求教大家大变形的问题！

我想模拟埋地管道在滑坡作用下的变形问题，可是总是不收敛。提示1230 elements are distorted. Either the isoparametric angles are out of the suggested limits or the triangular or tetrahedral quality measure is bad. The elements have been identified in element set WarnElemDistorted.还有这个The plasticity/creep/connector friction algorithm did not converge at 275 points。
请大家指教啊