*HEADING CONNECTOR FRICTION BEHAVIOR IN LINEAR DYNAMICS PROCEDURES /STANDARD VERIFICATION, 3D CONNECTORS ** *NODE, NSET=NALL 1,0.0,0.0, 2,1.0,0.0, 3,2.0,0.0, 4,3.0,0.0, *PARAMETER C=1.0 K=100.0 ** ** CONNECTOR ELEMENTS ** *ELEMENT, TYPE=CONN3D2, ELSET=ROT 1,1,2 2,2,3 *ELEMENT, TYPE=CONN3D2, ELSET=ACTUATOR 3,3,4 *ELSET, ELSET=CONNECTORS ROT,ACTUATOR ** ** ROTARY INERTIA ** *ELEMENT, TYPE=ROTARYI, ELSET=ROTARY 1001,1 1002,2 1003,3 1004,4 ** ** SECTION DEFINITIONS ** *ROTARY INERTIA, ELSET=ROTARY ,,1.0, *CONNECTOR SECTION, ELSET=ROT, BEHAVIOR=CB_ROT CARDAN GLOBAL, *CONNECTOR SECTION, ELSET=ACTUATOR CARDAN GLOBAL, *ORIENTATION, NAME=GLOBAL 1.0,0.0,0.0,0.0,1.0,0.0 ** ** CONNECTOR BEHAVIOR DEFINITIONS ** *CONNECTOR BEHAVIOR, NAME=CB_ROT *CONNECTOR ELASTICITY, COMPONENT=6 , *CONNECTOR DAMPING, COMPONENT=6 , *CONNECTOR STOP, COMPONENT=6 -0.14, 0.14 ** ** BOUNDARY CONSTRAINTS (BASE STATE) ** *CONNECTOR MOTION ROT,4 ROT,5 ACTUATOR,4 ACTUATOR,5 *BOUNDARY NALL,1,3 1,6, 4,4,6, ** ** *STEP STEP-1: OBTAIN NATURAL MODES OF THE 2-D.O.F. SYSTEM ** *FREQUENCY, SIM=NO 2, ** *OUTPUT, FIELD *NODE OUTPUT U,RF *ELEMENT OUTPUT, ELSET=CONNECTORS CU,CTF *NODE PRINT UR3,RM3 *EL PRINT, ELSET=ROT CTM3,CEM3,CRM3 CUR3, CSLST *EL PRINT, ELSET=ACTUATOR CTM3,CEM3,CRM3 CUR3, *NODE FILE U,RF *EL FILE, ELSET=CONNECTORS CTF,CEF,CRF,CU CSLST, *END STEP ** ** *STEP STEP-2: OBTAIN STEADY STATE DYNAMIC RESPONSE IN TERMS OF PHYSICAL DEGREES OF FREEDOM - DIRECT ** USE CONNECTOR LOAD ** *STEADY STATE DYNAMICS, DIRECT, INTERVAL=EIGENFREQUENCY 12, 60 ** *CONNECTOR LOAD, REAL ACTUATOR,6,-1.0 *CONNECTOR LOAD, IMAGINARY ACTUATOR,6,-1.0 ** *OUTPUT, FIELD *NODE OUTPUT U,RF *ELEMENT OUTPUT, ELSET=CONNECTORS CU,CTF *OUTPUT, HISTORY *ELEMENT OUTPUT, ELSET=CONNECTORS CTM3,CEM3,CVM3,CRM3 CUR3, CSLST, *NODE PRINT, FREQUENCY=1 UR3,VR3,AR3,PUR3 CM3,RM3 *EL PRINT, ELSET=ROT, FREQUENCY=1 CTM3,CEM3,CVM3,CRM3 PHCTM3,PHCEM3,PHCVM3,PHCRM3 CUR3,PHCUR3 CSLST *EL PRINT, ELSET=ACTUATOR, FREQUENCY=1 CTM3,CEM3,CVM3,CRM3 PHCTM3,PHCEM3,PHCVM3,PHCRM3 CUR3,PHCUR3 *NODE FILE U,RF *EL FILE, ELSET=CONNECTORS CTF,CEF,CVF,CRF PHCTF,PHCEF,PHCVF,PHCRF CU,PHCU CSLST, *END STEP ** ** *STEP, NLGEOM STEP-3: CHANGE THE BASE STATE - STOP CONNECTOR 1 ** *STATIC 0.05,1.0,,0.1 *CLOAD 2,6,20.0 ** *OUTPUT, FIELD *NODE OUTPUT U,RF *ELEMENT OUTPUT, ELSET=CONNECTORS CU,CTF *ELEMENT OUTPUT NFORC,ELEN *OUTPUT, HISTORY *ELEMENT OUTPUT, ELSET=CONNECTORS CTM3,CEM3,CVM3,CRM3 CUR3,CPR3 CSLST, *NODE PRINT, FREQUENCY=1 UR3,CM3,RM3 *EL PRINT, ELSET=ROT, FREQUENCY=1 CTM3,CEM3,CVM3,CRM3 CUR3,CPR3 CSLST *EL PRINT, ELSET=ACTUATOR, FREQUENCY=1 CTM3,CEM3,CVM3,CRM3 CUR3,CPR3 *NODE FILE U,RF *EL FILE, ELSET=CONNECTORS CTF,CEF,CVF,CRF,CP,CU CSLST, *END STEP ** ** REPEAT ALL STEPS ** *STEP STEP-4: OBTAIN NATURAL MODES OF THE 2-D.O.F. SYSTEM ** *FREQUENCY, SIM=NO 1, ** *OUTPUT, FIELD *ELEMENT OUTPUT, ELSET=CONNECTORS CU,CTF *OUTPUT, FIELD *NODE OUTPUT U,RF *NODE PRINT UR3,RM3 *EL PRINT, ELSET=ROT CTM3,CEM3,CRM3 CUR3, CSLST *EL PRINT, ELSET=ACTUATOR CTM3,CEM3,CRM3 CUR3, *NODE FILE U,RF *EL FILE, ELSET=CONNECTORS CTF,CEF,CRF,CU CSLST, *END STEP ** ** *STEP STEP-5: OBTAIN STEADY STATE DYNAMIC RESPONSE IN TERMS OF PHYSICAL DEGREES OF FREEDOM - DIRECT ** USE CONNECTOR LOAD ** *STEADY STATE DYNAMICS, DIRECT, INTERVAL=EIGENFREQUENCY 12, 60 ** *CONNECTOR LOAD, REAL ACTUATOR,6,1.0 *CONNECTOR LOAD, IMAGINARY ACTUATOR,6,1.0 ** *OUTPUT, FIELD *NODE OUTPUT U,RF *ELEMENT OUTPUT, ELSET=CONNECTORS CU,CTF *OUTPUT, HISTORY *ELEMENT OUTPUT, ELSET=CONNECTORS CTM3,CEM3,CVM3,CRM3 CUR3, CSLST, *NODE PRINT, FREQUENCY=1 UR3,VR3,AR3,PUR3 CM3,RM3 *EL PRINT, ELSET=ROT, FREQUENCY=1 CTM3,CEM3,CVM3,CRM3 PHCTM3,PHCEM3,PHCVM3,PHCRM3 CUR3,PHCUR3 CSLST *EL PRINT, ELSET=ACTUATOR, FREQUENCY=1 CTM3,CEM3,CVM3,CRM3 PHCTM3,PHCEM3,PHCVM3,PHCRM3 CUR3,PHCUR3 *NODE FILE U,RF *EL FILE, ELSET=CONNECTORS CTF,CEF,CVF,CRF PHCTF,PHCEF,PHCVF,PHCRF CU,PHCU CSLST, *END STEP ** ** *STEP, NLGEOM STEP-6: CHANGE THE BASE STATE ** *STATIC 0.05,1.0,,0.1 *CLOAD 2,6,10.0 ** *OUTPUT, FIELD *NODE OUTPUT U,RF *ELEMENT OUTPUT, ELSET=CONNECTORS CU,CTF *ELEMENT OUTPUT NFORC,ELEN *OUTPUT, HISTORY *ELEMENT OUTPUT, ELSET=CONNECTORS CTM3,CEM3,CVM3,CRM3 CUR3,CPR3 CSLST, *NODE PRINT, FREQUENCY=1 UR3,CM3,RM3 *EL PRINT, ELSET=ROT, FREQUENCY=1 CTM3,CEM3,CVM3,CRM3 CUR3,CPR3 CSLST *EL PRINT, ELSET=ACTUATOR, FREQUENCY=1 CTM3,CEM3,CVM3,CRM3 CUR3,CPR3 *NODE FILE U,RF *EL FILE, ELSET=CONNECTORS CTF,CEF,CVF,CRF,CP,CU CSLST, *END STEP ** ** REPEAT ALL STEPS ** *STEP STEP-7: OBTAIN NATURAL MODES OF THE 2-D.O.F. SYSTEM ** *FREQUENCY, SIM=NO 1, ** *OUTPUT, FIELD *NODE OUTPUT U,RF *ELEMENT OUTPUT, ELSET=CONNECTORS CU,CTF *NODE PRINT UR3,RM3 *EL PRINT, ELSET=ROT CTM3,CEM3,CRM3 CUR3, CSLST *EL PRINT, ELSET=ACTUATOR CTM3,CEM3,CRM3 CUR3, *NODE FILE U,RF *EL FILE, ELSET=CONNECTORS CTF,CEF,CRF,CU CSLST, *END STEP ** ** *STEP STEP-8: OBTAIN STEADY STATE DYNAMIC RESPONSE IN TERMS OF PHYSICAL DEGREES OF FREEDOM - DIRECT ** USE CONNECTOR LOAD ** *STEADY STATE DYNAMICS, DIRECT, INTERVAL=EIGENFREQUENCY 12, 60 ** *CONNECTOR LOAD, REAL ACTUATOR,6,1.0 *CONNECTOR LOAD, IMAGINARY ACTUATOR,6,1.0 ** *OUTPUT, FIELD *NODE OUTPUT U,RF *ELEMENT OUTPUT, ELSET=CONNECTORS CU,CTF *OUTPUT, HISTORY *ELEMENT OUTPUT, ELSET=CONNECTORS CTM3,CEM3,CVM3,CRM3 CUR3, CSLST, *NODE PRINT, FREQUENCY=1 UR3,VR3,AR3,PUR3 CM3,RM3 *EL PRINT, ELSET=ROT, FREQUENCY=1 CTM3,CEM3,CVM3,CRM3 PHCTM3,PHCEM3,PHCVM3,PHCRM3 CUR3,PHCUR3 CSLST *EL PRINT, ELSET=ACTUATOR, FREQUENCY=1 CTM3,CEM3,CVM3,CRM3 PHCTM3,PHCEM3,PHCVM3,PHCRM3 CUR3,PHCUR3 *NODE FILE U,RF *EL FILE, ELSET=CONNECTORS CTF,CEF,CVF,CRF PHCTF,PHCEF,PHCVF,PHCRF CU,PHCU CSLST, *END STEP