*HEADING
 RESPONSE SPECTRUM ANALYSIS - /STANDARD VERIFICATION, 2D CONNECTORS
**
*NODE, NSET=NALL
 1,0.0,0.0,  
 2,1.0,0.0,
 3,2.0,0.0,
 4,3.0,0.0,
*NSET, NSET=FIXED
 1,4
*PARAMETER
 C=1.0
 KROT1=1.0E3
 UR1=1.0E-3
 KROT2=KROT1/10
 UR2=100*UR1
 M1=KROT1*UR1
 M2=M1+KROT2*(UR2-UR1)
 mM1=-M1
 mM2=-M2
 mUR1=-UR1
 mUR2=-UR2
**
** CONNECTOR ELEMENTS
**
*ELEMENT, TYPE=CONN2D2, ELSET=ROT
 1,1,2
 2,2,3
*ELEMENT, TYPE=CONN2D2, 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
 ROTATION
*CONNECTOR SECTION, ELSET=ACTUATOR
 ROTATION
**
** CONNECTOR BEHAVIOR DEFINITIONS
**
*CONNECTOR BEHAVIOR, NAME= CB_ROT
*CONNECTOR ELASTICITY, COMPONENT=6, NONLINEAR
 <mM2>,<mUR2>
 <mM1>,<mUR1>
 <M1>,<UR1>
 <M2>,<UR2>
*CONNECTOR DAMPING, COMPONENT=6
 <C>,
**
** BOUNDARY CONSTRAINTS (BASE STATE)
**
*BOUNDARY
 NALL,5,5
 FIXED,6,
**
**
*PSD-DEFINITION, NAME=WHITE, TYPE=FORCE
 1.0,0.0,0.0
 1.0,0.0,60.0
**
**
*STEP
 STEP-1: OBTAIN NATURAL MODES OF THE 2-D.O.F. SYSTEM
*FREQUENCY, EIGENSOLVER=SUBSPACE,SIM=NO
 2,
**
*OUTPUT, FIELD
*NODE OUTPUT
 U,RF
*ELEMENT OUTPUT, ELSET=CONNECTORS
 CTF,CEF,CU
*NODE PRINT
 UR3,RM3
*EL PRINT, ELSET=ROT
 CTM3,CEM3,CRM3
 CUR3,
*EL PRINT, ELSET=ACTUATOR
 CTM3,CEM3,CRM3
 CUR3,
*NODE FILE
 U,RF
*EL FILE, ELSET=CONNECTORS
 CTF,CEF,CRF,CU
*END STEP
**
**
*STEP
 STEP-2: RANDOM RESPONSE
**
*RANDOM RESPONSE
 12.0,60.0,20,3,0
**
*MODAL DAMPING, MODAL=DIRECT
 1,2,0.02
*SELECT EIGENMODES
 1,2
*CONNECTOR LOAD, LOAD CASE=1
 ACTUATOR,6,-1.0
*CONNECTOR LOAD, LOAD CASE=2
 ACTUATOR,6,-1.0  
**
*CORRELATION, PSD=WHITE, TYPE=UNCORRELATED, COMPLEX=NO
 1,1
 2,1
**
*OUTPUT, FIELD
*NODE OUTPUT
 U,RU,RF,RRF
*ELEMENT OUTPUT, ELSET=CONNECTORS
 CTF,CEF,CU
*OUTPUT, HISTORY
*ELEMENT OUTPUT, ELSET=CONNECTORS
 CTM3,CEM3,CRM3,RCTM3,RCEM3,RCRM3
 CUR3,RCUR3
*NODE PRINT, FREQUENCY=1
 UR3,VR3,AR3,TUR3,TVR3,TAR3
 RUR3,RVR3,RAR3,RTUR3,RTVR3,RTAR3
 CM3,RM3,RRM3
*EL PRINT, ELSET=ROT, FREQUENCY=1
 CTM3,CEM3,CRM3,RCTM3,RCEM3,RCRM3
 CUR3,RCUR3
*EL PRINT, ELSET=ACTUATOR, FREQUENCY=1
 CTM3,CEM3,CRM3,RCTM3,RCEM3,RCRM3
 CUR3,RCUR3
*NODE FILE
 U,RU,RF,RRF
*EL FILE, ELSET=CONNECTORS
 CTF,CEF,CRF,RCTF,RCEF,RCRF
 CU,RCU
*END STEP