*** USER FATAL MESSAGE 3046 (SQFREQ)
THIS FREQUENCY RESPONSE ANALYSIS HAS NO EXCITATION SPECIFIED FOR IT.
APPLIED LOADS AND ENFORCED MOTION ARE BOTH NULL.
THE RESULT WILL THEREFORE BE A ZERO SOLUTION.
按照patran 2010入门到精通中例子一步步做的,最后出现这个问题,真心不知错在哪,有知道的吗?