【摘要】 力限振动试验可以缓解传统加速度控制振动试验在试验件共振频率处产生的振动"过试验"现象。计算力限条件是进行力限振动试验的前提。介绍了力限振动试验的基本原理,给出了计算力限条件的基本过程,采用二自由度系统模型详细推导了半经验系数的计算方法,基于此方法计算了某航天器有效载荷力限随机振动试验的力限条件。结果显示,该方法可合理确定力限振动试验的力限条件。更多还原

【Abstract】 The force limited vibration test can alleviate the over-testing phenomenon generated by the resonant frequency in the acceleration-controlled vibration test.Force specification estimation is a prerequisite for the force limited vibration test.The principle of force limited vibration test was introduced.And the calculation method for semi-empirical coefficient was derived by the two degree of freedom system.Furthermore,the force specification of some spacecraft payload was caculated in the random vibration test.The results show that this method is reasonable to estimate the force specification.更多还原