警告形式
A reference moment value times the tolerance is used by the
Newton-Raphson method for checking convergence. The calculated
reference MOMENT CONVERGENCE VALUE = 9.763312579E-04 is less than a
threshold. This threshold defaults to 1.0-2 or is specified as MINREF
on the CNVTOL command. Check results carefully.
意思就是你的收敛值比收敛准则最小值还小,结果虽然收敛,但是误差可能很大,设置个小的MINREF有助于提高精度。 这个警告可以忽略,如果计算不收敛应该不是这个问题引起的。如果想要避免这个警告,可以试试在求解前执行如下命令:
cnvtol, M, -1, , 2, -1
cnvtol, F, , , 2, -1