Why am I not getting complex frequencies in ANSYS 9.0 with the qrdamp modal
solver and a model with friction (no damping.)

Here are the requirements to model brake squeal due to sliding friction:

1. Contact must have a sliding status at the end of the static analysis

2. The static analysis must be run with NLGEOM,ON and NROPT,UNSYM

3. The modal must be run with PSOLVEs:


4. The complex key must be set to on:


In your input the complex key wasn't set,

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