LS-DYNA关键字解析：constrain功能详解

约束接合面

CONSTRAINED_JOINT_PLANAR

平面连接滑块

LS-DYNA手动部分：*CONSTRAINED_JOINT_PLANAR（定义平面铰链，两个刚体之间的运动）

附加部分：

*LOAD_NODE_POINT（定义的力）

*LOAD_SEGMENT（定义的压力）

*INITIAL_VELOCITY_NODE（定义点的速度）

*CONSTRAINED_EXTRA_NODES_SET（定义其他点为刚体，和刚体一起运动）

示例：带平面接头的滑块移动

说明：

这个问题说明了连接两个刚体的平面关节。

型号：

测量2×2×2的第一块沿着测量2×2的第二块滑动

2 * 2 * 8.

第三个柔性体控制时间步长。第一个刚体有一个

向上表面施加100 psi的倾斜压力，并倾斜

施加在40磅下边缘的力。第一个刚体的初始速度

方块是400英寸/秒。

输入：

一个关节定义由节点128（A)、126、129(A)和127组成

（*CONSTRAINED_JOINT_PLANAR）。这些节点是附加到刚体的附加节点

实体和重合（*CONSTRAINED_EXTRA_NODES_SET, *SET_NODE_LIST）。与刚体相连，刚体定义了速度，点也要定义速度。

结果：

图中显示第一个块正确地滑过第二个块。

constrained.joint_planar.k(k文件完整版）

*KEYWORD

*TITLE

test planar joints

$ LSTC Example

$ Last Modified: August 29, 1997

$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$

$ - part 1: fixed, long, rigid block

$ - part 2: rigid block which slides on top of part 1

$ initial velocity = 400

$ - part 3: elastic solid used to set time step

$ Units: lbf-s^2/in, in, s, lbf, psi, lbf-in

$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$

$$$$ Control Output

$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$

$...>....1....>....2....>....3....>....4....>....5....>....6....>....7....>....8

*CONTROL_TERMINATION

$ endtim endcyc dtmin endneg endmas

0.020

*DATABASE_BINARY_D3PLOT

$ dt/cycl lcdt

0.001

*DATABASE_GLSTAT

$ dt

0.0001

*DATABASE_JNTFORC

$ dt

0.0001

*DATABASE_HISTORY_NODE

$ Define nodes that output into nodout

$ id1 id2 id3 id4 id5 id6 id7 id8

91 21 94 128 126 129 127

*DATABASE_NODOUT

$ dt

0.0001

*DATABASE_RBDOUT

$ dt

0.0001

$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$

$$$$ Define Planar Joint

$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$

$...>....1....>....2....>....3....>....4....>....5....>....6....>....7....>....8

*CONSTRAINED_JOINT_PLANAR

$ n1 n2 n3 n4 n5 n6 rps

128 126 129 127 0.000E+00

*CONSTRAINED_EXTRA_NODES_SET

$ pid nsid

1 1

*SET_NODE_LIST

$ sid

$ nid1 nid2 nid3 nid4 nid5 nid6 nid7 nid8

126 127

*CONSTRAINED_EXTRA_NODES_SET

$ pid nsid

2 2

*SET_NODE_LIST

$ sid

$ nid1 nid2 nid3 nid4 nid5 nid6 nid7 nid8

128 129

$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$

$$$$ Parts and Materials

$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$

$...>....1....>....2....>....3....>....4....>....5....>....6....>....7....>....8

*PART

fixed rigid body

$ pid sid mid eosid hgid igrav adpopt

1 1 1

*PART

sliding rigid body

2 2 2

*PART

elastic body for time step control

3 3 3

$$$$ Materials

*MAT_RIGID

$ mid ro e pr n couple m alias

1 7.850E-04 3.000E+07 3.000E-01

$ cmo con1 con2

1.000E+00 7.000E+00 7.000E+00

$ lco/a1 a2 a3 v1 v2 v3

*MAT_RIGID

$ mid ro e pr n couple m alias

2 7.850E-04 3.000E+07 3.000E-01

$ cmo con1 con2

$ lco/a1 a2 a3 v1 v2 v3

*MAT_ELASTIC

$ mid ro e pr

3 7.850E-04 3.000E+07 3.000E-01

$$$$ Sections

*SECTION_SOLID

$ sid elform

1 0

2 0

3 0

$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$

$$$$ Loading

$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$

$$$$ Pressure load on top of block

*LOAD_SEGMENT

$ lcid sf at n1 n2 n3 n4

1 1.000E+00 0.000E+00 97 106 107 98

1 1.000E+00 0.000E+00 106 115 116 107

1 1.000E+00 0.000E+00 98 107 108 99

1 1.000E+00 0.000E+00 107 116 117 108

*DEFINE_CURVE

$ lcid sidr scla sclo offa offo

1 0 0.000E+00 0.000E+00 0.000E+00 0.000E+00

$ abscissa ordinate

0.00000000E+00 0.00000000E+00

9.99999978E-03 1.00000000E+02

1.99999996E-02 1.00000000E+02

$$$$ Force load on lower edge of block

*LOAD_NODE_POINT

$ nid dof lcid sf cid m1 m2 m3

91 3 2-1.000E+00 0

92 3 2-1.000E+00 0

93 3 2-1.000E+00 0

*DEFINE_CURVE

$ lcid sidr scla sclo offa offo

2 0 0.000E+00 0.000E+00 0.000E+00 0.000E+00

$ abscissa ordinate

0.00000000E+00 0.00000000E+00

1.99999996E-02 4.00000000E+01

$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$

$$$$ Initial Conditions

$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$

*INITIAL_VELOCITY_NODE

$ nid vx vy vz vxe vye vze

$$$ Nodes on sliding block

91 4.000E+02 0.000E+00 0.000E+00

92 4.000E+02 0.000E+00 0.000E+00

93 4.000E+02 0.000E+00 0.000E+00

94 4.000E+02 0.000E+00 0.000E+00

95 4.000E+02 0.000E+00 0.000E+00

96 4.000E+02 0.000E+00 0.000E+00

97 4.000E+02 0.000E+00 0.000E+00

98 4.000E+02 0.000E+00 0.000E+00

99 4.000E+02 0.000E+00 0.000E+00

100 4.000E+02 0.000E+00 0.000E+00

101 4.000E+02 0.000E+00 0.000E+00

102 4.000E+02 0.000E+00 0.000E+00

103 4.000E+02 0.000E+00 0.000E+00

104 4.000E+02 0.000E+00 0.000E+00

105 4.000E+02 0.000E+00 0.000E+00

106 4.000E+02 0.000E+00 0.000E+00

107 4.000E+02 0.000E+00 0.000E+00

108 4.000E+02 0.000E+00 0.000E+00

109 4.000E+02 0.000E+00 0.000E+00

110 4.000E+02 0.000E+00 0.000E+00

111 4.000E+02 0.000E+00 0.000E+00

112 4.000E+02 0.000E+00 0.000E+00

113 4.000E+02 0.000E+00 0.000E+00

114 4.000E+02 0.000E+00 0.000E+00

115 4.000E+02 0.000E+00 0.000E+00

116 4.000E+02 0.000E+00 0.000E+00

117 4.000E+02 0.000E+00 0.000E+00

$$$ Extra nodes on sliding rigid block

128 4.000E+02 0.000E+00 0.000E+00

129 4.000E+02 0.000E+00 0.000E+00

$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$

$$$$ Nodes and Elements

$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$

*NODE

$ node x y z tc rc

1 0.000000000E+00 0.000000000E+00 0.000000000E+00 0 0

2 1.111111164E+00 0.000000000E+00 0.000000000E+00 0 0

3 2.222222328E+00 0.000000000E+00 0.000000000E+00 0 0

4 3.333333254E+00 0.000000000E+00 0.000000000E+00 0 0

5 4.444444656E+00 0.000000000E+00 0.000000000E+00 0 0

6 5.555555344E+00 0.000000000E+00 0.000000000E+00 0 0

7 6.666666508E+00 0.000000000E+00 1.110223025E-16 0 0

8 7.777777672E+00 0.000000000E+00-2.220446049E-16 0 0

9 8.888889313E+00 0.000000000E+00-1.110223025E-16 0 0

10 1.000000000E+01 0.000000000E+00 0.000000000E+00 0 0

11 0.000000000E+00 1.000000000E+00 0.000000000E+00 0 0

12 1.111111164E+00 1.000000000E+00 0.000000000E+00 0 0

13 2.222222328E+00 1.000000000E+00 3.330669074E-16 0 0

14 3.333333254E+00 1.000000000E+00 3.330669074E-16 0 0

15 4.444444656E+00 1.000000000E+00 2.220446049E-16 0 0

16 5.555555344E+00 1.000000000E+00-2.220446049E-16 0 0

17 6.666666508E+00 1.000000000E+00 0.000000000E+00 0 0

18 7.777777672E+00 1.000000000E+00-2.220446049E-16 0 0

19 8.888889313E+00 1.000000000E+00-1.110223025E-16 0 0

20 1.000000000E+01 1.000000000E+00 0.000000000E+00 0 0

21 0.000000000E+00 2.000000000E+00 0.000000000E+00 0 0

22 1.111111164E+00 2.000000000E+00 0.000000000E+00 0 0

23 2.222222328E+00 2.000000000E+00 0.000000000E+00 0 0

24 3.333333254E+00 2.000000000E+00 0.000000000E+00 0 0

25 4.444444656E+00 2.000000000E+00 0.000000000E+00 0 0

26 5.555555344E+00 2.000000000E+00 0.000000000E+00 0 0

27 6.666666508E+00 2.000000000E+00 0.000000000E+00 0 0

28 7.777777672E+00 2.000000000E+00 0.000000000E+00 0 0

29 8.888889313E+00 2.000000000E+00 0.000000000E+00 0 0

30 1.000000000E+01 2.000000000E+00 0.000000000E+00 0 0

31 0.000000000E+00 0.000000000E+00 1.000000000E+00 0 0

32 1.111111164E+00 0.000000000E+00 1.000000000E+00 0 0

33 2.222222328E+00 1.110223025E-16 1.000000000E+00 0 0

34 3.333333254E+00 1.110223025E-16 1.000000000E+00 0 0

35 4.444444656E+00 0.000000000E+00 1.000000000E+00 0 0

36 5.555555344E+00 0.000000000E+00 1.000000000E+00 0 0

37 6.666666508E+00 5.551115123E-17 1.000000000E+00 0 0

38 7.777777672E+00 0.000000000E+00 1.000000000E+00 0 0

39 8.888889313E+00 0.000000000E+00 1.000000000E+00 0 0

40 1.000000000E+01 0.000000000E+00 1.000000000E+00 0 0

41 0.000000000E+00 1.000000000E+00 1.000000000E+00 0 0

42 1.111111164E+00 1.000000000E+00 1.000000000E+00 0 0

43 2.222222328E+00 1.000000000E+00 1.000000000E+00 0 0

44 3.333333254E+00 1.000000000E+00 1.000000000E+00 0 0

45 4.444444656E+00 1.000000000E+00 1.000000000E+00 0 0

46 5.555555344E+00 1.000000000E+00 1.000000000E+00 0 0

47 6.666666508E+00 1.000000000E+00 1.000000000E+00 0 0

48 7.777777672E+00 1.000000000E+00 1.000000000E+00 0 0

49 8.888889313E+00 1.000000000E+00 1.000000000E+00 0 0

50 1.000000000E+01 1.000000000E+00 1.000000000E+00 0 0

51 0.000000000E+00 2.000000000E+00 1.000000000E+00 0 0

52 1.111111164E+00 2.000000000E+00 1.000000000E+00 0 0

53 2.222222328E+00 2.000000000E+00 1.000000000E+00 0 0

54 3.333333254E+00 2.000000000E+00 1.000000000E+00 0 0

55 4.444444656E+00 2.000000000E+00 1.000000000E+00 0 0

56 5.555555344E+00 2.000000000E+00 1.000000000E+00 0 0

57 6.666666508E+00 2.000000000E+00 1.000000000E+00 0 0

58 7.777777672E+00 2.000000000E+00 1.000000000E+00 0 0

59 8.888889313E+00 2.000000000E+00 1.000000000E+00 0 0

60 1.000000000E+01 2.000000000E+00 1.000000000E+00 0 0

61 0.000000000E+00 0.000000000E+00 2.000000000E+00 0 0

62 1.111111164E+00 0.000000000E+00 2.000000000E+00 0 0

63 2.222222328E+00 0.000000000E+00 2.000000000E+00 0 0

64 3.333333254E+00 0.000000000E+00 2.000000000E+00 0 0

65 4.444444656E+00 0.000000000E+00 2.000000000E+00 0 0

66 5.555555344E+00 0.000000000E+00 2.000000000E+00 0 0

67 6.666666508E+00 0.000000000E+00 2.000000000E+00 0 0

68 7.777777672E+00 0.000000000E+00 2.000000000E+00 0 0

69 8.888889313E+00 0.000000000E+00 2.000000000E+00 0 0

70 1.000000000E+01 0.000000000E+00 2.000000000E+00 0 0

71 0.000000000E+00 1.000000000E+00 2.000000000E+00 0 0

72 1.111111164E+00 1.000000000E+00 2.000000000E+00 0 0

73 2.222222328E+00 1.000000000E+00 2.000000000E+00 0 0

74 3.333333254E+00 1.000000000E+00 2.000000000E+00 0 0

75 4.444444656E+00 1.000000000E+00 2.000000000E+00 0 0

76 5.555555344E+00 1.000000000E+00 2.000000000E+00 0 0

77 6.666666508E+00 1.000000000E+00 2.000000000E+00 0 0

78 7.777777672E+00 1.000000000E+00 2.000000000E+00 0 0

79 8.888889313E+00 1.000000000E+00 2.000000000E+00 0 0

80 1.000000000E+01 1.000000000E+00 2.000000000E+00 0 0

81 0.000000000E+00 2.000000000E+00 2.000000000E+00 0 0

82 1.111111164E+00 2.000000000E+00 2.000000000E+00 0 0

83 2.222222328E+00 2.000000000E+00 2.000000000E+00 0 0

84 3.333333254E+00 2.000000000E+00 2.000000000E+00 0 0

85 4.444444656E+00 2.000000000E+00 2.000000000E+00 0 0

86 5.555555344E+00 2.000000000E+00 2.000000000E+00 0 0

87 6.666666508E+00 2.000000000E+00 2.000000000E+00 0 0

88 7.777777672E+00 2.000000000E+00 2.000000000E+00 0 0

89 8.888889313E+00 2.000000000E+00 2.000000000E+00 0 0

90 1.000000000E+01 2.000000000E+00 2.000000000E+00 0 0

91 0.000000000E+00 2.000000000E+00 0.000000000E+00 0 0

92 1.000000000E+00 2.000000000E+00 0.000000000E+00 0 0

93 2.000000000E+00 2.000000000E+00 0.000000000E+00 0 0

94 0.000000000E+00 3.000000000E+00 0.000000000E+00 0 0

95 1.000000000E+00 3.000000000E+00 0.000000000E+00 0 0

96 2.000000000E+00 3.000000000E+00 0.000000000E+00 0 0

97 0.000000000E+00 4.000000000E+00 0.000000000E+00 0 0

98 1.000000000E+00 4.000000000E+00 0.000000000E+00 0 0

99 2.000000000E+00 4.000000000E+00 0.000000000E+00 0 0

100 0.000000000E+00 2.000000000E+00 1.000000000E+00 0 0

101 1.000000000E+00 2.000000000E+00 1.000000000E+00 0 0

102 2.000000000E+00 2.000000000E+00 1.000000000E+00 0 0

103 0.000000000E+00 3.000000000E+00 1.000000000E+00 0 0

104 1.000000000E+00 3.000000000E+00 1.000000000E+00 0 0

105 2.000000000E+00 3.000000000E+00 1.000000000E+00 0 0

106 0.000000000E+00 4.000000000E+00 1.000000000E+00 0 0

107 1.000000000E+00 4.000000000E+00 1.000000000E+00 0 0

108 2.000000000E+00 4.000000000E+00 1.000000000E+00 0 0

109 0.000000000E+00 2.000000000E+00 2.000000000E+00 0 0

110 1.000000000E+00 2.000000000E+00 2.000000000E+00 0 0

111 2.000000000E+00 2.000000000E+00 2.000000000E+00 0 0

112 0.000000000E+00 3.000000000E+00 2.000000000E+00 0 0

113 1.000000000E+00 3.000000000E+00 2.000000000E+00 0 0

114 2.000000000E+00 3.000000000E+00 2.000000000E+00 0 0

115 0.000000000E+00 4.000000000E+00 2.000000000E+00 0 0

116 1.000000000E+00 4.000000000E+00 2.000000000E+00 0 0

117 2.000000000E+00 4.000000000E+00 2.000000000E+00 0 0

118 0.000000000E+00 6.000000000E+00 0.000000000E+00 0 0

119 2.000000000E+00 6.000000000E+00 0.000000000E+00 0 0

120 0.000000000E+00 8.000000000E+00 0.000000000E+00 0 0

121 2.000000000E+00 8.000000000E+00 0.000000000E+00 0 0

122 0.000000000E+00 6.000000000E+00 2.000000000E+00 0 0

123 2.000000000E+00 6.000000000E+00 2.000000000E+00 0 0

124 0.000000000E+00 8.000000000E+00 2.000000000E+00 0 0

125 2.000000000E+00 8.000000000E+00 2.000000000E+00 0 0

126 1.000000000E+01 0.000000000E+00 1.000000000E+00 0 0

127 1.000000000E+01 4.000000000E+00 1.000000000E+00 0 0

128 1.000000000E+01 0.000000000E+00 1.000000000E+00 0 0

129 1.000000000E+01 4.000000000E+00 1.000000000E+00 0 0

*ELEMENT_SOLID

$ eid pid n1 n2 n3 n4 n5 n6 n7 n8

1 1 1 2 12 11 31 32 42 41

2 1 2 3 13 12 32 33 43 42

3 1 3 4 14 13 33 34 44 43

4 1 4 5 15 14 34 35 45 44

5 1 5 6 16 15 35 36 46 45

6 1 6 7 17 16 36 37 47 46

7 1 7 8 18 17 37 38 48 47

8 1 8 9 19 18 38 39 49 48

9 1 9 10 20 19 39 40 50 49

10 1 11 12 22 21 41 42 52 51

11 1 12 13 23 22 42 43 53 52

12 1 13 14 24 23 43 44 54 53

13 1 14 15 25 24 44 45 55 54

14 1 15 16 26 25 45 46 56 55

15 1 16 17 27 26 46 47 57 56

16 1 17 18 28 27 47 48 58 57

17 1 18 19 29 28 48 49 59 58

18 1 19 20 30 29 49 50 60 59

19 1 31 32 42 41 61 62 72 71

20 1 32 33 43 42 62 63 73 72

21 1 33 34 44 43 63 64 74 73

22 1 34 35 45 44 64 65 75 74

23 1 35 36 46 45 65 66 76 75

24 1 36 37 47 46 66 67 77 76

25 1 37 38 48 47 67 68 78 77

26 1 38 39 49 48 68 69 79 78

27 1 39 40 50 49 69 70 80 79

28 1 41 42 52 51 71 72 82 81

29 1 42 43 53 52 72 73 83 82

30 1 43 44 54 53 73 74 84 83

31 1 44 45 55 54 74 75 85 84

32 1 45 46 56 55 75 76 86 85

33 1 46 47 57 56 76 77 87 86

34 1 47 48 58 57 77 78 88 87

35 1 48 49 59 58 78 79 89 88

36 1 49 50 60 59 79 80 90 89

37 2 91 92 95 94 100 101 104 103

38 2 92 93 96 95 101 102 105 104

39 2 94 95 98 97 103 104 107 106

40 2 95 96 99 98 104 105 108 107

41 2 100 101 104 103 109 110 113 112

42 2 101 102 105 104 110 111 114 113

43 2 103 104 107 106 112 113 116 115

44 2 104 105 108 107 113 114 117 116

45 3 118 119 121 120 122 123 125 124

*END

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