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A passive vibration reduction method for a space science experiment cabinet

A technology of space science and experimental cabinets, applied in instruments, geometric CAD, calculations, etc., can solve problems such as inaccurate finite element modeling and simulation, and achieve the goals of improving dynamic environment, small changes, and improving comprehensive performance indicators and reliability Effect

Active Publication Date: 2019-03-08
SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI
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  • Claims
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Problems solved by technology

[0005] Correct the finite element model with the data obtained from a small amount of structural tests to obtain a more accurate finite element model, which solves the problem of inaccurate finite element modeling and simulation

Method used

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  • A passive vibration reduction method for a space science experiment cabinet
  • A passive vibration reduction method for a space science experiment cabinet
  • A passive vibration reduction method for a space science experiment cabinet

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Experimental program
Comparison scheme
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Embodiment

[0032] The invention aims at adopting the passive vibration reduction of the constrained damping layer for a scientific experiment cabinet in a certain space.

[0033] figure 2 It is a structural diagram of the space science experiment cabinet.

[0034] The space science experiment cabinet is mainly composed of a cabinet metal frame structure and internal scientific loads, and the entire metal frame is surrounded by a skin.

[0035] Firstly, the finite element simulation model of the space science experiment cabinet is established in the pre- and post-processing software Hypermesh. The whole structure is simplified into solid, shell and lumped mass units, and the RBE2 rigid unit is used to simulate the bolt connection, and the XYZ of the experimental cabinet are respectively analyzed by MSC.Nastran The sinusoidal response analysis was carried out in three directions (the global damping ratio was taken as 0.05), and the acceleration response cloud images of the whole and each...

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Abstract

The invention relates to a passive vibration reduction method of a space science experiment cabinet, which comprises the following steps of establishing a finite element simulation model of the spacescience experiment cabinet in pretreatment software, and carrying out sine sweep frequency analysis and solution to obtain acceleration response results of the whole and each component; obtaining theenergy distribution of the whole cabinet and each component on a resonant frequency point; laying a constraint damping layer at the position with large modal strain energy of the key assembly; and carrying out the sinusoidal sweep frequency analysis solution on the space science experiment cabinet after the damping vibration attenuation is laid, compairing the change conditions of structure responses before and after the additional constraint damping layer, and verifying the reliability of the passive vibration attenuation method. According to the passive vibration reduction method for the space science experiment cabinet, the existing structure does not need to be changed, the structural function of the cabinet body is not affected, the dynamic environment of instruments, equipment and effective loads is improved to a certain extent, the comprehensive performance index of the experiment cabinet is improved, and the method is high in reliability and high in robustness and is easy to achieve.

Description

technical field [0001] The invention relates to the field of aerospace constrained damping vibration reduction design, in particular to a passive vibration reduction method for a space science experiment cabinet. Background technique [0002] Vibration is a mechanical problem often encountered in the development of aerospace system structures. If it is not handled properly, the vibration environment of the structure is too harsh, or resonance occurs, which will lead to instrument failure or even catastrophic consequences. Therefore, the vibration reduction technology of the structure is a very critical factor for the development of aerospace system products. [0003] In the second phase of manned spaceflight, my country will develop short-term manned space laboratories and carry out a series of space science experiments. In order to build a laboratory, the launch vehicle will carry multiple space science experiment cabinets to improve the space laboratory and meet the requi...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/17G06F2119/06G06F30/23Y02T90/00
Inventor 富佳骆海涛轿利闯
Owner SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI
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