A ground vibration test fixture for large space vehicles

Abstract

The invention provides a ground vibration test clamp used for a large-scale spacecraft. The clamp adopts a cylindrical structure, and is used to switch an interface of a tested product from a horizontal direction to a vertical direction. The clamp adopts a split form, and comprises an upper clamp and a lower clamp, and the weight of the clamp is reduced, and the first order resonant frequency of the clamp is 220 Hz. The ground vibration test clamp has advantages of high structural strength, large rigidity, strong bearing capability, uniform response, low production costs, strong adaptability, and abilities of solving technical difficulties of design of large-scale vibration test clamp and achieving good economic effect.

Description

technical field [0001] The invention relates to a ground vibration test fixture for a large space vehicle, especially a vibration test fixture with complex interfaces. Background technique [0002] Vibration test is an important part of environmental test, and fixture plays an extremely important role in vibration test. The vibration test fixture transmits the vibration energy of the mechanical connection to the test piece from the vibration table, and it cannot be distorted during the energy transmission process. In the entire test frequency range of the vibration table, it is difficult to transmit the vibration energy of the moving coil to the table without distortion. Unreasonable fixture design, manufacture, installation and use are prone to "overvibration" and "undervibration". Even if the requirements of the control system are barely met, the load on the control system will be increased, especially when the dynamic response range of the vibration table is small. Cont...

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Problems solved by technology

[0003] For above-mentioned defective in the prior art, the purpose of the present invention is to provide a kind of fixture that is used for ground vibration test of large-scale space vehicle, has solved test product size and is big, and the space vehicle vibration test fixture structural intensity of interface complex is low, rigidity is weak, one Low order frequency, large mass and other defects, the split columnar form is adopted, which can effectively reduce the quality of the fixture and improve the rigidity of the fixture without increasing the height, making the fixture safe and reliable during the vibration test

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