论文部分内容阅读
本文分析了无界面子结构模态综合法的特点,考虑子结构之间相互动力影响,提出一种直接对子结构低阶模态组成的Rjtz减缩基进行修正的改进方案。引入了无界面补偿模态,以补偿被截去的子结构高阶模态的影响;引入了补偿子结构,以提高补偿效果和减缩效果。算例表明,与原无界面法相比,改进的无界面子结构方法具有精度高、计算量小,减缩效果好等优点。
In this paper, the characteristics of the modal synthesis method without interface substructure are analyzed. Considering the mutual dynamic effects between the substructures, an improved scheme is proposed to directly modify the Rjtz subtraction bases of the submode low-order modes. The interface-free compensation mode was introduced to compensate for the effects of the higher-order modes of the truncated substructure. The compensation substructure was introduced to improve the compensation and reduction effects. The example shows that the improved interfaceless substructure method has many advantages such as high accuracy, low computational complexity, and good reduction in shrinkage compared with the original interfaceless method.