【作者】 陈阳； 方勃； 周杰； 黄文虎；

【Author】 CHEN Yang FANG Bo ZHOU Jie HUANG Wen-hu (School of Astronautics,Harbin Institute of Technology,Harbin 150001,China)

【机构】 哈尔滨工业大学航天学院；

【摘要】 本文以整星隔振为背景,讨论锥壳型适配器阻尼层失效的原因,通过复刚度理论解析法及有限单元法对约束阻尼层进行建模分析,得出结构阻尼系数与阻尼层刚度有关的结论。计算表明,约束阻尼层受力状态是剪切与挤压的叠加,不是纯剪状态,所以阻尼消耗能量的能力受到限制。通过对锥壳适配器进行强迫振动分析,得出阻尼层受力状态不合理是锥壳适配器隔振效率低下的原因,改进阻尼设计可以使卫星发射更安全可靠。更多还原

【Abstract】 In this paper,taking the satellite vibrating isolation as the background, the invalid mechanism of the constrained layer damping(CLD) on the conical shell adapter is discussed.The model of CLD is analyzed by the analytical method and finite element method,and the conclusions that the CLD stiffness is related with the structure damping coefficient are obtained.Calculation results indicate that the stress status of the damping layer is that of shear and press superposing,not of the shear only.So the ability of the adapter to dissipate the energy is limited.The transmissibility proved that the irrational stress condition of damping layer is the reason that the vibrating isolation ratio is low.The simulation results indicated that the isolation efficiency of the improved adapter is better,and the satellite launch is safer and more reliable.更多还原