Hi Lucas,.
This is the set up.
Constrained nodes contains the nodes where you want to distribute the mass load.It can’t contain nodes with alrready other SPC’s.
Please report your conclusions.
Regarding the *EQUATION keyword it’s interesting by itself and I will comment on other post not to mix.
*NODE
1,0,0,0
2,0.5,0,0
3,0.5,0,0
4,1,0,0
5,0.5,-0.5,-6.123031769112E-17
6,0.25,0,0
7,0.75,0,0
8,0.5,-0.25,-3.061515884556E-17
9,0.125,0,0
10,0.375,0,0
11,0.625,0,0
12,0.875,0,0
13,0.5,-0.125,-1.530757942278E-17
14,0.5,-0.375,-4.592273826834E-17
15,0.8125,0,0
16,0.9375,0,0
17,0.5,-0.0625,-7.65378971139E-18
18,0.5,-0.1875,-2.296136913417E-17
19,0.5,-0.3125,-3.826894855695E-17
20,0.5,-0.4375,-5.357652797973E-17
21,0.0625,0,0
22,0.1875,0,0
23,0.3125,0,0
24,0.4375,0,0
25,0.5625,0,0
26,0.6875,0,0
27,0.5,-0.40625,-4.974963312403E-17
28,0.5,-0.46875,-5.740342283542E-17
29,0.03125,0,0
30,0.09375,0,0
31,0.15625,0,0
32,0.21875,0,0
33,0.28125,0,0
34,0.34375,0,0
35,0.40625,0,0
36,0.46875,0,0
37,0.53125,0,0
38,0.59375,0,0
39,0.65625,0,0
40,0.71875,0,0
41,0.78125,0,0
42,0.84375,0,0
43,0.90625,0,0
44,0.96875,0,0
45,0.5,-0.03125,-3.826894855695E-18
46,0.5,-0.09375,-1.148068456708E-17
47,0.5,-0.15625,-1.913447427847E-17
48,0.5,-0.21875,-2.678826398986E-17
49,0.5,-0.28125,-3.444205370125E-17
50,0.5,-0.34375,-4.209584341264E-17
51,1,0.05,0
52,0.015625,0,0
53,0.046875,0,0
54,0.078125,0,0
55,0.109375,0,0
56,0.140625,0,0
57,0.171875,0,0
58,0.203125,0,0
59,0.234375,0,0
60,0.265625,0,0
61,0.296875,0,0
62,0.328125,0,0
63,0.359375,0,0
64,0.390625,0,0
65,0.421875,0,0
66,0.453125,0,0
67,0.484375,0,0
68,0.515625,0,0
69,0.546875,0,0
70,0.578125,0,0
71,0.609375,0,0
72,0.640625,0,0
73,0.671875,0,0
74,0.703125,0,0
75,0.734375,0,0
76,0.765625,0,0
77,0.796875,0,0
78,0.828125,0,0
79,0.859375,0,0
80,0.890625,0,0
81,0.921875,0,0
82,0.953125,0,0
83,0.984375,0,0
84,0.5,-0.015625,-1.913447427847E-18
85,0.5,-0.046875,-5.740342283542E-18
86,0.5,-0.078125,-9.567237139237E-18
87,0.5,-0.109375,-1.339413199493E-17
88,0.5,-0.140625,-1.722102685063E-17
89,0.5,-0.171875,-2.104792170632E-17
90,0.5,-0.203125,-2.487481656202E-17
91,0.5,-0.234375,-2.870171141771E-17
92,0.5,-0.265625,-3.252860627341E-17
93,0.5,-0.296875,-3.63555011291E-17
94,0.5,-0.328125,-4.01823959848E-17
95,0.5,-0.359375,-4.400929084049E-17
96,0.5,-0.390625,-4.783618569619E-17
97,0.5,-0.421875,-5.166308055188E-17
98,0.5,-0.453125,-5.548997540758E-17
99,0.5,-0.484375,-5.931687026327E-17
*ELEMENT,TYPE=B32R
1,7,76,41
2,41,77,15
3,15,78,42
4,42,79,12
5,12,80,43
6,43,81,16
7,16,82,44
8,44,83,4
9,2,84,45
10,45,85,17
11,17,86,46
12,46,87,13
13,13,88,47
14,47,89,18
15,18,90,48
16,48,91,8
17,8,92,49
18,49,93,19
19,19,94,50
20,50,95,14
21,14,96,27
22,27,97,20
23,20,98,28
24,28,99,5
25,1,52,29
26,29,53,21
27,21,54,30
28,30,55,9
29,9,56,31
30,31,57,22
31,22,58,32
32,32,59,6
33,6,60,33
34,33,61,23
35,23,62,34
36,34,63,10
37,10,64,35
38,35,65,24
39,24,66,36
40,36,67,2
41,2,68,37
42,37,69,25
43,25,70,38
44,38,71,11
45,11,72,39
46,39,73,26
47,26,74,40
48,40,75,7
*ELEMENT,TYPE=MASS
49,51
*NSET,NSET=ConstrainedNodes
4
*ELSET,ELSET=Component
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
*ELSET,ELSET=Horizontal
1
2
3
4
5
6
7
8
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
*ELSET,ELSET=Mass_1
49
*ELSET,ELSET=EAll
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
*MATERIAL,NAME=Steel
*ELASTIC,TYPE=ISOTROPIC
200000000000,0
*DENSITY
7850
*BEAM SECTION,ELSET=Component,MATERIAL=Steel,SECTION=PIPE
0.025,0.003
0,0,1
*BEAM SECTION,ELSET=Horizontal,MATERIAL=Steel,SECTION=PIPE
0.025,0.003
0,0,1
*BOUNDARY
1,1,,0
1,2,,0
1,3,,0
1,4,,0
1,5,,0
5,1,,0
5,2,,0
5,3,,0
5,4,,0
5,5,,0
*MASS,ELSET=Mass_1
100
*ELEMENT,TYPE=DCOUP3D
50,51
*ELSET,ELSET=DCOUP
50
*DISTRIBUTING COUPLING,ELSET=DCOUP
ConstrainedNodes,2
*STEP
*STATIC,SOLVER=PARDISO
*DLOAD
EAll,GRAV,0,1,0,0
*DLOAD
EAll,GRAV,-9.81,0,1,0
*DLOAD
EAll,GRAV,0,0,0,1
*NODE FILE,GLOBAL=YES
U
*EL FILE
S,NOE
*END STEP