将一个桁架结构的机构的有限元模型转化为MNF格式,作为柔性体导入ADMAS。在转化的过程中ANSYS提示“the number of modes expected (18) does not match the number found (8). most likely, the medel has errors or there were more modes requsted than ecist. please review the prior modal solution for watnings”,哪位高手能帮解决一下