JP5500608B2 - Vibration test equipment - Google Patents

Description

  The present invention relates to a vibration test apparatus used for a vibration test, and more particularly to a vibration test apparatus that generates a large acceleration or a large displacement by combining a plurality of shakers.

  In Patent Document 1, as shown in FIG. 5, a second shaker 102 and a second shaker 103 are installed on a first shaker 101 that is vibrated by a first shaker 100. 1. A vibration test in which the second vibrators 100 and 102 are synchronized so that the specimen placed on the second shaking table 103 is subjected to acceleration and displacement that cannot be obtained by using the vibrator alone. An apparatus is disclosed.

Japanese Utility Model Publication No. 61-122544

  However, in the configuration of Patent Document 1, since the weight of the second shaker 102, the second shake table 103, and the specimen is added to the first shake table 101, the first shake table 101 and the The sliding mechanism 104 that slidably supports the first shaking table 101 needs to be made robust, leading to an increase in the size of the apparatus and an increase in manufacturing cost.

  In addition, as the size of the first shaking table 101 increases, the capacity of the first shaker 100 (vibration force) must be increased, which increases the size and introduction cost of the first shaker 100. Was supposed to lead to an increase in operating costs.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a vibration test apparatus that is small and inexpensive while eliminating the above-described problems and realizing large acceleration and large displacement.

  In order to solve the above-mentioned problems, the vibration test apparatus of the present invention includes a first vibration exciter 2 and a first vibration table 3 that is vibrated by the first vibration exciter 2 to form a first vibration exciter 4. By configuring the second vibration mechanism 8 with the second vibration table 6 attached to the first vibration table 3 and the second vibration table 7 vibrated by the second vibration device 6. A vibration test apparatus that vibrates the second shaking table 7 in a specific direction by both the first shaker 2 and the second shaker 6, and the first shaker 2 is supported by the base 20. The first vibration table 3 is supported by the base 20 via the first sliding mechanism 5, and the second vibration table 7 is not slid through the first vibration table 3 and the second sliding table 5. It is supported by the base 20 through the mechanism 9.

  In the vibration testing apparatus according to another embodiment of the present invention, the first vibration exciter 2 and the first vibration table 3 vibrated by the first vibration exciter 2 constitute a first vibration exciter 4. By configuring the second vibration mechanism 8 by the second vibration table 6 attached to the first vibration table 3 and the second vibration table 7 vibrated by the second vibration device 6, A vibration test apparatus that vibrates the second shaking table 7 in a specific direction by both the first shaker 2 and the second shaker 6, wherein the first shaker 2 is supported by the base 20, The first shaking table 3 is supported by the base 20 via the first sliding mechanism 5, and the second shaking table 7 does not pass through the first shaking table 3 and is defined as the specific direction. It is characterized in that it is supported by the base 20 via a third shaking table 12 that is vibrated in another orthogonal direction and a second sliding mechanism 9.

  Furthermore, the second vibrator 6 and the second shaking table 7 are connected by a connecting means 10 that transmits displacement only in the specific direction.

  Furthermore, the second shaker 6 is an electrodynamic shaker.

  The second vibrator 6 is characterized in that it outputs a higher frequency and smaller displacement than the first vibrator 2.

  Further, the specific direction is a horizontal direction.

  In the vibration testing apparatus of the present invention, the second shaking table is supported by the base without the first shaking table, that is, the first shaking table does not bear the weight of the second shaking table and the specimen. The first vibration table and the first sliding mechanism do not need to be robust unlike the conventional vibration test apparatus. Therefore, the first shaking table and the first sliding mechanism can be reduced in size and weight, and the manufacturing cost can be reduced. In addition, by reducing the weight of the first shaking table, the capacity of the first shaker can be reduced by that amount, reducing the size of the first shaker, reducing the introduction cost, and further reducing the operating cost. Can be achieved.

  In the vibration test apparatus according to another embodiment of the present invention, since the second vibration table is supported by the base without the first vibration table, the first vibration table and the first sliding mechanism are robust. There is no need. Therefore, the first shaking table and the first sliding mechanism can be reduced in size and weight, and the manufacturing cost can be reduced. In addition, by reducing the weight of the first shaking table, the capacity of the first shaker can be reduced by that amount, reducing the size of the first shaker, reducing the introduction cost, and further reducing the operating cost. Can be achieved. Moreover, in this vibration test apparatus, the third shaking table supports the second shaking table in a state independent of the first and second shaking machines and the first shaking table, thereby realizing multi-axis excitation. However, the apparatus can be downsized and the manufacturing cost can be reduced.

  Moreover, since the 2nd shaker and the 2nd shaking table are connected by the connection means which transmits the displacement only in the said specific direction, the weight of the 2nd shaking table and test piece to the 2nd shaker side Can be prevented.

  Furthermore, even if the second shaker is an electrodynamic shaker (electromagnetic shaker), the second shaker and the second shaking table are not in contact with each other. It is possible to prevent transmission of the weight of the second shaking table or specimen to the side of the vibrator.

  Further, a high-accuracy vibration test can be performed by outputting a high frequency and small displacement that are easily attenuated by the second shaker on the side closer to the specimen.

  Furthermore, by setting the exciting direction of the first and second vibrators to the horizontal direction, it is sufficient that the exciting force required for the first and second vibrators is contrary to the resistance generated by the sliding mechanism. Therefore, the vibration exciter can be made smaller than the vibration in the vertical direction. As a result, the apparatus can be further downsized and the manufacturing cost can be reduced.

It is a front view which shows the outline of the vibration test apparatus which concerns on embodiment of this invention. It is an end view which shows the internal structure of a vibration exciter. It is a top view which shows the outline of the connection part of a 2nd shaker and a 2nd vibration stand. It is a front view which shows the outline of the vibration test apparatus which concerns on different embodiment of this invention. It is a front view which shows the outline of the conventional vibration test apparatus.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a front view showing an outline of a vibration test apparatus 1 according to the first embodiment. The vibration testing apparatus 1 includes a first vibration exciter 2 including a first vibration exciter 2 and a first vibration exciter 3 that is vibrated by the first exciter 2. A second vibration mechanism 8 is provided that includes the attached second vibrator 6 and a second shaking table 7 that is vibrated by the second vibrator 6.

  For example, as shown in FIG. 2, the first vibrator 2 includes an electromagnetic coil 31 provided on the inner peripheral side of the outer cylinder 30 and an inner cylinder 33 provided in the outer cylinder 30 via a gap 32. By cooperating with the permanent magnet 34, an electrodynamic exciter (electromagnetic type) that vibrates the inner cylinder 33 in the axial direction of the outer cylinder 30 while the outer cylinder 30 and the inner cylinder 33 are not in contact with each other. As shown in FIG. 1, it is supported by the base 20 such that the direction of vibration is in the horizontal direction. The first vibration table 3 is connected to the inner cylinder 33 side.

  As shown in FIG. 1, the first shaking table 3 is supported by the base 20 via the first sliding mechanism 5. The first sliding mechanism 5 is, for example, a linear guide in which a guide roller incorporating a ball bearing rolls on a guide rail, and the guide rail is parallel to the excitation direction of the first shaker 2. By being installed on the base 20 in such a manner, the first shaking table 3 is configured to slide only in the exciting direction of the first shaker 2. A second vibration exciter 6 is attached on the first vibration table 3.

  The second shaker 6 is an electrodynamic shaker having the same configuration as the first shaker 2, for example. And as shown in FIG. 1, it attaches to the 1st vibration stand 3 so that an excitation direction may turn into the same direction as the excitation direction of the 1st shaker 2. As shown in FIG. The second shaking table 7 is connected to the inner cylinder 33 side. As the second vibrator 6, it is preferable to select one having a high frequency and small displacement output as compared with the first vibrator 2. With this configuration, it is possible to reliably transmit a high frequency and a small displacement that easily attenuates due to a gap generated between members to the specimen 21 and to perform a highly accurate vibration test. In general, a vibrator that outputs a small displacement at a high frequency is smaller and lighter than a vibrator that outputs a large displacement at a low frequency. If it is located in the position, the burden on the shaking table that supports it and the vibration exciter that vibrates them is reduced, so that the apparatus can be downsized and the manufacturing cost can be reduced.

  As shown in FIG. 1, the second vibration table 7 is supported by the base 20 via the second sliding mechanism 9. The second sliding mechanism 9 is, for example, a linear guide having the same configuration as the first sliding mechanism 5, and the guide rail is parallel to the exciting direction of the second shaker 6. The second shaking table 7 is configured to slide only in the direction of vibration of the second shaker 6 by being installed on the base 20. Note that, as described above, the first shaker 2 and the second shaker 6 have the same direction of vibration, and therefore the second shake table 7 includes vibrations from the first shaker 2. Then, a vibration obtained by synthesizing the vibration in the second shaker 6 acts, and the specimen 21 placed on the second vibration table 7 has the first shaker 2 and the second shaker 6. It is possible to give acceleration and displacement that could not be obtained when a single was used.

  In the vibration test apparatus 1 having the above-described configuration, the second vibration table 7 is supported by the base 20 without the first vibration table 3, that is, the first vibration table 3 is the second vibration table 7 or the like. Since the configuration does not bear the weight of the specimen 21, the first shaking table 3 and the first sliding mechanism 5 are provided as in the conventional vibration testing apparatus that is configured by simply stacking a plurality of excitation mechanisms. There is no need to be robust. Therefore, the first shaking table 3 and the first sliding mechanism 5 can be reduced in size and weight, and the manufacturing cost can be reduced. Further, by reducing the weight of the first shaking table 3, the capacity required for the first shaker 2 is reduced correspondingly, and the first shaker 2 is reduced in size, the introduction cost is reduced, and the operation is further performed. Cost can be reduced. If the second shaking table 7 is simply supported on the base 20, the second shaking table 7 and the second shaking table 6 are connected to the second shaking table 6 from the connecting portion between the second shaking table 7 and the second shaking table 6. Although the weight of the specimen 21 may be transmitted, the second vibrator 6 is an electrodynamic vibrator, and the outer cylinder 30 and the inner cylinder 33 of the second vibrator 6 are not in contact with each other. Therefore, the outer cylinder 30 of the second vibration exciter 6 and the second vibration table 7 are separated from each other, and the second vibration table 7 and the second vibration table 7 to the second vibration exciter 6 side are separated. Transmission of the weight of the specimen 21 does not occur.

  In order to more reliably prevent the transmission of the weight of the second shaking table 7 and the specimen 21 to the second shaker 6 side, the inner cylinder 33 of the second shaking table 6 and the second shaking table 7 Between them, a connecting means 10 that transmits a horizontal displacement and does not transmit a vertical displacement may be interposed. As this type of connecting means 10, for example, as shown in FIG. 3, a pair of connecting pieces 41, 41, which are formed in a substantially comb-like shape by concavities and convexities formed continuously, are made to face each other, and on one side The convex portion 43 of the connecting piece 41 on the other side is inserted into the concave portion 42 of the connecting piece 41, and the convex portion 43 of the connecting piece 41 on the one side is inserted into the concave portion 42 of the connecting piece 41 on the other side. There are joints that are made. In this joint, since the comb teeth are arranged in the connected state, and the direction orthogonal to the comb teeth arranged in the non-connected state, the comb teeth arranged in the second vibrator 6 The second shaking table toward the second shaker 6 side by interposing between the inner cylinder 33 of the second shaker 6 and the second shaking table 7 so as to match the excitation direction of the second shaking table 6 7 and the transmission of the weight of the specimen 21 can be more reliably prevented.

  Next, different embodiments of the vibration test apparatus of the present invention will be described in detail with reference to FIG. FIG. 4 is a front view showing an outline of the vibration testing apparatus 50 according to the second embodiment. As shown in FIG. 4, the vibration test apparatus 50 according to the second embodiment includes a third vibration mechanism configured by a third vibration table 11 and a third vibration table 12 below the second vibration table 7. 13 is different from the first embodiment in that 13 is provided.

  The third shaker 11 is an electrodynamic shaker having the same configuration as the first and second shakers 2 and 6, and is attached to the base 20 so that the excitation direction is in the vertical direction. It is supported. The third shaking table 12 is connected to the inner cylinder 33 side.

  As shown in FIG. 4, the third vibration table 12 supports the second vibration table 7 via the second sliding mechanism 9. Therefore, the specimen 21 placed on the second shaking table 7 has a vertical vibration from the third vibrator 11 in addition to the horizontal vibration from the first and second vibrators 2 and 6. Vibration will be given. In addition, since the vibration of the vertical direction from the 3rd shaker 11 will vibrate the 2nd shake table 7 to an up-down direction, between the 2nd shake table 7 and the 2nd shaker 6, A connecting means 10 that does not transmit vibration in the vertical direction is interposed. The specific configuration of the connecting means 10 is the same as that shown in FIG. 3, but is not limited to this. For example, the linear guides used in the first and second sliding mechanisms 5 and 9 may be used. Further, various known connecting means may be used.

  In the vibration test apparatus 50 having the above-described configuration, the second vibration table 7 is supported by the base 20 without the first vibration table 3 in the same manner as the vibration test machine 1 of the first embodiment. The size and weight of the base 3 and the first sliding mechanism 5 can be reduced, and the manufacturing cost can be reduced, and the first vibrator 2 can be reduced in size, introduction cost, and operation cost. Is also possible. Further, in the vibration test apparatus 50, the third vibration table 12 supports the second vibration table 7 in a state independent of the first and second vibrators 2, 6 and the first vibration table 3. In other words, since the third shaking table 12 is configured not to bear the weight of the first and second vibrators 2 and 6 and the first shaking table 3, the third shaking table 12 and the third shaking table 12 are provided. The enlargement of the machine 11 can be avoided, and the apparatus can be downsized and the manufacturing cost can be reduced while realizing multi-axis excitation.

  Although specific embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the present invention. For example, in the above-described embodiment, an electrodynamic exciter is used as the exciter. In the 2nd shaker 6, by using an electrodynamic type shaker, the effect | action that the outer cylinder 30 of the 2nd shaker 6 and the 2nd vibration stand 7 can be made non-contact is acquired. However, if the connecting means 10 that does not transmit the displacement in the specific direction is interposed between the second shaking table 7 and the same action is obtained, it is not necessary to limit to the electrodynamic exciter. Moreover, although the exciting direction of the 1st, 2nd vibrator 2 and 6 was made into the horizontal direction, it is good not only as this but arbitrary directions, such as a perpendicular direction. Further, in the above embodiment, linear guides having a limited moving direction are used as the sliding mechanisms 5 and 9, but the invention is not limited to this, and various known publicly known ball bearings and the like whose moving directions are not limited are used. A sliding mechanism may be used. For example, if the second sliding mechanism 9 that supports the second shaking table 7 is replaced with a ball bearing or the like whose movement direction is not limited, a new vibrator for vibrating the second shaking table 7 is provided. It is also possible to provide a more multi-axis vibration test apparatus.

1, 50 ··· Vibration test device 2 ··· First shaker 3 ··· First shake table 4 ··· First shake mechanism 5 ··· First slide mechanism 6 ··· Second adder 2. Shaking machine, 7. Second shaking table, 8. Second shaking mechanism, 9. Second sliding mechanism, 10. Connecting means, 12. Third shaking table, 20. Base

Claims (6)

  The first shaker (2) and the first shaker (3) vibrated by the first shaker (2) constitute a first shaker mechanism (4), and the first shaker The second vibrator (6) attached to (3) and the second shaking table (7) vibrated by the second vibrator (6) constitute a second vibrator mechanism (8). Thus, a vibration test apparatus that vibrates the second shaking table (7) in a specific direction by both the first shaker (2) and the second shaker (6), wherein The vibrator (2) is supported by the base (20), the first vibrating table (3) is supported by the base (20) via the first sliding mechanism (5), and further the second vibration The vibration test apparatus characterized in that the base (7) is supported by the base (20) via the second sliding mechanism (9) without passing through the first vibration base (3).   The first shaker (2) and the first shaker (3) vibrated by the first shaker (2) constitute a first shaker mechanism (4), and the first shaker The second vibrator (6) attached to (3) and the second shaking table (7) vibrated by the second vibrator (6) constitute a second vibrator mechanism (8). Thus, a vibration test apparatus that vibrates the second shaking table (7) in a specific direction by both the first shaker (2) and the second shaker (6), wherein The vibrator (2) is supported by the base (20), the first vibrating table (3) is supported by the base (20) via the first sliding mechanism (5), and further the second vibration The table (7) does not go through the first vibration table (3), and the third vibration table (12) that is vibrated in another direction orthogonal to the specific direction and the second sliding mechanism (9) ) And base (2) ) That is supported by the vibration testing apparatus according to claim.   The said 2nd shaker (6) and the 2nd shaking table (7) are connected by the connection means (10) which transmits the displacement only of the said specific direction, The Claim 1 or Claim characterized by the above-mentioned. 2. The vibration test apparatus according to 2.   The vibration test apparatus according to any one of claims 1 to 3, wherein the second shaker (6) is an electrodynamic shaker.   The vibration test according to any one of claims 1 to 4, wherein the second shaker (6) outputs a higher frequency and smaller displacement than the first shaker (2). apparatus.   6. The vibration test apparatus according to claim 1, wherein the specific direction is a horizontal direction.