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将模糊优化与有限元法相结合,并考虑回转窑筒体厚度、制造成本、筒体变形、疲劳强度等约束条件的模糊因素,建立了筒体结构优化模型,为了区分目标和约束的不同重要程度,引入了广义水平截集法,将模糊约束转化为普通约束,并应用子问题近似法进行求解。应用实例表明:筒体结构优化,减小了筒壳的最大等效应力、最大支承力及筒体的变形椭圆度,增大了筒体的疲劳安全系数,增强了筒体抗御突变载荷的能力。
Combining the fuzzy optimization with the finite element method and considering the fuzzy factors such as cylinder body thickness, manufacturing cost, cylinder deformation, fatigue strength and other constraints, a cylinder structure optimization model is established. In order to distinguish the different importance of the target and the constraint , A generalized horizontal cut-off method is introduced, the fuzzy constraints are transformed into ordinary constraints, and the sub-problem approximation method is used to solve the problem. The application examples show that the optimization of the cylinder structure can reduce the maximum equivalent stress, the maximum supporting force and the deformation ellipticity of the cylinder shell, increase the fatigue safety coefficient of the cylinder body and enhance the ability of the cylinder body to resist sudden load .