JPH08292122A - Distributed/integrated type vibrating table - Google Patents

Abstract

PURPOSE: To make it possible to provide a table as the large table as required even for the vibration test of a large structure with the relatively light-weight construction by moving a plurality of all vibrating tables in synchronization. CONSTITUTION: A plurality of relatively small vibrating tables 1 are utilized, and all the small vibrating tables 1 are moved in synchronization. Thus, the entire vibrating tables are operated equivalently as one large vibrating table. For example, the vibrating tables are constituted of 3×3=9 tables. When each vibrating table 1 is slid or turned and the interval between the tables is expanded, the tables can be utilized as the large vibrating table. In the case for a small-scale body under test, only one or limited number of the vibrating tables 1 are selected and utilized. Thus, it is not necessary to operate all number of the vibrating tables 1. Therefore energy saving is achieved. In this case, the respective vibrating tables are divided into the groups, and a plurality of the independent tests can be performed at the same time. Furthermore, even for one body under test, each vibrating body 1 can be operated so as to have mutual correlation each other when a plurality of required input points are provided.

Description

Detailed Description of the Invention

[0001]

[Field of Industrial Application] The present invention is applicable to the distribution of seismic shaking tables, etc.
Regarding integrated shaking table.

[0002]

2. Description of the Related Art A vibration table, particularly an earthquake vibration table, is mainly used as a single unit. However, in some cases, there is also a usage form in which a long test piece such as a bridge is supported by using two vibrating tables and supporting two points in the longitudinal direction individually by using two vibrating tables. Has been.

[0003]

By the way, the table size of the vibrating table is determined by the maximum equipment area of the test body requiring the test, and for example, the existing largest vibrating table table size in the world is 15 m × 15 m. However, in recent years, a table size exceeding 15 m × 15 m in a test of a full-scale building, a civil engineering structure, etc., for example, a table size of 30 m ×
There is a need for a shaking table with 30 m. Such a large vibration table needs to have a sufficiently high eigenvalue with respect to the vibration frequency due to the characteristics of the device used for the vibration test. However, when the table exceeds 15 m × 15 m, for example, 30 m × 30 m, the weight of the table becomes extremely heavy in order to secure the rigidity. By the way, in order to secure the eigenvalue of 30 Hz, the table size is 30 m × 30 m, the table thickness is 9 m, and the steel plate welded structure has a weight of 4000 t. The specifications of the existing table size of 15 m × 15 m, which is the largest in the world, are as shown in the plan view of FIG.
The weight is 420 t, the eigenvalue is 60 Hz, and the vibration frequency is 30 Hz. From this, it is considered that it is very difficult in terms of technology and cost to realize a vibrating table having a 30 m × 30 m table.

The present invention has been proposed in view of the above circumstances, and it is easy to handle because it is made of a relatively lightweight structure and can be used for a vibration test of a large structure as a large table if necessary. The purpose is to provide a high-performance and economical distributed / integrated shaking table.

[0005]

In order to achieve such an object, the present invention is a composite vibration table in which a plurality of vibration tables of the same size are arranged at a predetermined interval and are arranged in front, back, left and right. And a correlation control means for independently controlling each vibrating table or operating each vibrating table in correlation with each other. And

[0006]

According to such a structure, one vibrating table is used for 30
It is difficult to realize an mx30m shaking table, but by using a plurality of relatively small shaking tables and moving all the small shaking tables in synchronization, the whole becomes one large shaking table. It can act effectively.

[0007]

1 is a schematic plan view showing the basic concept of the present invention, and FIG. 2 is a state in which the intervals between the tables are enlarged by applying the tables of FIG. FIG. 3 is a plan view showing the whole of the vibrating table of FIG. 1 in which a part of adjacent vibrating tables are thinned out.

In the above figure, the same symbols as those in FIG. 4 indicate the same members as those in FIG. 4, and the vibrating table in FIG.
This is a vibrating table composed of × 3 = 9 units, and shows a state where the intervals between the tables are closest to each other.

Next, FIG. 2 shows a state in which the vibrating table of FIG. 1 is slid or refilled to increase the distance between the tables as compared with FIG. Such a structure is shown in a plan view when it is used as a large vibration table.

FIG. 3 corresponds to FIG. 1 and shows a type in which adjacent vibrating tables are partially thinned, and in this case, the entire vibrating table is composed of five vibrating tables.

[0011]

According to the present invention, a plurality of (four or more) small vibration tables capable of vibrating up to a high frequency (here, high frequency means 50 Hz or more) are moved in synchronization. This makes it possible to use up to a high frequency by making the whole equivalent to one large vibrating table, and slide or resize each vibrating table to increase the distance between the tables, and use it as a larger vibrating table. be able to. In the case of a small-scale test body, by selecting and using only one vibrating table or a limited number of vibrating tables, it is not necessary to move all the vibrating tables, so energy can be saved. In this case, each vibrating table can be divided into groups and a plurality of independent tests can be simultaneously performed. Here is the need to control each shaking table independently. In addition, even if it is a single test piece, if there are multiple required input points and you want to correlate the inputs with each other, mount the test pieces on each shaking table and support them by moving them in correlation with each other. Can be tested.

In short, according to the present invention, in a composite vibrating table in which a plurality of vibrating tables of the same size are arranged at a predetermined distance from each other in the front, rear, left and right directions, all of the above vibrating tables are moved in synchronization with each other. By having means for operating as an integrated vibrating table and correlation control means for independently controlling each vibrating table or operating in correlation with each other, it is made with a relatively lightweight structure, and if necessary, it can be made large. The present invention is extremely useful industrially because it provides an easy-to-handle, high-performance and economical distributed / integrated shaking table that can be used as a table for vibration testing of large structures.

[Brief description of drawings]

FIG. 1 is a plan view showing the basic concept of an embodiment of the present invention.

FIG. 2 is a plan view showing an application example of FIG. 1 in which a space between tables is enlarged.

FIG. 3 is a plan view corresponding to FIG. 1 and showing a type in which vibrating tables adjacent to each other are partially thinned.

FIG. 4 is a schematic diagram showing a conventional world's largest horizontal and vertical biaxial shaking table.

[Explanation of symbols]

1 Small shaking table which is one module constituting the shaking table of the present invention 2 World's largest shaking table 3 Horizontal shaker 4 Vertical shaker 5 Horizontal vibration shaker link joint 6 Vertical vibration shaker link joint l _x , l _y X-direction and Y-direction total length of the entire vibrating table of the present invention X _i , Y _i gap between each table

Claims (1)

[Claims] 1. A composite vibrating table in which a plurality of vibrating tables of the same size are arranged at a predetermined distance from each other in the front, rear, left and right, and all the vibrating tables are moved in synchronization to form an integrated vibrating table. A distributed / integrated vibrating table comprising means for operating and vibrating table for independent control, or correlation control means for operating in a mutually correlated manner.