*HEADING EC3KSFE2: EIGENVALUE ANALYSIS OF AN UNCONSTRAINED PATCH OF ELEMENTS [C3D20] *PREPRINT,ECHO=YES,HISTORY=NO,MODEL=NO *NODE 10, 0.,0.,1. 30, 1.,0.,1. 70, 0.,0.,0. 90, 1.,0.,0. 210, 0.,1.,1. 230, 1.,1.,1. 270, 0.,1.,0. 290, 1.,1.,0. 1010, .32,.186,.643 1030, .677,.305,.683 1070, .249,.342,.192 1090, .826,.288,.288 1210, .165,.745,.702 1230, .788,.693,.644 1270, .273,.750,.230 1290, .850,.649,.263 *NGEN 10,30,10 70,90,10 10,70,30 20,80,30 30,90,30 210,230,10 270,290,10 210,270,30 220,280,30 230,290,30 10,210,100 20,220,100 30,230,100 40,240,100 60,260,100 70,270,100 80,280,100 90,290,100 ***** 1010,1030,10 1070,1090,10 1010,1070,30 1020,1080,30 1030,1090,30 1210,1230,10 1270,1290,10 1210,1270,30 1220,1280,30 1230,1290,30 1010,1210,100 1020,1220,100 1030,1230,100 1040,1240,100 1060,1260,100 1070,1270,100 1080,1280,100 1090,1290,100 ***** 10,1010,500 20,1020,500 30,1030,500 40,1040,500 50,1050,500 60,1060,500 70,1070,500 80,1080,500 90,1090,500 110,1110,500 120,1120,500 130,1130,500 140,1140,500 160,1160,500 170,1170,500 180,1180,500 190,1190,500 210,1210,500 220,1220,500 230,1230,500 240,1240,500 250,1250,500 260,1260,500 270,1270,500 280,1280,500 290,1290,500 ***** *ELEMENT,TYPE=C3D20, ELSET=EALL 1, 10,30,90,70, 1010,1030,1090,1070, 20,60,80,40, 1020,1060,1080, 1040, 510,530,590,570 2, 10,1010,1070,70, 210,1210,1270,270, 510,1040,570,40, 710,1240,770, 240, 110,1110,1170,170 3, 1010,1030,1090,1070,1210,1230,1290,1270,1020,1060,1080,1040,1220,1260,1280, 1240, 1110,1130,1190,1170 4, 1030,30,90,1090, 1230,230,290,1290, 530,60,590,1060, 730,260,790, 1260, 1130,130,190,1190 5, 1210,1230,1290,1270, 210,230,290,270, 1220,1260,1280,1240, 220,260,280, 240, 710,730,790,770 6, 1070,1090,90,70, 1270,1290,290,270, 1080,590,80,570, 1280,790,280, 770, 1170,1190,190,170 7, 10,30,1030,1010, 210,230,1230,1210, 20,530,1020,510, 220,730,1220, 710, 110,130,1130,1110 ***** *SOLID SECTION,MATERIAL=A1, ELSET=EALL *MATERIAL,NAME=A1 *ELASTIC,TYPE=ISOTROPIC 1.E6,.25 *DENSITY 7.5E-4, *STEP *FREQUENCY, eigensolver=lanczos, SIM=NO 9, , ,-1.E7 *OUTPUT,FIELD *MODAL OUTPUT *CONTROLS,PARAMETERS=FIELD 1.E-14, 1., 10000. , , 1.E-12 *END STEP *STEP,NLGEOM *STATIC *DLOAD 1, P1, -10000. 2, P6, -10000. 4, P4, -10000. 5, P2, -10000. 6, P5, -10000. 7, P3, -10000. *BOUNDARY 10,1,2 70,1,3 90,2,3 270,1 270,3 *EL PRINT,FREQ=0 *NODE PRINT U,RF *END STEP *STEP,NLGEOM *FREQUENCY, eigensolver=lanczos, SIM=NO 10, , , -1.E+7 *OUTPUT,FIELD *MODAL OUTPUT *EL PRINT,FREQ=0 *NODE PRINT,FREQ=0 *BOUNDARY,OP=NEW *END STEP