圆柱螺旋弹簧可靠性优化设计

首先分析了圆柱螺旋弹簧静强度和疲劳强度可靠性模型建立方法,推导了其可靠性计算的公式和应力强度的分布形式.其次为充分发挥零件材料的效能同时又要考虑到零件的可靠性指标,以圆柱螺旋弹簧的质量为优化的目标函数,利用机械可靠性设计和机械最优化设计方法,在弹簧常规约束和可靠性约束基础上,建立了可靠性优化设计计算模型.最后,结合优化工具和上述优化模型对具体实例进行了应用计算,并分析对比了可靠性优化设计和常规优化设计的结果,说明所提可靠性优化设计方法实用、可靠,能最大程度地满足设计要求.

Reliability Optimization Design of Cylindrical Helical Spring

Firstly, the methodology for building up the model for the static strength and fatigue strength reliability of cylindrical helical spring is analyzed, and the computational formulas and distributions of the stress and strength are derived. Secondly, with the individual characteristics of mechanical optimization design and reliability, taking the spring''s mass as the objective function and based on the traditional constraints and reliability constraints of the spring, the mathematic model of reliability optimum design of cylindrical helical spring is established to make full use of the materials and consider the reliability of the part. At last, combing the optimal tools with the optimization model, the proposed method is applied to a practical example, the results of the reliability optimization and the traditional optimization are compared and analyzed, which show that the proposed method of the reliability optimization designing is practical, reliable and can satisfy the demands of designing to the full extent.