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Hi, I am running a Frequency Response Analysis. When I change the EIGRL entry to EIGRA, I get following error. *** ERROR # 3432 *** Singularity found in construction of constraint equations. Usually this happens when a dof is defined as slave in more than one constraints. For inertia relief analysis this problem may be overcome with SUPORT definitions and/or PARAM,COUPMASS,1. This error occurs in module "asmbdrv". How this can be resolved ?
I am attempting to move the midside nodes to the quarter points to capture the 1/sqrt® singularity for a crack tip model. I have created nodes at the quarter points but cannot figure out how to move the midside nodes from the half point to the quarter point. I have tried using morph selecting the fixed nodes and moving nodes as well as node edit but have not had any luck. Does anyone know of a way to do this? Thank you, -Clay