为什么设置层合板每层厚度为变量进行优化,会出现这样的情况
The function defined in field “Mat-L_T1”as design variable is either nonlinear or is of the vaild linear format 。The function must be of the following form:“c0+c1*d1+c2*d2....."优化分析会出现这样的提示,这是什么情况?我该怎么做?谢谢各位的帮助!!!
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