环箍连接结构参数化有限元优化设计

Optimization design of structure parameters of ring hoop connection

在水下航行体大段联接中,环箍连接已经取代了螺钉联接,在实际中得到了广泛的应用。利用ADPL语言对ANSYS软件进行二次开发,建立环箍连接结构的参数化有限元模型,在应用过程中为提高该连接结构的强度,要严格操作程序,坚持采用环箍径向和轴向尺为设计变量,把结构最大应力比作为应用的目标函数,进一步优化数学模型,科学应用一阶优化法进行求解,通过优化,结果表明,拉伸载荷下结构的最大等效应力较优化前降低15.17%,结构的安全系数较优化前有效的提高17.8%,基本实现了环箍连接结构设计中精确计算代替近似计算,用优化设计代替经验设计。

The parameters finite element model of the hoop ring connecting structure is establishing using ANSYS parametric parameters design language（ADPL）.For enhancing the joint strength, the calculation considered the hoop ring dimension and filleting radius as design variables, took the maximal stress ratio as objective function to establish the optimization mathematics model, the optimization problem was solved using gradient method .the optimitation result showed the maximal Mises stress of the optimum structure was 15.17% less than that of the initial structure, and that safety coefficient of the optimum structure raised to 17.8% under lensile loading. In addition, The optimum structure was more rigid than the initial strcture . Thus, the optimization method combined with nonlinear FEM can be used to design the joint structure and enhance structure strength.