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基于铺覆模拟的复合材料螺旋桨叶片实体有限元建模分析
李雪芹1,陈科2,郭双喜1
1.航空工业复合材料技术中心,中航复合材料有限责任公司,先进复合材料重点实验室,北京 101300;2.海军研究院,北京 100161
摘要:
为了评估复合材料螺旋桨叶片在铺覆时纤维取向改变对性能的影响,基于Fibersim软件的铺覆模拟结果建立了复合材料螺旋桨叶片的实体有限元模型,并与不考虑纤维取向改变时的有限元计算结果进行对比。结果表明:不考虑纤维取向改变时叶片固有频率及均布压力下最大位移误差小于5%,但热载荷下考虑真实纤维方向时的最大变形量约为不考虑真实纤维方向时的2倍,叶片局部区域0°、45°、-45°方向铺层的纤维角度偏差超过了25°。在进行复合材料螺旋桨叶片有限元分析时应基于铺覆后的真实纤维方向。
关键词:  螺旋桨叶片  复合材料  铺覆模拟  实体单元  有限元建模
DOI:10.12044/j.issn.1007-2330.2020.01.004
分类号:TB332
基金项目:国家重点研发计划资助(2017YFB0703300)
Solid Finite Elements Modeling of Composite Propeller Blade Based on Draping Simulation
LI Xueqin1,CHEN Ke2,GUO Shuangxi1
1.AVIC Composite Technology Center,AVIC Composite Corporation LTD, National Key Laboratory of Advanced Composites,Beijing 101300;2.Naval Research Academy,PLA,Beijing 100161
Abstract:
In order to evaluate the effect of fiber direction deviation on the performance of composite propeller blades,a solid finite elements model was established based on the results of the draping simulation with Fibersim software.The FEM analysis results considering fiber direction deviation was compared with the results ignoring fiber direction deviation.The results show that the errors of natural frequencies and maximum deformation under uniformly distributed pressure are less than 5% while ignoring fiber direction deviation.But the maximum deformation under distributed temperature field of considering fiber direction deviation is about 2 times of that of ignoring it.Fiber direction deviations of the 0°,45°,and -45° plies exceed 25° in partial area of the blade.The FEM analysis of composite propeller blades should be based on the true fiber direction after draping.
Key words:  Marine propeller blade  Composite  Draping simulation  Solid elements  Finite elements modeling