On the basis of analysis of previous mechanical models, a multi degree model with a distributedmass is established.
在分析研究现在常用力学模型的基础上，建立了多自由度分布质量模型。
2
In order to take into account the distributedmass along the stories of structure, equation of motion is given in the local coordinates of the story.
考虑层间结构分布质量及楼层处集中质量，在层局部坐标中建立运动微分方程。
3
The important result of the relation of the inverse ratio of square through calculating the gravitation of a ball shell with uniformly-distributedmass on a particle.