Based on fully stressed criterion, a mathematical model for spring optimization design has been built. The model is a constrained nonlinear programming problem.
按满应力准则建立了弹簧优化设计的数学模型，它是一个有约束的非线性规划问题。
The fully stressed design criterion is approximate and the stress ratio algorithm must be used repeatedly.
满应力设计准则是近似的，同时必须循环运用应力比算法。
The fully stressed design criterion is approximate and the stress ratio algorithm must be used repeatedly.
满应力设计准则是近似的，同时必须循环运用应力比算法。
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