本文提出质点和质点系(绝对运动和相对运动)质量加速度矩定理。
This paper proposes the theorem of moment about mass acceleration of the particle and the system of particles (absolute motion and relative motion).
通过计算质量分布均匀的球壳对一质点的引力，验证了平方反比关系的重要结果。
The important result of the relation of the inverse ratio of square through calculating the gravitation of a ball shell with uniformly-distributed mass on a particle.
通过对两特性参数的影响因素质量和刚度的分析，得出了一些有益的结论，对深入理解多质点弹性体系的地震反应有很大帮助。
With the analysis of the influent factors of the parameter, useful conclusions was given, which can help to understand the seismic response of multi-mass elastic system.
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