桥式起重机金属结构的可靠性优化研究

Reliability-based Optimization for Overhead Traveling Crane Metal Structure

桥式起重机金属结构在设计阶段就需要兼顾轻量化与安全性能要求。以概率模型来简化影响结构可靠性的不确定因素,以可靠度来衡量结构的安全性,建立了桥机金属结构概率可靠性优化的数学模型,获得了兼顾轻量化和可靠性要求的最优解。可靠性优化设计方法既能实现桥式起重机金属结构的轻量化和安全可靠双重目标,是对优化设计方法的进一步创新,并弥补了优化设计的不足,既符合可靠性设计的要求,又能贴合绿色设计的节能环保理念。

In the design of overhead traveling crane metal structure, lightweight and reliability requirements need to be considered all together. Based on probabilistic model to describe the uncertain factors of the structure, and the reliability to measure the structural safety, mathematical model of probabilistic reliability-based optimization design is established, and then the optimization solution with the requirement of lightweight and reliability is obtained. As the further innovation of the conventional optimization, reliability-based optimization realized both structural lightweight and safety, which makes up for the deficiency of the conventional optimization. Reliability-based optimization for overhead traveling crane metal structure not only meets the requirements of reliability design, but also fits the concept of green design for energy-saving and environmental protection.