结构对称性在活塞有限元模态分析中的应用

Application of Symmetry of the Structure in Finite Element Modal Analysis of the Piston

介绍了有限元中求解固有频率的方法及利用结构的对称性求解有限元问题的原理,利用此方法对活塞进行模态分析,降低了有限元模型的规模,不仅节省计算时间,而且提高了所求解的固有频率精度.

The method of solving inherent frequency in the finite element is introduced.The principle of solving finite element problems using symmetry of the structure is also expounded.And the mode of piston is analyzed using this method.The result shows that this method can reduce the scale of the finite element model,and save the time of calculating.The inherent frequency calculated is accurate,too.