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首先介绍了某复合材料主桨叶疲劳试验提前破坏情况,并从结构设计、制造质量和试验方法三个方面进行分析,最终找出了试验载荷超过了桨叶过渡段后缘抗屈曲能力是此次疲劳试验提前失效的主要原因,另外摆振刚度突变和模压桨叶质量差是导致在1000剖面附近开胶的重要原因。在第二次疲劳试验时,通过改进桨叶结构和制造工艺,调整试验载荷,最终获得了疲劳试验验证。
Firstly, the fatigue failure of a composite main blade is introduced in advance, and the structural design, manufacturing quality and test methods are analyzed in three aspects. Finally, it is found that the test load exceeds the trailing edge of the blade transition buckling resistance Sub-fatigue test in advance the main reason for the failure, in addition to sudden changes in the vibration stiffness and molded poor blade quality is leading to an important reason to open plastic near the 1000 profile. In the second fatigue test, the fatigue test was finally verified by improving the blade structure and manufacturing process, adjusting the test load.