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弹性体模拟(弹性力学)
2022-07-21 10:01:00 【qq_43133135】
弹性力学。。。。。忘了。。。。不过没事,物理强如我,手推吧
弹力
初中学过胡克定律 F=-kx ,根据下图所示,就变成 F = k ( y − l ) F=k(y-l) F=k(y−l),其中L是平衡位置
如果只有弹簧,那给了一个力就会一直震荡,我们假设有空气阻力F2(和速度方向相反),且阻力系数为c,则有受力图如下,且 F 2 = c × v 2 F_2=c\times v^2 F2=c×v2:
得到合力 F = k × ( y − l ) − c × v 2 F=k\times(y-l)-c\times v^2 F=k×(y−l)−c×v2,假设质点质量m,则有运动加速度a=F/m
二维弹性体
只考虑中间那个物体,受力方向由4个二维的点决定
然后写成向量式就可以了,后面就很简单了,不推导了
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