论文部分内容阅读
本文提出一个干切口式连杆结构最优化设计的数学模型及其计算程序。采用这个最优化模型,可以获取满足强度、刚度等各种设计要求而又最轻的一个最佳连杆结构方案,从而可以在电子计算机上实现连杆结构的自动化设计。在本文所叙述的连杆最优化设计方法中,对于连杆的结构分析采用了有限无法数值计算技术。最优化设计的目标函数选为连杆的重量,将连杆应力、变形和疲劳安全系数的设计限制作为约束条件,求解这一非线性规划问题采用了罚函数法。文中还以一台高速柴油机连杆结构的最优化设计为例,介绍这种方法的应用。
In this paper, a mathematical model of the optimal design of dry-cut linkages and its calculation program are proposed. Adopting this optimization model, one of the lightest connecting rod structures that can meet various design requirements such as strength and stiffness can be obtained, which can realize the automation design of connecting rod structure on the electronic computer. In this paper, the link optimization design method described for the structural analysis of the link using finite non-numerical techniques. The objective function of the optimal design was chosen as the weight of the connecting rod. The constraints of the design stress, deformation and fatigue safety factor of the connecting rod were taken as constraints. The penalty function method was adopted to solve this nonlinear programming problem. In this paper, the optimal design of a high-speed diesel engine connecting rod structure is also taken as an example to introduce the application of this method.