*Heading
Inertia Relief analysis option for Multiple load cases
*Part, name=Part-1
*End Part
*Assembly, name=Assembly
**
*Instance, name=Part-1-1, part=Part-1
*Node
1, 1.6, -3.2, 0.
2, 0., -4., 0.
3, 0.01216974, -8., 0.
4, 4., -8., 0.
5, 4., -6.472136, 0.
6, 4.211145, -5.577709, 0.
7, 6., -2., 0.
8, 4., 0., 0.
9, -9.004409, -4., 0.
10, -8.97745, -8., 0.
11, -2., -8., 0.
12, -15.05573, -4., 0.
13, -14.92905, -8., 0.
14, -19., -8., 0.
15, -16., -8., 0.
16, -16.84458, -4.422291, 0.
17, -18.95467, -6.821343, 0.
18, -19.44721, -5.723607, 0.
19, -20., -7., 0.
20, -20., -6.618034, 0.
21, 0.8031251, -3.831663, 0.
22, 0.006154671, -4.917082, 0.
23, 0.01602751, -5.931712, 0.
24, 0.01502819, -6.967278, 0.
25, 1.023282, -8., 0.
26, 2.032166, -8., 0.
27, 3.026647, -8., 0.
28, 4., -7.178097, 0.
29, 4.711081, -4.577838, 0.
30, 5.169517, -3.660965, 0.
31, 5.618927, -2.762145, 0.
32, 5.432555, -1.432555, 0.
33, 4.757285, -0.757285, 0.
34, 3.348218, -0.8690429, 0.
35, 2.749256, -1.667658, 0.
36, 2.174428, -2.434096, 0.
37, -8.99791, -5.000177, 0.
38, -8.988499, -6.0003, 0.
39, -8.980816, -7.000247, 0.
40, -7.990024, -8., 0.
41, -6.997742, -8., 0.
42, -6.001842, -8., 0.
43, -5.003505, -8., 0.
44, -4.003501, -8., 0.
45, -3.002222, -8., 0.
46, -0.995423, -8., 0.
47, -1.001525, -4., 0.
48, -2.004194, -4., 0.
49, -3.006888, -4., 0.
50, -4.009352, -4., 0.
51, -5.011513, -4., 0.
52, -6.013093, -4., 0.
53, -7.013328, -4., 0.
54, -8.01093, -4., 0.
55, -14.93441, -5.066488, 0.
56, -14.86637, -6.062255, 0.
57, -14.88339, -7.041842, 0.
58, -13.91152, -8., 0.
59, -12.91319, -8., 0.
60, -11.9231, -8., 0.
61, -10.9377, -8., 0.
62, -9.959577, -8., 0.
63, -9.992516, -4., 0.
64, -10.97867, -4., 0.
65, -11.96653, -4., 0.
66, -12.96423, -4., 0.
67, -13.98602, -4., 0.
68, -18.2582, -8., 0.
69, -17.50344, -8., 0.
70, -16.73624, -8., 0.
71, -17.85347, -4.926733, 0.
72, -18.69098, -5.345491, 0.
73, -15.97474, -4.107004, 0.
74, -18.89937, -7.36928, 0.
75, -19.11133, -6.308973, 0.
76, -19.48832, -6.962916, 0.
77, -19.71333, -7.700827, 0.
78, 2.193256, -4.435803, 0.
79, 1.009337, -4.765504, 0.
80, 2.051695, -6.965624, 0.
81, 2.100143, -5.845548, 0.
82, 3.334997, -5.036431, 0.
83, 4.120387, -1.558213, 0.
84, 3.531943, -2.412759, 0.
85, 2.928864, -3.327535, 0.
86, 1.0382, -5.87431, 0.
87, 1.032051, -6.951803, 0.
88, 3.049525, -7.062157, 0.
89, 3.121166, -6.104068, 0.
90, 3.830415, -4.005252, 0.
91, 4.346718, -3.079204, 0.
92, 4.876421, -2.204804, 0.
93, -8.005321, -5.000063, 0.
94, -7.998403, -6.000112, 0.
95, -7.992512, -7.000095, 0.
96, -7.009016, -5.000022, 0.
97, -7.00395, -6.00004, 0.
98, -6.999558, -7.000035, 0.
99, -6.010016, -5.000008, 0.
100, -6.006382, -6.000014, 0.
101, -6.003204, -7.000013, 0.
102, -5.009406, -4.999948, 0.
103, -5.006826, -5.999897, 0.
104, -5.004545, -6.999885, 0.
105, -4.007888, -4.999379, 0.
106, -4.006001, -5.998989, 0.
107, -4.004303, -6.999166, 0.
108, -3.00573, -4.99683, 0.
109, -3.004154, -5.995631, 0.
110, -3.00278, -6.996909, 0.
111, -2.002861, -4.989235, 0.
112, -2.000996, -5.986964, 0.
113, -1.999788, -6.991699, 0.
114, -0.9989526, -4.969475, 0.
115, -0.9952729, -5.968178, 0.
116, -0.9938641, -6.981789, 0.
117, -13.93812, -5.026113, 0.
118, -13.89847, -6.029896, 0.
119, -13.89765, -7.020253, 0.
120, -12.94137, -5.010501, 0.
121, -12.9161, -6.013513, 0.
122, -12.90496, -7.009274, 0.
123, -11.9523, -5.004233, 0.
124, -11.93437, -6.005874, 0.
125, -11.92374, -7.004175, 0.
126, -10.96778, -5.00169, 0.
127, -10.95408, -6.002477, 0.
128, -10.94472, -7.00182, 0.
129, -9.982904, -5.000665, 0.
130, -9.97221, -6.001017, 0.
131, -9.96433, -7.000771, 0.
132, -18.25879, -7.306129, 0.
133, -17.50822, -7.226885, 0.
134, -16.70385, -7.148581, 0.
135, -15.85276, -7.085243, 0.
136, -18.31516, -6.645236, 0.
137, -17.56257, -6.460413, 0.
138, -16.71899, -6.288424, 0.
139, -15.8294, -6.153761, 0.
140, -18.4599, -5.99772, 0.
141, -17.66656, -5.695421, 0.
142, -16.78046, -5.395831, 0.
143, -15.87975, -5.180771, 0.
144, -19.36614, -7.353789, 0.
145, -19.5767, -6.693744, 0.
*Element, type=CPE4
1, 1, 21, 79, 78
2, 21, 2, 22, 79
3, 22, 23, 86, 79
4, 23, 24, 87, 86
5, 24, 3, 25, 87
6, 79, 86, 81, 78
7, 86, 87, 80, 81
8, 87, 25, 26, 80
9, 26, 27, 88, 80
10, 27, 4, 28, 88
11, 80, 88, 89, 81
12, 88, 28, 5, 89
13, 81, 89, 82, 78
14, 89, 5, 6, 82
15, 6, 29, 90, 82
16, 29, 30, 91, 90
17, 30, 31, 92, 91
18, 31, 7, 32, 92
19, 82, 90, 85, 78
20, 90, 91, 84, 85
21, 91, 92, 83, 84
22, 92, 32, 33, 83
23, 33, 8, 34, 83
24, 83, 34, 35, 84
25, 84, 35, 36, 85
26, 85, 36, 1, 78
27, 9, 37, 93, 54
28, 37, 38, 94, 93
29, 38, 39, 95, 94
30, 39, 10, 40, 95
31, 54, 93, 96, 53
32, 93, 94, 97, 96
33, 94, 95, 98, 97
34, 95, 40, 41, 98
35, 53, 96, 99, 52
36, 96, 97, 100, 99
37, 97, 98, 101, 100
38, 98, 41, 42, 101
39, 52, 99, 102, 51
40, 99, 100, 103, 102
41, 100, 101, 104, 103
42, 101, 42, 43, 104
43, 51, 102, 105, 50
44, 102, 103, 106, 105
45, 103, 104, 107, 106
46, 104, 43, 44, 107
47, 50, 105, 108, 49
48, 105, 106, 109, 108
49, 106, 107, 110, 109
50, 107, 44, 45, 110
51, 49, 108, 111, 48
52, 108, 109, 112, 111
53, 109, 110, 113, 112
54, 110, 45, 11, 113
55, 48, 111, 114, 47
56, 111, 112, 115, 114
57, 112, 113, 116, 115
58, 113, 11, 46, 116
59, 47, 114, 22, 2
60, 114, 115, 23, 22
61, 115, 116, 24, 23
62, 116, 46, 3, 24
63, 12, 55, 117, 67
64, 55, 56, 118, 117
65, 56, 57, 119, 118
66, 57, 13, 58, 119
67, 67, 117, 120, 66
68, 117, 118, 121, 120
69, 118, 119, 122, 121
70, 119, 58, 59, 122
71, 66, 120, 123, 65
72, 120, 121, 124, 123
73, 121, 122, 125, 124
74, 122, 59, 60, 125
75, 65, 123, 126, 64
76, 123, 124, 127, 126
77, 124, 125, 128, 127
78, 125, 60, 61, 128
79, 64, 126, 129, 63
80, 126, 127, 130, 129
81, 127, 128, 131, 130
82, 128, 61, 62, 131
83, 63, 129, 37, 9
84, 129, 130, 38, 37
85, 130, 131, 39, 38
86, 131, 62, 10, 39
87, 14, 68, 132, 74
88, 68, 69, 133, 132
89, 69, 70, 134, 133
90, 70, 15, 135, 134
91, 15, 13, 57, 135
92, 74, 132, 136, 17
93, 132, 133, 137, 136
94, 133, 134, 138, 137
95, 134, 135, 139, 138
96, 135, 57, 56, 139
97, 17, 136, 140, 75
98, 136, 137, 141, 140
99, 137, 138, 142, 141
100, 138, 139, 143, 142
101, 139, 56, 55, 143
102, 75, 140, 72, 18
103, 140, 141, 71, 72
104, 141, 142, 16, 71
105, 142, 143, 73, 16
106, 143, 55, 12, 73
107, 74, 17, 76, 144
108, 76, 19, 77, 144
109, 77, 14, 74, 144
110, 20, 19, 76, 145
111, 76, 17, 75, 145
112, 75, 18, 20, 145
** Region: (plane:Picked)
*Elset, elset=_I1, internal, generate
1, 112, 1
*ELSET,elset=EALL,internal,generate
1,112,1
** Section: plane
*Solid Section, elset=_I1, material=steel
0.2
*End Instance
*Nset, nset=front, instance=Part-1-1
14,
*Nset, nset=back, instance=Part-1-1
4,
*Nset, nset=eall, instance=Part-1-1, generate
1, 145, 1
*Elset, elset=eall, instance=Part-1-1, generate
1, 112, 1
*Elset, elset=_bottom_E2, internal, instance=Part-1-1
5, 8, 30, 34, 38, 42, 46, 50, 54, 58, 62, 66, 70, 74, 78, 82
86, 108
*Elset, elset=_bottom_E1, internal, instance=Part-1-1
9, 10, 87, 88, 89, 90, 91, 109
*Surface, type=ELEMENT, name=bottom
_bottom_E2, S2
_bottom_E1, S1
*Elset, elset=_top_E2, internal, instance=Part-1-1, generate
23, 26, 1
*Elset, elset=_top_E1, internal, instance=Part-1-1
1, 2
*Elset, elset=_top_E4, internal, instance=Part-1-1, generate
27, 83, 4
*Elset, elset=_top_E3, internal, instance=Part-1-1
105, 106
*Surface, type=ELEMENT, name=top
_top_E2, S2
_top_E1, S1
_top_E4, S4
_top_E3, S3
*Elset, elset=_tail_E2, internal, instance=Part-1-1
10, 12, 14, 18, 22, 23, 24, 25, 26
*Elset, elset=_tail_E1, internal, instance=Part-1-1
1, 2, 15, 16, 17, 18, 23
*Surface, type=ELEMENT, name=tail
_tail_E2, S2
_tail_E1, S1
*Elset, elset=_cockpit_E2, internal, instance=Part-1-1
108, 112
*Elset, elset=_cockpit_E1, internal, instance=Part-1-1
109, 110
*Elset, elset=_cockpit_E3, internal, instance=Part-1-1, generate
102, 106, 1
*Surface, type=ELEMENT, name=cockpit
_cockpit_E2, S2
_cockpit_E1, S1
_cockpit_E3, S3
*End Assembly
**
** MATERIALS
**
*Material, name=steel
*Density
7800.,
*Elastic
2e+11, 0.3
** ----------------------------------------------------------------
**
** STEP: Step-1
**
*Step, name=Step-1, perturbation
Multiple load with inertia relief analysis
*Static
** LOAD CASES
**
*Load Case, name=all
** Name: BC-1 Type: Displacement/Rotation Scale factor: 1
*Boundary, op=NEW
front, 1, 1
front, 2, 2
** Name: BC-2 Type: Displacement/Rotation Scale factor: 1
*Boundary, op=NEW
back, 2, 2
** Name: bot-pres Type: Pressure Scale factor: 1
*Dsload, op=NEW
bottom, P, 10.
** Name: cockpit-pres Type: Pressure Scale factor: 1
*Dsload, op=NEW
cockpit, P, 10.
** Name: grav Type: Gravity Scale factor: 1
*Dload
eall, GRAV, 9.81, 0., -1., 0.
** Name: inertia Type: Inertia relief Scale factor: 1
*Inertia Relief
** Name: tail-pres Type: Pressure Scale factor: 1
*Dsload, op=NEW
tail, P, 10.
** Name: top-pres Type: Pressure Scale factor: 1
*Dsload, op=NEW
cockpit, P, 10.
*End Load Case
*Load Case, name=b-c-t-g-i
** Name: BC-1 Type: Displacement/Rotation Scale factor: 1
*Boundary, op=NEW
front, 1, 1
front, 2, 2
** Name: BC-2 Type: Displacement/Rotation Scale factor: 1
*Boundary, op=NEW
back, 2, 2
** Name: bot-pres Type: Pressure Scale factor: 1
*Dsload, op=NEW
bottom, P, 10.
** Name: cockpit-pres Type: Pressure Scale factor: 2
*Dsload, op=NEW
cockpit, P, 20.
** Name: grav Type: Gravity Scale factor: 1
*Dload
eall, GRAV, 9.81, 0., -1., 0.
** Name: inertia Type: Inertia relief Scale factor: 1
*Inertia Relief
** Name: tail-pres Type: Pressure Scale factor: 1.75
*Dsload, op=NEW
tail, P, 17.5
*End Load Case
*Load Case, name=t-c-t-i-g
** Name: BC-1 Type: Displacement/Rotation Scale factor: 1
*Boundary, op=NEW
front, 1, 1
front, 2, 2
** Name: BC-2 Type: Displacement/Rotation Scale factor: 1
*Boundary, op=NEW
back, 2, 2
** Name: cockpit-pres Type: Pressure Scale factor: 1
*Dsload, op=NEW
cockpit, P, 10.
** Name: grav Type: Gravity Scale factor: 1
*Dload
eall, GRAV, 9.81, 0., -1., 0.
** Name: inertia Type: Inertia relief Scale factor: 1
*Inertia Relief
** Name: tail-pres Type: Pressure Scale factor: 1.75
*Dsload, op=NEW
tail, P, 17.5
** Name: top-pres Type: Pressure Scale factor: 1.5
*Dsload, op=NEW
cockpit, P, 15.
*End Load Case
*****OUTPUT DEFINITION
*Output, field, variable=PRESELECT
*EL PRINT,elset=EALL
IRX,
IRA,
IRF,
IRRI,IRMASS
*End Step