge vehicle according to claim 5, it is characterised in that: the number of iterations threshold value
No more than 20 times.
9. a kind of design method of suspension sledge vehicle according to claim 1, it is characterised in that: according to outstanding in the first step
The design size constraint of floating sledge vehicle, designs the original shape of suspension sledge vehicle, and the design size constraint of suspension sledge vehicle is tried according to suspending
The suspension system tested determines.
10. a kind of suspension sledge vehicle obtained using design method described in claim 1-4.
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