摘要: |
对两种发射箱单独进行XYZ三方向上的正弦扫频实验,得到两种发射箱的共振频率及振幅放大倍数,并根据单自由度振动模型方程解出两种发射箱XYZ三个方向上的振动参数。再建立双发射箱刚体连接振动模型,解出两个连接后发射箱新的频率、振幅与连接件刚度、阻尼的关系。最后,通过制定寻优目标,最大程度减小两箱的共振振幅,解出两箱中间连接件的弹性系数及阻尼系数。将优化后的计算结果与两箱未连接时比较,取得明显减小共振振幅的效果。 |
关键词: 刚体;连接;减振 |
基金项目: |
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Joint Vibration Reduction Analysis of Double Rigid Bodies |
Zhang Qingqing Jiang Xueqi Niu Xinyu Wang Huijun Wang Xuelin Wen Weiwei Liang Menghan
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Shanghai Aerospace Equipments Manufacturer Co., Ltd., Shanghai 200245
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Abstract: |
The resonance frequency and amplitude amplification factor are obtained by sinusoidal sweeping experiments in XYZ direction of the two launch canisters. By substituting the experimental data into the single-degree-of freedom vibration equation, get the vibration parameters of two launch canisters in XYZ directions. Then the vibration model of two rigid bodies is established, and the relationship between the new frequencies and amplitudes of two rigid bodies and the stiffness and damping of the joints is solved. Finally, the elastic and damp coefficients of the joints are solved by setting the optimum objective of minimizing the amplitude. Comparing the final calculation results with those without connection, the obvious effect of reducing the amplitude is achieved. |
Key words: rigid body;connect;vibration reduction |