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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 intervals are numerically studied with different viscosity-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.
Key words: Fluid damper Temperature-dependent viscosity Vibration isolation
CLC No: V414.1 TK124
国防科工委“十•五”民用航天预研资助项目. Received 20060911, received in revised form 20070608
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