论文部分内容阅读
针对船用复合材料螺旋桨叶片,分别采用壳单元赋予不同截面参数和实体单元赋予不同等效材料参数两种建模方法进行了有限元分析,对比了壳单元和实体单元模型的模态、均布压力载荷下的响应以及均匀温度场中的热变形。结果表明:对于从桨根到桨尖各位置铺层不同的叶片来说,两种建模方法在建模时间和铺层调整便捷性方面各有利弊;模态分析中两种模型的固有频率和振型计算结果存在一定差异,它们均可在一定条件下用于复合材料螺旋桨叶片模态计算;两种模型中,模拟均布压力载荷下的响应时应采用壳单元模型,而分析叶片在均匀温度场中结构的热变形应采用实体单元模型。
For the marine composite propeller blades, finite element analysis was conducted by using two different modeling methods of different cross-section parameters assigned by shell elements and different equivalent material parameters by solid elements respectively. The modal and uniform distribution of shell element and solid element model were compared. The response under load and thermal deformation in a uniform temperature field. The results show that both modeling methods have their advantages and disadvantages in terms of modeling time and ease of ply adjustment for blades with different plies from the root to the tip of the blade. The natural frequencies of the two models in the modal analysis And the modal calculation results are different, they can be used under certain conditions for composite propeller blade modal calculation; in both models, the shell element model should be used to simulate the response under uniform pressure load, The thermal deformation of the structure in uniform temperature field should adopt solid element model.