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折腾了一个爆炸容器算例,模拟1kgTNT在容器中心爆炸,计算容器的动力响应。容器是一个壳体结构,壳体可以采用solid单元建模,也可以采用shell单元建模,单是在相同条件下,得到两者的应力应变曲线差异很大,在这里请高手们指教。
(一)装药、空气、容器采用solid单元建模的单元及材料定义如下
$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
$ SECTION DEFINITIONS $
$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
$
*SECTION_SOLID_ALE
1 11
*SECTION_SOLID_ALE
2 11
*SECTION_SOLID
3 1
$
$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
$ 添加控制项 $
$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
$
*CONTROL_ALE
2 1 2-1.0000000 0.0000000 0.0000000 0.0000000
0.0000000 0.0000000 0.0000000
*CONSTRAINED_LAGRANGE_IN_SOLID
1 2 0 0 0 5 3 0
0 0 0.15 0.00
*SET_PART_LIST
1
3
*SET_PART_LIST
2
1 2
$
*ALE_MULTI-MATERIAL_GROUP
1 1
2 1
*INITIAL_DETONATION
1 0.00 0.00 0.00 0.00
$
$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
$ MATERIAL DEFINITIONS $
$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
$
*MAT_HIGH_EXPLOSIVE_BURN
1,1.63,0.693,0.210,0.00e+00
*EOS_JWL
1,3.71,3.230E-02,4.15,0.950,0.280,7.00E-02,1.00
*MAT_NULL
2 0.125E-02 0.00 0.00 0.00 0.00 0.00 0.00
*EOS_LINEAR_POLYNOMIAL
2 0.00 0.00 0.00 0.00 0.40 0.40 0.00
2.5e-06 1.00
*MAT_PLASTIC_KINEMATIC
3 7.80 2.00 0.300000 0.340E-02 0.00 0.00
0.00 0.00 0.00
$
(二)装药、空气为solid单元,容器采用shell单元,
$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
$ SECTION DEFINITIONS $
$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
$
*SECTION_SOLID_ALE
1 11
*SECTION_SOLID_ALE
2 11
*SECTION_SHELL
3 6 1.0 4.0 0.0 0.0 0
4.00 4.00 4.00 4.00 1.00
$
$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
$ 添加控制项 $
$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
$
*CONTROL_ALE
2 1 2-1.0000000 0.0000000 0.0000000 0.0000000
0.0000000 0.0000000 0.0000000
*CONSTRAINED_LAGRANGE_IN_SOLID
1 2 0 0 0 5 3 0
0 0 0.15 0.00
*SET_PART_LIST
1
3
*SET_PART_LIST
2
1 2
$
*ALE_MULTI-MATERIAL_GROUP
1 1
2 1
*INITIAL_DETONATION
1 0.00 0.00 0.00 0.00
$
$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
$ MATERIAL DEFINITIONS $
$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
$
*MAT_HIGH_EXPLOSIVE_BURN
1,1.63,0.693,0.210,0.00e+00
*EOS_JWL
1,3.71,3.230E-02,4.15,0.950,0.280,7.00E-02,1.00
*MAT_NULL
2 0.125E-02 0.00 0.00 0.00 0.00 0.00 0.00
*EOS_LINEAR_POLYNOMIAL
2 0.00 0.00 0.00 0.00 0.40 0.40 0.00
2.5e-06 1.00
*MAT_PLASTIC_KINEMATIC
3 7.80 2.10 0.300000 0.325E-02 0.00 0.00
0.00 0.00 0.00
$
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