求助大神

1170179861@qq.c

请教大神，使用optistruct做size优化时设置了static stress作为response，为什么会出现“Stress/strain/force response is applied to topology or free-size domain. For stress-constrained topology or free-size optimization, please use the STRESS option on the design variable definition card.”？教程上也是用static stress作为约束条件的。