关于LS-DYNA炸药冲击起爆仿真出错

pygscaep

   我最近正在做LS-DYNA做飞片冲击起爆炸药仿真，其中飞片选用JOHNSON_COOK材料模型和GRUNEISEN状态方程，被发炸药选用ELASTIC_PLASTIC_HYDRO材料模型和IGNITION_AND_GROWTH_OF_REACTION_IN_HE状态方程。但是在仿真时候总是出现这样的错误：

S t o r a g e   a l l o c a t i o n   

Memory required to begin solution      :     1879064
Additional dynamically allocated memory:     1163915
                                   Total:     3042979

*** Error 40510 (SOL+510)
     complex sound speed in solid element # 65 cycle 0

*** Warning 40510 (SOL+510)
     complex sound speed in solid element # 66 cycle 0

*** Warning 40510 (SOL+510)
     complex sound speed in solid element # 67 cycle 0

*** Warning 40510 (SOL+510)
     complex sound speed in solid element # 68 cycle 0

*** Warning 40510 (SOL+510)
     complex sound speed in solid element # 69 cycle 0

*** Warning 40510 (SOL+510)
     complex sound speed in solid element # 70 cycle 0

*** Warning 40510 (SOL+510)
     complex sound speed in solid element # 71 cycle 0

*** Warning 40510 (SOL+510)
     complex sound speed in solid element # 72 cycle 0

*** Warning 40510 (SOL+510)
     complex sound speed in solid element # 73 cycle 0

*** Warning 40510 (SOL+510)
     complex sound speed in solid element # 74 cycle 0

*** Warning 40510 (SOL+510)
     complex sound speed in solid element # 75 cycle 0

*** Warning 40510 (SOL+510)
     complex sound speed in solid element # 76 cycle 0

*** Warning 40510 (SOL+510)
     complex sound speed in solid element # 77 cycle 0

*** Warning 40510 (SOL+510)
     complex sound speed in solid element # 78 cycle 0

*** Warning 40510 (SOL+510)
     complex sound speed in solid element # 79 cycle 0

*** Warning 40510 (SOL+510)
     complex sound speed in solid element # 80 cycle 0

*** Warning 40510 (SOL+510)
     complex sound speed in solid element # 81 cycle 0

*** Warning 40510 (SOL+510)
     complex sound speed in solid element # 82 cycle 0

*** Warning 40510 (SOL+510)
     complex sound speed in solid element # 83 cycle 0

*** Warning 40510 (SOL+510)
     complex sound speed in solid element # 84 cycle 0

*** Warning 40510 (SOL+510)
     complex sound speed in solid element # 85 cycle 0

*** Warning 40510 (SOL+510)
     complex sound speed in solid element # 86 cycle 0

*** Warning 40510 (SOL+510)
     complex sound speed in solid element # 87 cycle 0

*** Warning 40510 (SOL+510)
     complex sound speed in solid element # 88 cycle 0

*** Warning 40510 (SOL+510)
     complex sound speed in solid element # 89 cycle 0

*** Warning 40510 (SOL+510)
     complex sound speed in solid element # 90 cycle 0

*** Warning 40510 (SOL+510)
     complex sound speed in solid element # 91 cycle 0

*** Warning 40510 (SOL+510)
     complex sound speed in solid element # 92 cycle 0

*** Warning 40510 (SOL+510)
     complex sound speed in solid element # 93 cycle 0

*** Warning 40510 (SOL+510)
     complex sound speed in solid element # 94 cycle 0

*** Warning 40510 (SOL+510)
     complex sound speed in solid element # 95 cycle 0

*** Warning 40510 (SOL+510)
     complex sound speed in solid element # 96 cycle 0

*** Warning 40510 (SOL+510)
     complex sound speed in solid element # 97 cycle 0

*** Warning 40510 (SOL+510)
     complex sound speed in solid element # 98 cycle 0

*** Warning 40510 (SOL+510)
     complex sound speed in solid element # 99 cycle 0

*** Warning 40510 (SOL+510)
     complex sound speed in solid element # 100 cycle 0

*** Warning 40510 (SOL+510)
     complex sound speed in solid element # 101 cycle 0

*** Warning 40510 (SOL+510)
     complex sound speed in solid element # 102 cycle 0

*** Warning 40510 (SOL+510)
     complex sound speed in solid element # 103 cycle 0

*** Warning 40510 (SOL+510)
     complex sound speed in solid element # 104 cycle 0

*** Warning 40510 (SOL+510)
     complex sound speed in solid element # 105 cycle 0

*** Warning 40510 (SOL+510)
     complex sound speed in solid element # 106 cycle 0

*** Warning 40510 (SOL+510)
     complex sound speed in solid element # 107 cycle 0

*** Warning 40510 (SOL+510)
     complex sound speed in solid element # 108 cycle 0

                    ....................
我不明白出现这种现象的原因是什么，希望有经验的大神能够解答一下。模型参数已经反复检查过，确定无误。

寡人逆天而行

出现负体积了，看看网格出现什么毛病了，或者炸药的本构不会的，或者是模型的单位不匹配

3131only

考虑一下参数设错了，