全尺寸垫升风机复合材料叶片疲劳试验加载技术研究

Research on Loading Technology of Fatigue Testing for Full-Size Composite Lift Fan

随着我国船舶业的飞速发展,垫升船的发展越来越受到重视。风机叶片是垫升船重要组成部分,复合材料风机叶片正处在国产化的重要阶段。因此,亟待开展针对全尺寸级复合材料风机叶片的强度试验、疲劳试验的方法研究工作。本文首先通过调研分析,提出了适用于此试验的有效的加载方式,然后针对异形曲面夹持结构合理设计,并提出切面平行法,解决了传统夹持结构设计方法不适用的问题。开展了连接结构设计和布局的分析研究,通过有限元分析,优化加载布局设计方案。最后,应用此项加载技术准确、高效完成了全尺寸级叶片强度试验和疲劳试验,验证了加载技术的合理性与可靠性,为全复合材料垫升风机叶片设计研究提供了支撑。

With the continuous development of shipping industry in China, air cushion vehicle has become more important. Lift fan is one of the key parts of a air cushion vehicle. Now, it’s an important stage of indigenization to composite lift fan. Therefore, it is necessary to carry out researching on a method of the mechanical tests for full-size composite lift fan. Firstly, an efficient loading technology of strength tests and fatigue tests for full-size composite lift fan is presented. An efficient method of gripping constructs for special-shaped surface is presented. Parallel tangent plane method is presented to solve the problem of the traditional method. The optimization program of connation constructs is analyzed by finite element analysis. Lastly, according to the loading technology, a strength test and a fatigue test is made. The results of this experiment shows that this test method can complete the full-size composite lift fan mechanical test accurately and efficiently, and also shows the rationality of this test method. It provides help for the development of composite lift fan.