（1）.Automatic stabilization
(2).Unsymmetric solver
(3).General solution controls(成倍地增加5-10)
（4）.Contact controls(数值采用默认就可以)
（5）.Contact property
（6）use surface to surface finite sliding (7) apply a small friction (0.02)
15.按照步数来查看结果
16.对称算法与非对称算法
（1）.Automatic stabilization
(2).Unsymmetric solver
(3).General solution controls(成倍地增加5-10)
（4）.Contact controls(数值采用默认就可以)
（5）.Contact property
（6）use surface to surface finite sliding (7) apply a small friction (0.02)
15.按照步数来查看结果
16.对称算法与非对称算法