Vibrating structure infinite boundary simulation device

Abstract

The invention provides a vibrating structure infinite boundary simulation device. The vibrating structure infinite boundary simulation device consists of rubber skin and dry sand grains, wherein the rubber skin adopts a hollow enclosed structure, and is filled with the dry sand grains; the rubber skin is provided with an opening of which the shape is the same as the section shape of a vibrating structure boundary under test; the vibrating structure boundary under test can be inserted into the rubber skin opening and extend into the rubber skin; and the vibrating structure boundary under test is tightly wrapped with the rubber skin and the dry sand particles inside. The vibrating structure infinite boundary simulation device provided by the invention has the advantages of easiness in manufacturing, simple process, low cost and remarkable vibration energy absorbing effect, and can greatly reduce the vibration wave reflecting effect at the boundary position of a test piece, simulate the vibrating structure infinite boundary conveniently and effectively, improve the test accuracy and lower the demand for the size of the test piece in simulating infinitely-large structure vibration testing.

Description

technical field [0001] The invention relates to the technical field of vibration tests, in particular to a vibration structure infinite boundary simulation device. Background technique [0002] In vibration tests, it is sometimes necessary to simulate infinite structures for testing, such as simulating vibration response tests of structures such as infinite rods, beams, and plates. Generally, large-scale specimens with free boundaries are used to approximate infinite structures to achieve test results. . This method is time-consuming and laborious, and the test cost is very high, which is not conducive to obtaining test results quickly. At the same time, no matter how large the test piece is, the reflection of the vibration wave will always occur at the boundary of the test piece, which violates the assumption that the infinite structure has no reflection boundary, resulting in large errors in the test results. How to effectively simulate infinite structures with a simple ...

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Problems solved by technology

[0003] The purpose of the present invention is to propose a vibration structure infinite boundary simulation device, which is used to solve the problem of vibration wave reflection at the boundary position of the test piece when using a finite size test piece to simulate an infinite structure for vibration testing, so that the boundary of the test piece is more accurate. Approaching the infinite boundary, improving the test accuracy, reducing the size of the required test piece and reducing the cost of the test

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