可靠性约束显式化的结构优化设计

Structural optimal design by displaying the reliability constraints

文中提出了一种在随机荷载作用下结构可靠性约束显式化的优化设计方法。通过映射变换将各种非高斯型随机荷载当量高斯化,利用弹性结构体系对高斯荷载反应的不变性,将位移、应力等可靠性约束等价处理为常规约束。最后应用结构优化设计混合方法求解。计算表明:文中给出的结构可靠性优化方法简单且行之有效,并具有许多优点。

An approach to structural optimal design by displaying the reliability constraints is pro- posed. Through the Normal tail transformation the various non--Normal random loads acting upon structure are equivalent to the Normal type, and then by using the invariance with which the linear elastic structures respond to the Normal load, the reliability constraints of displace- ment and stress are equivalently treated as conventional formsl. Finally the problem is solved with the mixed method of structural optimization.