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[求助]
侵徹問題求助，ls-dyna模擬鎢桿彈侵徹鋼，靶體很軟，沒有減速效果
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 鎢桿彈以1500m/s侵徹鋼靶，侵深1.5米，彈體速度才降低了20不到，單位是m—kg-s怎么回事。參數(shù)如下： 本構(gòu)*MAT_STEINBERG 1,17300,1.32E+11,1.4E+09,1.3,0.1,0,2.5E+09 1.36E-11,1.36E-11,-0.000303,0.001,175,2766,1.67,1.3 -1.8E+09,2,1272.7, ,1,1.3765 0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0 *EOS_GRUNEISEN 1,4040,1.29,0,0,1.67,1.3,0 1 *MAT_JOHNSON_COOK 2,7830,0.77E+11 7.92E-03,5.1E-03,0.26,0.14E-01,1.03,1793,294,1 477,-9E+11,3,0,4,0,0,0 0 *EOS_GRUNEISEN 2,4569,1.49,0,0,2.17,0.46,0 1 侵蝕面面接觸*CONTACT_ERODING_SURFACE_TO_SURFACE 1,2,3,3,0,0,0,0 0,0,0,0,0,1 1,1,0,0,1,1,1,1 1,1,1 四分之一模型，設(shè)對稱邊界與四周邊界面和底面為無反射邊界 控制選項(xiàng)： *CONTROL_ENERGY 1 2 2 1 *CONTROL_BULK_VISCOSITY 1.50 0.600E-01 *CONTROL_CONTACT 2.00000 *CONTROL_TIMESTEP 0.0000 0.9000 0 0.00 0.00 *CONTROL_TERMINATION 1.000E-03 0 0.00000 0.00000 0.00000 *DATABASE_BINARY_D3PLOT 1.0000E-05 *DATABASE_BINARY_D3THDT 1.0000E-05 $ $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$ $ DATABASE OPTIONS $ $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$ $ *DATABASE_EXTENT_BINARY 0 0 3 1 0 0 0 0 0 0 4 0 0 0 *INITIAL_VELOCITY_GENERATION 1,2,0,0,-1500,0,0 0,0,0,0,0,0,0 *END 謝謝大家啦！ |
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