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支臂是直升机球柔性桨毂中的典型复杂动部件,疲劳破坏为主要的失效模式。结合某直升机支臂疲劳试验,介绍了试验方案设计、试验实施方案设计及试验数据分析等内容和方法。考虑支臂结构及载荷和组合试验的特点,疲劳试验载荷的比例以模拟载荷分布为原则、以打样设计载荷为手段确定,载荷大小根据试验件的疲劳能力、寿命考核要求、各破坏部位和模式匹配考核确定;试验采取整体试验和局部考核相结合的方法,设计了由支臂和模拟桨叶组成的双铰支梁式支臂整体疲劳试验实施模型;试验监测数据分析有力地保证了试验的有效性。
The arm is a typical complex moving part in the helicopter ball flexible hub. The fatigue failure is the main failure mode. Combined with the fatigue test of a helicopter arm, this paper introduces the design of the test plan, the design of the test plan and the analysis of the test data. Considering the characteristics of arm structure and load and combination test, the proportion of fatigue test load is based on the principle of simulated load distribution and the load of proofing design. The load size is determined according to the fatigue capacity, life assessment requirements, Matching test to determine the test to take the overall test and local assessment of a combination of methods designed by the support arm and the simulation blade double hinged support beam integral fatigue test implementation model; test monitoring data analysis strongly guarantee the test Effectiveness.