Hoisting device of horizontal modality test

Abstract

A hoisting device of a horizontal modality test comprises a modality test flotation hoisting device and a modality test weight-loss device, wherein the modality test flotation hoisting device comprises a flotation ring installing board, a flotation ring, a flotation flat board, a rope clamping component and a burden-reducing handing pillar, and the modality test weight-loss device comprises linear sliding rails, a sliding block, a spring scale, channel steel and a support frame. The modality test weight-loss device is installed above the modality test flotation hoisting device through the support frame. The support frame is fixed with a base of a main machine through connecting pieces. The linear sliding rails are fixed with the support frame and are parallel with a linear guide rail in the modality test flotation hoisting device. Sliding blocks of a left linear sliding rail and a right linear sliding rail are connected through the channel steel. One end of the spring scale is hung on the burden-reducing handing pillar in a hooked mode, and the other end of the spring scale is connected with the channel steel and is kept in a vertical state. The sliding block is in linkage with heels of the channel steel and the flotation ring installing board. According to the hoisting device of the horizontal modality test, plane motion is basically unconfined, and free of effects of friction, inertia force and gravity of tested pieces.

Description

technical field [0001] The invention relates to the field of modal tests, in particular to a modal test hanging device in the horizontal direction. Background technique [0002] With the rapid development of aerospace technology, the demand for low-frequency and ultra-low frequency modal test analysis is increasing. In order to have accurate modal parameters for reference in the design of the spacecraft to avoid unnecessary errors such as resonance, it is necessary to conduct modal analysis tests on the spacecraft. The modal analysis test tests the dynamic characteristics, natural frequency, mode shape and damping, generalized mass, generalized stiffness, etc. [0003] Weightlessness is a main feature of the space environment. For modal tests in the vertical direction, it is a generally accepted principle that the rigid body motion frequency in the vertical direction of the suspension device should be an order of magnitude lower than the fundamental frequency of the specime...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the shortcomings of the existing modal test hanging device that cannot solve the method of horizontal modal test suspension, the present invention provides a plane movement that is basically unconstrained, has no friction and inertial force, and is not affected by the gravity of the test piece. The modal test setup in the horizontal direction of

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