lumped mass

In the analysis for the interaction between soil and structures, the calculated models for the finite soil, the semi infinite soil and the sliding base isolated building are established using a method considering with the finite element, the infinite element and the lumped mass system.

在土结构相互作用分析中，分别采用有限元、无穷元和集中质点体系建立了衬砌周围的有限土区、四周的无限土区以及基底滑移隔震建筑的计算模型；

A two-dimensional lumped mass dynamic model is then reduced from the model when incorporating several assumptions.

在此基础上,基于几个基本假设由三维模型缩聚形成二维串联多自由度动力模型.

Simplifying the rotor system with the lumped mass method.

首先，利用集中质量法将转子系统离散。

This dissertation mainly used lumped mass method to analyze the dynamic characteristics of the mechanism.

论文主要采用集中质量法对滚珠型弧面分度凸轮机构进行动力学分析。

Then, using the second-order central difference to discretize the time derivative of the displacement, and applying the quadrature formula to the mass matrix, a fully discrete lumped mass Morley element method is developed for the same problem.

然后利用中心差分格式离散时间方向的二阶导数，再利用适当的求积公式得到薄板弯曲问题的集中质量Morley元全离散格式。