| 流体阻尼器粘性发热对整星隔振的影响 |
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| 引用本文： | 何玲,杨庆俊,郑钢铁. 流体阻尼器粘性发热对整星隔振的影响[J]. 机械工程学报, 2007, 43(9): 61-64 |
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| 作者姓名： | 何玲 杨庆俊 郑钢铁 |
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| 作者单位： | 哈尔滨工业大学航天学院,哈尔滨,150001;清华大学航天航空学院,北京,100084 |
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| 基金项目： | 国防科工委民用航天技术预先研究项目 |
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| 摘 要： | 在航天器发射过程中，流体粘度随温度变化而改变，流体阻尼器具有不同的阻尼比和共振频率。结合流体阻尼器在整星隔振中的应用，建立发射阶段的热动力学模型。通过数值模拟比较不同粘温系数、不同阻尼器参数下的整星隔振秒特性，并对粘性发热的作用进行了试验研究。理论分析和试验表明，随着时间的推移，阻尼器温度升高，隔振系统的共振频率发生偏移，共振峰值发生变化。
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| 关 键 词： | 流体阻尼器 粘温特性 隔振 |
| 修稿时间： | 2006-09-11 |
EFFECT OF VISCOUS HEATING OF THE FLUID DAMPER ON THE WHOLE-SPACECRAFT VIBRATION ISOLATION |
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| HE Ling,YANG Qingjun,ZHENG Gangtie. EFFECT OF VISCOUS HEATING OF THE FLUID DAMPER ON THE WHOLE-SPACECRAFT VIBRATION ISOLATION[J]. Chinese Journal of Mechanical Engineering, 2007, 43(9): 61-64 |
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| Authors: | HE Ling YANG Qingjun ZHENG Gangtie |
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| Affiliation: | School of Astronautics, Harbin Institute of Technology School of Aerospace, Tsinghua University |
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| Abstract: | During a launch mission, the fluid damper has different damping coefficient and resonance frequency for the fluid viscosity is a function of the fluid temperature. A thermo-dynamic model is established by considering the application of the fluid damper in the whole-spacecraft vibration isolation. And the frequency domain performances of the whole-spacecraft vibration isolation systems at some time in-tervals are numerically studied with different viscos-ity-temperature coefficients and different parameters. The theoretical analysis and experimental results show that with the past of the time, the temperature of the damper increased, and thus resulted in a shift of the resonance frequency and the changes of the resonance amplitude. |
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| Keywords: | Fluid damper Temperature-dependent viscosity Vibration isolation |
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