船体应力释放孔的优化

Optimization of stress release hole for ship hull

对部分应力集中十分严重的船体结构区域,可以通过设置应力释放孔的方法来控制其应力峰值。为了最大程度地改善关注区域应力峰值,以应力释放孔的形状、尺寸和位置等参数为设计变量,以开孔边界、施工工艺和非优化区域应力水平为约束条件,以优化区域的材料屈服利用因子最低为目标,对应力释放孔进行形状优化和尺寸优化。基于Isight平台,集成应力释放孔的参数化建模程序,采用遗传算法迭代求解,可得到最优设计方案。

For some ship structure areas with serious stress concentration,their peak stress can be reduced by means of arranging a stress release hole.In order to improve the peak stress at concerned locations as far as possible,the shape and size optimization of stress release hole is carried out.The shape,size and location parameters are selected as design variables,opening boundary,manufacturing practice and stress level of non-optimization area are selected as constraints,and minimizing stress utilization factor of optimization area is selected as objection.Based on the Isight software platform,parametric procedure of stress release hole is integrated.After solving the optimization with genetic algorithm,an optimal design of stress release hole can be obtained.