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Computation for move-limits with approximate function and its application in structure shape optimization

SUI Yun-kang,ZHANG Xuan,YU Hui-ping(Numerical Simulation Center for Engineering,Beijing University of Technology,Beijing 100022,China)  
Based on RSM(Response Surface Methodology),the objective function and constraint conditions are approximately explicit to overcome the difficulty of sensitivity analysis in two-dimensional continuum structures,sequential quadratic programming model is used.Combined with experiment design method,very few design points were used to obtain constraint conditions.In order to ensure the reliability of the optimization model,a second-order approximation function to each constraint function is researched and formed to compute move-limits for the current design point and adaptive move-limits evaluation is proposed.An example is given to show the efficiency and stability of this optimization strategy.
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