Abstract
Some articles that concern simulation and optimization for electromagnetism and mechanics are introduced. Many technologies on them, for example, large scale simulation, coupled simulation, and topology optimization in design are extremely progressing. Model sizes for simulation and optimization are becoming larger and larger with increasing computer performance. Therefore, useful design information can be obtained. In addition, design tools which can get solution to make a decision for design easily and quickly in early design stage are also progressing. Many simulation and optimization tools are widely diffused in designing machines. It is important for good design to select and use suitable tools.
