ansys14.0LS-DYNA里形成关键字文件时出现问题

ansys14.0LS-DYNA里形成关键字文件时出现问题提示no explicit dynamic material modal wasdefined for material 1 due to either missing material data or defining thematerial modal before setting the preferences for explicit dynamic analysis.piease check definition of materials for explicit dynamic analysis and redefinethe material model if necessary




不知道是怎么回事呀求各位大神帮助一下