/IMPL/RREF/INTERF/n

Engine Keyword

/IMPL/RREF/INTERF/N – Special Reference Residual Computation with Contact

Description

Different reference force residual computations used for stop criteria on nonlinear analysis with contact.

Format

/IMPL/RREF/INTERF/N

Data

Description

= 0: aggressive (modified entirely by the out-of-balance value)

= 1: average (modified each time 200% maximum)

= 2: light (modified each time 20% maximum)

= 3: no change

= 4: no change - except for the first contact

= 5: modified automatically (imposed displacement only)

Comments

An appropriate reference value in contact analysis is delicate to compute (especially in simulations involving rigid parts with imposed displacement impacting a deformable part). RADIOSS makes an exception by modifying the reference value (generally at iteration number one). Too large of a reference value has been received in some cases; resulting in a wrong convergence; in other cases, a very small reference value results in failure of the convergence. This new keyword directs you to the appropriate choice for their simulations.