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September 5, 2024 at 7:30 pm
24M1667
Subscriber! Define parameters*SET, M1, 1.0Â Â Â Â ! Mass 1*SET, M2, 1.0Â Â Â Â ! Mass 2*SET, M3, 1.0Â Â Â Â ! Mass 3*SET, M4, 1.0Â Â Â Â ! Mass 4*SET, K1, 10.0Â Â Â ! Spring constant 1*SET, K2, 10.0Â Â Â ! Spring constant 2*SET, K3, 10.0Â Â Â ! Spring constant 3*SET, K4, 10.0Â Â Â ! Spring constant 4*SET, C, 0.5Â Â Â Â ! Damping coefficientÂ! Define the model/FILNAME, FourMassSystem, 1/PREP7Â! Create nodesN, 1, 0, 0N, 2, 1, 0N, 3, 2, 0N, 4, 3, 0Â! Create elements (Spring elements)ET, 1, LINK180R, 1, K1R, 2, K2R, 3, K3R, 4, K4KEYOPT, 1, 1, 1KEYOPT, 2, 1, 1KEYOPT, 3, 1, 1KEYOPT, 4, 1, 1Â! Define element connectivityE, 1, 2E, 2, 3E, 3, 4Â! Define mass and dampingMP, EX, 1, K1MP, EX, 2, K2MP, EX, 3, K3MP, EX, 4, K4MP, D, 1, CÂ! Define boundary conditionsD, 1, ALL, 0D, 4, ALL, 0Â! Apply loads (forces)F, 2, FX, F0 * SIN(omega * t)F, 3, FX, F0 * COS(omega * t)Â! Solution/SOLUANTYPE, 4SOLVEÂ! Post-processing/POST1PLDISP, 2Â -
September 9, 2024 at 3:12 pm
mrife
Ansys Employee@24M1667
There is no question posted here....but if I had to guess an answer it is that Link180 does not use real constants to define the stiffess. It uses sections.
Mike
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