JP2015049068A - Vibration tester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration tester capable of easily performing excitation in horizontal two-directions with high accuracy.SOLUTION: The vibration tester comprises: a lower part vibration table 11; a first excitation device 12 capable of exciting the lower part vibration table 11 in a horizontal X-direction; a second excitation device 13 capable of exciting the lower part vibration table 11 in a horizontal Y-direction crossing the X-direction; an upper part vibration table 14 disposed on the lower part vibration table 11; plural lamination rubbers 15, 16 disposed between the lower part vibration table 11 and the upper part vibration table 14; and a support mechanism 17 for supporting the upper part vibration table to the lower part vibration table along the Y-direction.

Description

  The present invention relates to a vibration test apparatus that performs a vibration test on a test body.

  As a conventional vibration test apparatus, for example, there is one described in Patent Document 1 below. The vibration test apparatus described in Patent Document 1 is provided with a plurality of vibration means and a plurality of vibration tables, and another vibration table is disposed on one vibration table, and each vibration means is operated in synchronization. Thus, a vibration test of the object to be inspected is performed. In this case, the vibration test equipment has a configuration in which another upper vibration table is placed on the lower vibration table, and a laminated rubber is interposed between the upper vibration table and the lower vibration table, and the resonance phenomenon is utilized with a simple structure. High acceleration excitation is possible.

  Moreover, as what gives the test body the excitation input of two directions or more, there exist some which were described in the following patent document 2, for example. The vibration test apparatus disclosed in Patent Document 2 is provided with a first vibration table that is vibrated in two directions by a first vibration unit as a first vibration apparatus, and a parallel link as a second vibration apparatus. A second vibration table is provided on the first vibration table that is vibrated by the second vibration means comprising a mechanism.

Japanese Patent No. 3901910 JP 2009-294150 A

  The vibration test apparatus disclosed in Patent Document 1 can give a high acceleration input to a test body by operating two excitation means in synchronization, but vibrates the test body on the vibration table. The direction is limited to one direction, and the specimen cannot be vibrated in a plurality of directions. For this reason, when the specimen is vibrated in a plurality of directions, it is necessary to rearrange the specimen, and workability is not good.

  The vibration test apparatus disclosed in Patent Document 2 can vibrate a test body in a plurality of directions, but the second vibration means is a parallel link mechanism constituted by a hydraulic cylinder, and the structure is complicated. Will increase the cost.

  The present invention solves the above-described problems, and an object of the present invention is to provide a vibration test apparatus that can easily perform high-precision vibration in two horizontal directions with a simple configuration.

  In order to achieve the above object, a vibration test apparatus of the present invention includes a lower vibration table, a first vibration device capable of vibrating the lower vibration table in a horizontal first direction, and the lower vibration table in the first direction. A second vibration device capable of exciting in a horizontal second direction intersecting with one direction, an upper vibration table disposed on the lower vibration table, and disposed between the lower vibration table and the upper vibration table A plurality of laminated rubbers, and a support mechanism that supports the upper vibration table movably along the first direction or the second direction with respect to the lower vibration table. is there.

  Therefore, when the lower vibration table is vibrated in the first horizontal direction by the first vibration device, the vibration force in the first direction is transmitted to the upper vibration table via the plurality of laminated rubbers. The specimen is vibrated in the first direction. Further, when the lower vibration table is vibrated in the second horizontal direction by the second vibration device, the vibration force in the second direction is transmitted to the upper vibration table via a plurality of laminated rubbers. The specimen is vibrated in the second direction. At this time, the upper vibration table is supported by the support mechanism so as to be movable along the first direction and the second direction with respect to the lower vibration table, so that the upper vibration table is moved in a direction other than the first direction or the second direction. Without being vibrated, it is possible to easily perform vibration in two horizontal directions with high accuracy with a simple configuration.

  In the vibration test apparatus according to the aspect of the invention, the support mechanism may have the other end of the laminated rubber whose one end is fixed to either the lower vibration table or the upper vibration table in the first direction or the second direction. It is characterized by being supported movably along

  Therefore, the support mechanism supports the other end portion of the laminated rubber so as to be movable in the first direction or the second direction, thereby preventing horizontal swing of the upper vibration table, thereby simplifying and reducing the apparatus. Cost reduction can be made possible.

  In the vibration testing apparatus according to the aspect of the invention, the laminated rubber has two parallel support portions whose other end portions are along the first direction or the second direction, and the support mechanism is the two parallel support portions. It is characterized by having two parallel guide portions that can move relative to each other along the first direction or the second direction.

  Therefore, the support mechanism enables the two parallel guide portions to move relative to the two parallel support portions of the laminated rubber in the first direction or the second direction, thereby simplifying the apparatus and reducing the cost. Can be made possible.

  In the vibration test apparatus of the present invention, the guide unit is detachable from the lower vibration table or the upper vibration table, and the guide direction can be changed between the first direction and the second direction. It is characterized by being.

  Therefore, since the guide unit is detachable from the vibration table and the guide direction can be changed, the vibration frequency for vibrating the specimen can be easily changed via the upper vibration table. Can be improved.

  In the vibration test apparatus according to the present invention, a container is fixed around the upper vibration table, and a plurality of bars whose surfaces are covered with rubber are accommodated in the container.

  Therefore, when the upper vibration table vibrates in the first direction or the second direction, a plurality of bar members in the container vibrate, collide with each other and wear, and a damping force acts on the upper vibration table. The damping force can be easily adjusted by changing the number of bars.

  In the vibration test apparatus of the present invention, the support mechanism moves along the first direction at the other end portion of the first laminated rubber whose one end portion is fixed to one of the lower vibration table and the upper vibration table. A first support mechanism for freely supporting, and the other end of the second laminated rubber whose one end is fixed to one of the lower vibration table and the upper vibration table are movably supported along the second direction. And a second support mechanism.

  Therefore, as the support mechanism, the first support mechanism that supports the other end portion of the first laminated rubber movably along the first direction, and the other end portion of the second laminated rubber movably along the second direction. Since the second support mechanism is provided to support, the upper shaking table is not vibrated in the direction other than the first direction or the second direction, and the specimen is appropriately shaken via the upper shaking table. In addition, the frequency of the exciting force in the first direction and the frequency of the exciting force in the second direction can be set to be the same.

  According to the vibration test apparatus of the present invention, the first vibration device capable of exciting the lower vibration table in the first horizontal direction and the second vibration device capable of vibrating the lower vibration table in the second horizontal direction. And an upper vibration table disposed on the lower vibration table via a plurality of laminated rubbers, and a support mechanism that supports the upper vibration table movably along the first direction or the second direction with respect to the lower vibration table; Therefore, the upper shaking table is not vibrated in the direction other than the first direction or the second direction by the support mechanism, and the vibration in the two horizontal directions can be easily performed with high accuracy with a simple configuration. be able to.

FIG. 1 is a front view illustrating a vibration test apparatus according to the first embodiment. FIG. 2 is a plan view illustrating the vibration test apparatus according to the first embodiment. FIG. 3 is a cross-sectional view taken along the line III-III in FIG. 2 showing a laminated rubber mounting structure. 4 is a cross-sectional view taken along the line IV-IV in FIG. 2 showing the support structure of the laminated rubber. FIG. 5 is a cross-sectional view taken along the line VV of FIG. 2 showing the support structure of the laminated rubber. 6 is a cross-sectional view taken along the line VI-VI in FIG. 5 showing the support structure of the laminated rubber. FIG. 7 is a cross-sectional view showing a laminated rubber support structure in the vibration test apparatus of the second embodiment. FIG. 8 is a plan view illustrating a vibration test apparatus according to the third embodiment.

  Exemplary embodiments of a vibration test apparatus according to the present invention will be explained below in detail with reference to the accompanying drawings. In addition, this invention is not limited by this embodiment, and when there are two or more embodiments, what comprises combining each embodiment is also included.

[First Embodiment]
FIG. 1 is a front view showing a vibration test apparatus according to the first embodiment, FIG. 2 is a plan view showing the vibration test apparatus according to the first embodiment, and FIG. 4 is a sectional view taken along the line IV-IV in FIG. 2 showing the support structure of the laminated rubber, FIG. 5 is a sectional view taken along the line V-V in FIG. 2 showing the supporting structure of the laminated rubber, and FIG. It is VI-VI sectional drawing of FIG. 5 showing the support structure of this.

  In the first embodiment, as shown in FIGS. 1 and 2, the vibration testing apparatus 10 includes a lower vibration table 11, a first vibration device 12, a second vibration device 13, an upper vibration table 14, A plurality of laminated rubbers 15 and 16 and a support mechanism 17 (see FIGS. 4 and 5) are provided.

  The lower vibration table 11 has a square shape in plan view and is set to a predetermined thickness. A plurality of spherical rollers 21 are mounted on the lower surface portion, and can be moved in the horizontal direction on the floor G. ing. The first vibration device 12 is composed of two hydraulic cylinders 22. Each hydraulic cylinder 22 has a main body 22 a fixed to a support wall surface W <b> 1, and a drive rod 22 b is rotatably connected to a side surface portion 11 a of the lower vibration table 11 by a connecting member 23. The second vibration device 13 is composed of two hydraulic cylinders 24. In each hydraulic cylinder 24, a main body 24 a is fixed to the support wall surface W <b> 2, and a drive rod 24 b is rotatably connected to the side surface portion 11 b of the lower vibration table 11 by a connecting member 25.

  In this case, the side surface portions 11a and 11b are substantially orthogonal to each other, and the two hydraulic cylinders 22 constituting the first vibration exciter 12 are horizontal with respect to the lower vibration table 11 by extending and contracting the drive rod 22b. An exciting force in the first direction, that is, the X direction can be applied. On the other hand, the two hydraulic cylinders 24 constituting the second vibration device 13 extend and contract the drive rod 24b to generate a vibration force in the second direction horizontal to the lower vibration table 11, that is, the Y direction. Can be granted. The X direction (first direction) and the Y direction (second direction) are horizontal directions and are substantially orthogonal to (intersect) each other.

  The upper vibration table 14 has a square shape smaller than that of the lower vibration table 11 in a plan view, and is set to a predetermined thickness. The upper vibration table 14 can be positioned and fixed with a predetermined jig by placing the test body T on the upper surface.

  The plurality of laminated rubbers 15 and 16 are disposed between the lower vibration table 11 and the upper vibration table 14. Laminated rubbers 15 and 16 have different configurations as will be described later, and a plurality of laminated rubbers 15 are arranged along the side of the lower vibration table 11 to which the second vibration device 13 is connected. Three of the lower vibration table 11 are arranged along the side away from the second vibration device 13. Further, three of the plurality of laminated rubbers 16 are arranged between the plurality of laminated rubbers 15 arranged three by three.

  As shown in FIG. 3, the plurality of laminated rubbers 15 include a multilayer body 15 a configured by alternately laminating a disk-shaped rubber material and a disk-shaped steel plate, and a rectangular shape connected to an upper portion of the multilayer body 15 a. It is composed of an upper support plate 15b having a (square shape) and a lower support plate 15c having a rectangular shape (square shape) connected to the lower portion of the multilayer body 15a. In the plurality of laminated rubbers 15, the upper support plate 15 b is fixed to the lower surface portion of the upper vibration table 14 via the support plate 31, and the lower support plate 15 c is fixed to the upper surface portion of the lower vibration table 11.

  On the other hand, as shown in FIG. 4 to FIG. 6, the plurality of laminated rubbers 16 include a multilayer body 16a configured by alternately laminating disc-shaped rubber materials and disc-shaped steel plates, and an upper portion of the multilayer body 16a. The upper support plate 16b has a rectangular shape (square shape) to be connected, and the lower support plate 16c has a rectangular shape (square shape) connected to the lower portion of the multilayer body 16a. In the plurality of laminated rubbers 16, the upper support plate 16 b is connected to the lower surface portion of the upper vibration table 14 via the support mechanism 17, and the lower support plate 16 c is fixed to the upper surface portion of the lower vibration table 11.

  The support mechanism 17 supports the upper vibration table 14 movably along the Y direction (second direction) with respect to the lower vibration table 11. That is, the support mechanism 17 is movable along the Y direction (second direction) on the upper support plate (other end portion) 16b of the laminated rubber 16 in which the lower support plate (one end portion) 16c is fixed to the lower vibration table 11. To support.

  More specifically, in the laminated rubber 16, two parallel support portions 41 along the Y direction are formed on the upper support plate 16b, and a free roller 42 is mounted on the upper portion of each support portion 41. On the other hand, the support mechanism 17 is formed such that two parallel guide portions 43 extending along the Y direction hang down on the lower surface portion of the upper vibration table 11. Each support portion 41 of the laminated rubber 16 is fitted to each guide portion 43 of the support mechanism 17 (upper vibration table 11), and the free roller 42 is in contact with the lower surface of the upper vibration table 11. The guide portion 43 is relatively movable along the Y direction, but is not relatively movable (integral movement) along the X direction.

  Here, a vibration test of the specimen T will be described using the vibration test apparatus 10 of the first embodiment.

  As shown in FIGS. 1 and 2, when each hydraulic cylinder 22 of the first vibration device 12 is driven to reciprocate, the lower vibration table 11 is vibrated in the X direction, and the vibration force in the X direction is a plurality of laminated rubbers. 15 and 16, the specimen T on the upper shaking table 14 is vibrated in the X direction. At this time, in the plurality of laminated rubbers 15, the upper support plate 15 b is fixed to the upper vibration table 14 and the lower support plate 15 c is fixed to the lower vibration table 11. The plurality of laminated rubbers 16 have an upper support plate 16b connected to the upper vibration table 14 via a support mechanism 17 and a lower support plate 16c fixed to the lower vibration table 11, but the support mechanism 17 supports the upper support. The plate 16b and the upper vibration table 14 cannot be moved relative to each other along the X direction. Therefore, the vibration in the X direction in the lower vibration table 11 is transmitted to the upper vibration table 14 by all (six) laminated rubbers 15 and all (three) laminated rubbers 16.

  On the other hand, when each hydraulic cylinder 24 of the second vibration device 13 is driven to reciprocate, the lower vibration table 11 is vibrated in the Y direction, and the vibration force in the Y direction is transmitted through the plurality of laminated rubbers 15 to the upper vibration table 14. The specimen T on the upper vibration table 14 is vibrated in the Y direction. At this time, in the plurality of laminated rubbers 15, the upper support plate 15 b is fixed to the upper vibration table 14 and the lower support plate 15 c is fixed to the lower vibration table 11. The plurality of laminated rubbers 16 have an upper support plate 16b connected to the upper vibration table 14 via a support mechanism 17 and a lower support plate 16c fixed to the lower vibration table 11, but the support mechanism 17 supports the upper support. The plate 16b and the upper vibration table 14 can be relatively moved along the Y direction. Therefore, all the vibrations in the Y direction in the lower vibration table 11 are transmitted to the upper vibration table 14 by (six) laminated rubbers 15.

  That is, when the lower vibration table 11 is vibrated in the X direction by the first vibration device 12, the support mechanism 17 makes it impossible for the upper support plate 16b and the upper vibration table 14 to move relative to each other in the X direction. The vibration in the X direction on the vibration table 11 is transmitted to the upper vibration table 14 by all the laminated rubbers 15 and 16. On the other hand, when the lower vibration table 11 is vibrated in the Y direction by the second vibration device 13, the support mechanism 17 enables relative movement in the Y direction between the upper support plate 16 b and the upper vibration table 14. Therefore, all (three) laminated rubbers 16 do not transmit the excitation force of the lower vibrating table 11 to the upper vibrating table 14, and the vibration in the Y direction in the lower vibrating table 11 is caused only by the six laminated rubbers 15. It is transmitted to the upper shaking table 14.

  As a result, the vibration test apparatus 10 includes the vibration frequency of the test body T in the Y direction by the first vibration apparatus 12 and the vibration frequency of the test body T in the Y direction by the second vibration apparatus 12. Can be different.

  Further, when the lower vibration table 11 is vibrated in the Y direction by the second vibration device 12, the upper support plate 15 b of the laminated rubber 16 and the upper vibration table 14 can be relatively moved along the Y direction by the support mechanism 17. Therefore, when the support mechanism 17 serves as a guide, the upper vibration table 14 can be appropriately vibrated along the Y direction with respect to the lower vibration table 11.

  Thus, in the vibration test apparatus of the first embodiment, the lower vibration table 11, the first vibration device 12 that can vibrate the lower vibration table 11 in the horizontal X direction, and the lower vibration table 11 are connected to X. The second vibration device 13 capable of exciting in the horizontal Y direction intersecting the direction, the upper vibration table 14 disposed on the lower vibration table 11, and disposed between the lower vibration table 11 and the upper vibration table 14. A plurality of laminated rubbers 15 and 16 and a support mechanism 17 that supports the upper vibration table 14 movably along the Y direction with respect to the lower vibration table 11 are provided.

  Therefore, when the lower vibration table 11 is vibrated in the horizontal X direction by the first vibration device 12, the X-direction vibration force is transmitted to the upper vibration table 14 via the plurality of laminated rubbers 15, 16. The specimen T on the shaking table 14 is vibrated in the X direction. In addition, when the lower vibration table 11 is vibrated in the horizontal Y direction by the second vibration device 13, the excitation force in the Y direction is transmitted to the upper vibration table 14 via the plurality of laminated rubbers 15. The specimen T on 14 is vibrated in the Y direction. At this time, the upper vibration table 14 is supported by the support mechanism 17 so as to be movable along the Y direction with respect to the lower vibration table 11, so that the upper vibration table 14 is moved in the Y direction when the second vibration device 13 is operated. Exciting in two horizontal directions (XY directions) can be performed easily and with high accuracy with a simple configuration.

  In the vibration test apparatus of the first embodiment, the support mechanism 17 supports the upper support plate 16b of the laminated rubber 16 in which the lower support plate 16c is fixed to the lower vibration table 11 movably along the Y direction. Accordingly, it is possible to prevent horizontal swing in the upper vibration table 14 other than the Y direction, and it is possible to simplify the apparatus and reduce the cost.

  In the vibration test apparatus of the first embodiment, two parallel support portions 41 along the Y direction are provided on the upper support plate 16b of the laminated rubber 16, and two parallel support portions 41 are provided on the lower surface portion of the upper vibration table 14 as Y. Two parallel guide portions 43 that are relatively movable along the direction are provided. Therefore, simplification and cost reduction of the device can be achieved.

  In the first embodiment, nine laminated rubbers 15 and 16 are arranged between the lower vibrating table 11 and the upper vibrating table 14, and a support mechanism 17 is provided for the three laminated rubbers 16. The upper vibration table 14 is supported so as to be movable along the Y direction with respect to the lower vibration table 11, but is not limited to this configuration. For example, the support mechanism 17 may be provided for the three laminated rubbers 16 so that the upper vibration table 14 can be movably supported along the X direction with respect to the lower vibration table 11.

  Further, as a support mechanism, a first support mechanism that supports the upper end portion of the first laminated rubber whose lower end portion is fixed to the lower vibration table 11 movably along the X direction, and the lower end portion is fixed to the lower vibration table 11. A second support mechanism that supports the upper end portion of the second laminated rubber to be movable along the Y direction may be provided. In this case, the upper vibration table 14 is not vibrated in directions other than the X direction and the Y direction when the first and second vibration devices 12 and 13 are operated, and the horizontal two directions (XY directions) with a simple configuration. ) Can be easily performed with high accuracy.

  In addition, by setting the same number of laminated rubbers to which the first support mechanism and the second support mechanism are attached, the frequency of the excitation force in the X direction and the frequency of the excitation force in the Y direction are set to be the same. can do.

[Second Embodiment]
FIG. 7 is a cross-sectional view showing a laminated rubber support structure in the vibration test apparatus of the second embodiment. In addition, the same code | symbol is attached | subjected to the member which has a function similar to the embodiment mentioned above, and detailed description is abbreviate | omitted.

  In the second embodiment, as shown in FIG. 7, the laminated rubber 16 includes a multilayer body 16 a, an upper support plate 16 b, and a lower support plate 16 c, and the upper support plate 16 b is connected to the upper vibration table via the support mechanism 51. 14, the lower support plate 16 c is fixed to the upper surface of the lower vibration table 11.

  In the laminated rubber 16, two parallel support portions 41 along the Y direction are formed on the upper support plate 16 b, and a free roller 42 is mounted on the upper portion of each support portion 41. On the other hand, the support member 52 constituting the support mechanism 51 is detachable from the upper vibration table 14. That is, the upper vibration table 14 is formed with a square mounting hole 14 a corresponding to the mounting position of the laminated rubber 16. The support member 52 has a lid 53 having a square ring shape larger than the mounting hole 14a, and two parallel guide portions 54 extending in the Y direction from the lid 53 into the mounting hole 14a. The upper vibration table 14 is fixed with a plurality of bolts 55. Each support portion 41 of the laminated rubber 16 is fitted to each guide portion 54 of the support member 52, the free roller 42 is in contact with the lower surface of the support member 54, and the support portion 41 and the guide portion 54 are Relative movement is possible along the direction, but relative movement is impossible (integral movement) along the X direction.

  In the second embodiment, since the support member 52 (guide portion 54) is detachable from the upper vibration table 14, the support member 52 of the support mechanism 51 is located with respect to the mounting hole 14a of the upper vibration table 14. By changing the fitting direction by 90 degrees in the horizontal direction, it is possible to change the directions (X direction and Y direction) in which relative movement is possible between the upper vibration table 14 and the laminated rubber 16.

  As described above, in the vibration test apparatus according to the second embodiment, the support member 52 (guide portion 54) is detachable from the upper vibration table 14, and is fitted in the mounting hole 14a of the upper vibration table 14. Can be changed. Therefore, the direction (X direction and Y direction) in which relative movement is possible between the upper vibration table 14 and the laminated rubber 16 can be changed, and the frequency at which the specimen T is vibrated through the upper vibration table 14 is changed. It can be easily changed and versatility can be improved.

[Third Embodiment]
FIG. 8 is a plan view illustrating a vibration test apparatus according to the third embodiment. In addition, the same code | symbol is attached | subjected to the member which has a function similar to the embodiment mentioned above, and detailed description is abbreviate | omitted.

  In the third embodiment, as shown in FIG. 8, the vibration test apparatus 60 includes a lower vibration table 11, a first vibration device 12, a second vibration device 13, an upper vibration table 14, and a plurality of stacked layers. It has rubber | gum 15,16 and the support mechanism 17 (refer FIG.4 and FIG.5).

  The first vibration device 12 is composed of two hydraulic cylinders 22 and can vibrate the lower vibration table 11 in the X direction. The second vibration device 13 is composed of two hydraulic cylinders 24 and can vibrate the lower vibration table 11 in the Y direction. The upper vibration table 14 is disposed on the lower vibration table 11 via a plurality of laminated rubbers 15 and 16, and can position and fix the specimen T on the upper surface portion.

  The support mechanism 17 (see FIGS. 4 and 5) supports the upper vibration table 14 movably along the Y direction (second direction) with respect to the lower vibration table 11. That is, the support mechanism 17 is movable along the Y direction (second direction) on the upper support plate (other end portion) 16b of the laminated rubber 16 in which the lower support plate (one end portion) 16c is fixed to the lower vibration table 11. To support.

  The upper vibration table 14 has four damping members 61 fixed around it. The damping member 61 is composed of a container 62 fixed around the upper vibration table 14 and a plurality of bar members (electric wires, etc.) 63 housed in the container 62 and having a surface covered with rubber. Yes.

  Therefore, when the lower vibration table 11 is vibrated in the X direction by the first vibration device 12, the vibration force in the X direction is transmitted to the upper vibration table 14 via the plurality of laminated rubbers 15 and 16, and this upper vibration The specimen T on the table 14 is vibrated in the X direction. Further, when the lower vibrating table 11 is vibrated in the Y direction by the second vibrating device 13, the exciting force in the Y direction is transmitted to the upper vibrating table 14 via the plurality of laminated rubbers 15, 16, and this upper vibration. The specimen T on the table 14 is vibrated in the Y direction. At this time, the plurality of bar members 63 in the container 62 fixed on the upper vibration table 14 vibrate, collide with each other and wear, so that a damping force acts on the upper vibration table 14. Therefore, the optimum damping force can be easily adjusted by changing the number of the bars 63.

  As described above, in the vibration test apparatus of the third embodiment, a plurality of bar members 63 whose surfaces are covered with rubber are accommodated in the container 62 as the damping member 61 around the upper vibration table 14. .

  Therefore, when the upper vibration table 14 vibrates in the X direction or the Y direction, the plurality of bar members 63 in the container 62 vibrate, collide with each other and wear, and thus a damping force acts on the upper vibration table 14. Here, the damping force can be easily adjusted simply by changing the number of the bars 63.

  The inertia type vibration test apparatus needs to be controlled so that the damping ratio of the upper vibration table as a resonance vibration table can be accurately added, and additional equipment such as a control device and a hydraulic pump is indispensable. The vibration test apparatus 60 of the third embodiment is a resonant vibration table by disposing the upper vibration table 14 on the lower vibration table 11 via a plurality of laminated rubbers 15 and 16. Therefore, when excitation is performed with a sine wave in the vicinity of the natural frequency of the upper vibration table 14, a response corresponding to the damping ratio is obtained. When the damping ratio is small, the response magnification is large in the vicinity of the natural frequency. Therefore, it is necessary to input the input level and the frequency with high accuracy in order to obtain the response amount accurately. However, if the attenuation can be added, the response magnification decreases, so that the response amount can be accurately obtained by input adjustment of only the input level. When a plurality of bar members 63 whose surfaces are covered with rubber are stacked in the container 62, the bar members 63 vibrate in the excitation direction due to the vibration of the upper vibration table 14. A damping element is added to the response of the upper shaking table 14 due to sliding friction and impact between the bars 63 generated at this time. If attenuation can be added with such a simple device, the adjustment and the like are simplified.

  In the above-described embodiment, nine laminated rubbers 15 and 16 are disposed between the lower vibrating table 11 and the upper vibrating table 14, and the support mechanism is provided between the three laminated rubbers 16 and the upper supporting table 14. However, the present invention is not limited to this configuration. For example, a support mechanism may be provided between the three laminated rubbers 16 and the lower support base 11. Moreover, arrangement | positioning of two types of laminated rubber 15 and 16 is not limited to embodiment, What is necessary is just to set an arrangement position and the number of arrangement | positioning suitably.

DESCRIPTION OF SYMBOLS 10,60 Vibration test apparatus 11 Lower vibration table 12 1st vibration device 13 2nd vibration device 14 Upper vibration table 15, 16 Laminated rubber 17, 51 Support mechanism 41 Support part 43, 54 Guide part 52 Support member 61 Damping member 62 Container 63 Bar T Specimen

Claims (6)

A lower shaking table,
A first vibrating device capable of vibrating the lower shaking table in a horizontal first direction;
A second vibrating device capable of vibrating the lower shaking table in a horizontal second direction intersecting the first direction;
An upper shaking table disposed on the lower shaking table;
A plurality of laminated rubber disposed between the lower shaking table and the upper shaking table;
A support mechanism for supporting the upper vibration table movably along the first direction or the second direction with respect to the lower vibration table;
A vibration test apparatus comprising:   The support mechanism supports the other end of the laminated rubber, one end of which is fixed to one of the lower vibration table and the upper vibration table, movably along the first direction or the second direction. The vibration test apparatus according to claim 1.   The laminated rubber has two parallel support portions whose other end portions are in the first direction or the second direction, and the support mechanism is configured to move the two parallel support portions in the first direction or the The vibration test apparatus according to claim 2, further comprising two parallel guide portions that are relatively movable along the second direction.   The guide unit is detachable with respect to the lower vibration table or the upper vibration table, and a guide direction can be changed between the first direction and the second direction. Item 4. The vibration test apparatus according to item 3.   5. The container according to claim 1, wherein a container is fixed around the upper shaking table, and a plurality of bars whose surfaces are covered with rubber are accommodated in the container. The vibration test apparatus described.   The support mechanism is a first support mechanism that supports one end of the first laminated rubber whose one end is fixed to either the lower vibration table or the upper vibration table so as to be movable along the first direction. And a second support mechanism for supporting one end portion of the second laminated rubber, which is fixed to one of the lower vibration table and the upper vibration table, movably along the second direction. The vibration test apparatus according to any one of claims 1 to 5, wherein

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