The center of mass of a system is defined as follows: I have here some kind of an object not just a point mass, but it has a finite size.
系统的重心,是这样定义的：,我有一个物体,不是有棱角的物体，但它大小有限。
2
Firstly, the influence of width of water body and height of water level to vibration property of structure was calculated, according to the finite field addition mass method.
首先，按有限域内附加质量方法计算了不同水体宽度、不同水位高度等对结构自振特性的影响。
3
A finite element method is presented to determine the steady state elastic responses of planar mechanisms with distributed mass, operating at a prescribed input rotary speed.