直升机旋翼/机身耦合系统模型导纳的测试研究

直升机旋翼和机身子系统以及其耦合系统的导纳是用动柔度匹配法确定直升机旋翼 /机身耦合系统固有频率必要的数据 ,我们已推导了它们的分析表达式 ,为验证分析表达式的可用性 ,须进行试验测试与研究。由于旋翼的转动 ,给实测带来困难 ,作为起步 ,从模型试验开始。本文介绍旋翼 /机身耦合系统模型及其子系统的导纳的测试方案、试验程序 ,综述以作者自行设计的旋翼 /机身耦合系统模型进行试验所得到的结果及其与理论计算结果的比较。结果表明 ,测试方案与试验方法是可行的 ,理论分析计算公式是正确的

Experimental Study on Acceleration Mobility Measurements for Rotor/Fuselage Coupled Model of Helicopter

The acceleration mobilities of rotor and fuselage subsystem and coupled system are key parameters for determining natural frequencies of the rotor/fuselage coupled system by using mobility matching method.We have deduced the analytical expressions.In order to verify the feasibilities of the expressions,it is necessary to measure those mobilities.But it is difficult to measure them because of the rotor rotation effects.Therefore,a model test,as an inltial step,is required.In this paper the test approaches and procedures for measuring the acceleration mobilities of rotor and fuselage subsystem and coupled system are introduced.The measured and calculated results for self designed rotor/fuselage model are summarized and compared.The results show that our test approaches and methods are feasible and analytical expressions are correct.