我在用ansys求解一个转台中框静力问题,网格是在hypermesh中划的,然后用mpc使内框轴与轴承共节点,轴承与外框共节点,加载时内框只加了重力(此重力给中框一个压力),中框加了重力,和扭矩,在求解时怎么显示非线性求解呀?而且中途显示错误:a term of constraint equation 121 is not defined,most likely due to a displacement constraint or an adjoining constraint equation!这是怎么回事呀,请帮忙指点指点!谢谢了!