LS-TaSC 4.0

Version 4, started in the summer of 2016, is a major release focusing on incorporating design for natural frequency using modern mathematical programming techniques. It contains the following major features:

• Design for natural frequency,
• A multidisciplinary design optimization formulation considering the simultaneous design for large deformation, static, and NVH load cases, and
• The projected subgradient design optimization method enabling the above for huge FEA models.

It also contains the following minor features:

• Good convergence for small mass fractions (e.g. 0.02) using the projected subgradient method.
• Different material models can be used in the different disciplines.
• The element deletion behavior can be set to be different for implicit and explicit cases.
• Support for encrypted data is allowed. It won’t be parsed, but will be passed on to LS-DYNA.
• Small unconnected regions can be automatically be deleted.
• For the multi-tensor scheme some defaults were changed to allow for fewer function evaluations. The starting iteration may be set and it can be controlled whether the load case weights will be used as global variables.