JP3468913B2 - Distributed and integrated shaking table - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention
It relates to an integrated shaking table. 2. Description of the Related Art Conventionally, a shaking table, especially an earthquake shaking table, is mainly used by one shaking table. However, there is also a known form of use in which a long test piece such as a bridge uses two shaking tables to individually support two longitudinal points using two shaking tables. Have been. [0003] The table size of a shaking table is determined by the maximum equipment area of a test body that requires a test. For example, the largest shaking table size existing in the world is 15m x 15m. It is. However, in recent years, a table size exceeding 15 m × 15 m, for example, a table size of 30 m × 3 in a test of a full-scale building, civil engineering structure, or the like.
There is a need for a shaking table with 0 m. Such a large shaking table needs to have a sufficiently high eigenvalue with respect to the vibration frequency due to the characteristics of the apparatus used for the vibration test. However, over 15m x 15m,
For example, if the table has a size of 30 m × 30 m, the weight of the table becomes extremely heavy for securing the rigidity. By the way, in order to secure an eigenvalue of 30 Hz , the table size is 30 m × 30 m, the table thickness is 9 m, and the weight of the steel plate is 4000 t. The specifications of the existing world's largest table size of 15m x 15m are as follows:
As shown in the plan view and side view of FIG. 4, the table thickness is 3.5 m, the weight is 420 t, the characteristic value is 60 Hz, and the vibration frequency is 30 Hz. From this, it is considered that it is very difficult to realize a shaking table having a table of 30 m × 30 m both technically and costly. [0004] The present invention has been proposed in view of such circumstances, a relatively made of lightweight construction, large structures handled easily capable subjected to vibration test of as a large table if necessary It is an object of the present invention to provide a high-performance and economical distributed / integrated shaking table. [0005] [Means for Solving the Problems] To achieve the above object, the dispersion-integrated vibrating table of the present invention, the vibrating table of a plurality of mutually <br/> same size, predetermined therebetween a to have a spacing composite vibrating table was <br/> arranged, each of the vibrating table is, Sly
Can change the distance between the above vibrating tables.
Together are slidably supported so that the means for actuating the overall integrated vibrating table by moving in synchronization of all the respective vibrating table, the control or correlated individual vibrating table independently It is or is operated to have
Characterized in that e Bei correlation control means may Rukoto, a. According to such a configuration, one shaking table can be used for 30
Although it is difficult to realize an mx 30 m shaking table, by using a plurality of relatively small shaking tables and moving all the small shaking tables in synchronism, the whole is equivalent to one large shaking table. It can work effectively. FIG. 1 is a schematic plan view showing the basic concept of the present invention, and FIG. 2 is a diagram showing an application of the table of FIG. FIG. 3 is an overall plan view showing an enlarged state, and FIG. 3 is a plan view of the vibration table of FIG. 1 showing a type in which some of the vibration tables adjacent to each other are thinned out. In the upper drawing, the same reference numerals as those in FIG. 4 denote the same members as those in the same drawing.
× 3 = 9 shake tables, showing a state in which the intervals between the tables are closest. [0009] Next, FIG. 2 is a slide of the respective vibrating table of FIG. 1
So it shows a state in which enlarged compared to spacing between the tables in FIG. Such a structure is shown in a plan view when it is used as a large shaking table. FIG. 3 corresponds to FIG. 1 and shows a type in which vibration tables adjacent to each other are partially thinned out. In this case, the entire vibration table is an example constituted by five vibration tables. According to the present invention, a plurality (four or more) of small vibrating tables capable of vibrating up to a high frequency (here, the high frequency means 50 Hz or more) are synchronized. By moving it, the whole can be used up to high frequency equivalent to one large shaking table, and each shaking table can be slid.
By expanding the interval between the tables , the table can be used as a larger shaking table. In the case of a small-scale test specimen, by selecting and using only one or a limited number of shaking tables, it is not necessary to move all the shaking tables, so that energy can be saved. In this case, each shaking table is divided into groups, and a plurality of independent tests can be performed simultaneously. Here is the need to control each shaking table independently. In addition, when there are multiple required input points even for a single test object and it is desired to correlate the inputs with each other, the test samples must be mounted and supported on each shaking table, and moved by correlating each other. Test is possible. [0012] In summary, according to the distributed-integrated vibrating table of the present invention, the vibration table of a plurality of the same size with each other, a composite vibrating table which is arranged to have a spacing of Tokoro <br/> constant therebetween ,the above
Each shaking table slides the space between each shaking table.
Slidably supported so that it can be changed
Together have, be or the whole by moving in synchronization of all the respective vibrating table actuated by providing a means for operating as an integral vibrating table, the control or correlated individual vibrating table independently Possible correlation control means,
By the example Bei, relatively made of lightweight construction, handling easily obtained, high-performance and economical distributed and integrated vibration table that can be subjected to vibration testing of a large structure as a large table if necessary Therefore, the present invention is extremely useful in industry.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view showing a basic concept of an embodiment of the present invention. FIG. 2 is a plan view showing an application example of FIG. 1 and showing a state in which an interval between tables is enlarged. FIG. 3 is a plan view corresponding to FIG. 1 and showing a type in which vibration tables adjacent to each other are partially thinned out. FIG. 4 is a schematic diagram showing a conventional two-axis horizontal and vertical shaking table in the world. DESCRIPTION OF THE SYMBOLS 1 Small compact shaking table which is one module that constitutes the shaking table of the present invention 2 World's largest shaking table 3 Horizontal shaker 4 Vertical shaker 5 Link joint for horizontal shaker 6 Vertical shaker for exciter link joint l _x, X-direction of the whole vibrating table l _y present invention, Y
Direction overall length X _i, Y _i X direction between the tables, Y-direction gap

Claims (1)

(57) a shaking table of the Claims: 1. A plurality of identical size to each other, the phase
Met composite vibrating table which is arranged to have a predetermined interval互間
And each of the vibrating tables is moved between the respective vibrating tables by sliding.
Slidable so that you can change the spacing
Together they are lifting, have all the means for actuating the whole by the vibration table to synchronize the move as an integrated vibrating table, the individual mutually phase <br/> function or control the vibrating table independently was characterized in that example Bei correlation control means, a capable or is operated, distributed and integrated vibrating table.