Time domain dynamics response, frequency response function and root mean square value are taken to evaluate the vibration influence on the light-beam propagation performance quantitatively.

提出了将时域动态响应、频率响应函数和均方根值作为机械振动对光束传输性能影响的定量评价值。

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The viscosity of LDPE melt decreases in vibration force field and has a minimum value with vibration frequency change.

在振动力场作用下ldpe熔体的粘度减小，随振动频率的变化有一最小值。

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These results show that the vibration of control valve rod depends on if its frequency and one of dynamic pressure pulse is same but not the magnitude of pulse value.

测试结果表明，调节阀处于不稳定工作状态即阀杆振动工况取决于脉动压力与阀杆固频率是否同频，并非其脉动压力值大小；

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