如上图所示，为一弹簧，弹簧的建立需要2个节点，分别为节点1，节点2，在模拟时，我们将节点2固定，在节点1施加一力F，图中黑圆块为质量，这样才是一个完整的弹簧体系！
在建模中有很多注意事项，请看下面简单命令流及解释！
定义节点，共两个！
*NODE
1 0.000000000E+00 0.000000000E+00 0.000000000E+00 0 0
2 4.500000000E+03 0.000000000E+00 0.000000000E+00 0 0
$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
$ SECTION DEFINITIONS $
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截面定义，图中红0为指定轴向单元，对于我们常用的线弹簧，此关键字其它均为0，也就是不考虑复杂的力与速度的关系！
*SECTION_DISCRETE
1 0 0.0000 0.0000 0.0000 0.0000
0.00 0.00
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$
$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
$ MATERIAL DEFINITIONS $
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定义材料，本例为弹性，实际可以选很多，都是S01~S0*
*MAT_SPRING_ELASTIC
1 0.741E+09
$ PARTS DEFINITIONS $
$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
$
$
定义part
*PART
Part 1 for Mat 1 and Elem Type 1
1 1 1 0 0 0 0
$
$
$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
$ ELEMENT DEFINITIONS $
$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
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定义单元，由1与2节点建立
(特别注意：
本帖隐藏的内容
此处节点2可以为0，意义是节点1与地面连接，也就是固接，此时不需要2的约束关键字了，但此方法不能用于扭转弹簧）
*ELEMENT_DISCRETE
1 1
1
2 0
0.000000000E+00 0
0.000000000E+00
定义质量
*ELEMENT_mass
2 1 5e10
$
$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
$ LOAD DEFINITIONS $
$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
$
定义荷载，施加力F
*DEFINE_CURVE
1 0 1.000 1.000 0.000 0.000
0.000000000000E+00 1.000000000000E+08
7.028000000000E+00 0.000000000000E+00
*SET_NODE_LIST
1 0.000 0.000 0.000 0.000
1
*LOAD_NODE_SET
1 1 1 1.000 0 0 0 0
$
$
$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
$ BOUNDARY DEFINITIONS $
$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
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定义约束！
*SET_NODE_LIST
2 0.000 0.000 0.000 0.000
2
*BOUNDARY_SPC_SET
2 0 1 1 1 1 1 1
$
$
Author: Taochun Yang
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