起重机臂架稳健可靠性优化设计

发布时间：2018-01-16 06:24

本文关键词：起重机臂架稳健可靠性优化设计　出处：《东北大学》2012年硕士论文　论文类型：学位论文

【摘要】：随着当今世界科技的飞速发展,各种大型或超大型的工程迅速增多,在满足起重机的起升高度更高、起升重量更大、作业幅度更广的要求的同时,起重机结构的轻量化已成为当前的一项重要研究内容。本文以某型履带起重机的臂架为例,应用稳健可靠性优化的设计思想,探讨研究了该型起重机臂架的优化问题。主要研究工作有以下几个方面：根据臂架的设计图纸及实际工作中的受载情况,利用有限元分析软件ANSYS的参数化编程语言APDL建立了臂架的有限元分析模型,对较危险工况进行了静力学分析,得到了臂架结构中各部分的应力分布情况,并对臂架的稳定性进行了校核；在臂架静力学分析的基础上,考虑各随机参数的离散性,应用有限元分析软件ANSYS的概率设计模块,对臂架进行了可靠性分析,通过可靠性分析得到臂架在一定置信度下的可靠度与可靠度对设计变量的灵敏度等相关信息。应用数值计算软件MATLAB,对臂架进行了稳健可靠性的优化设计,得到优化设计解。最后将该优化设计解重新应用ANSYS进行可靠性检验,检验结果表明该设计解满足稳健可靠性优化的基本要求,同时也说明了本研究方法的正确性与合理性。本文所采用的优化方法,可为起重机结构轻量化设计提供一定的参考,同时该方法亦具有一定的通用性,对于难以建立数学模型的机械产品进行稳健可靠性优化设计,提供了一种较为方便、实用和有效的技术手段,这也是本研究的意义所在。
[Abstract]:With the rapid development of science and technology in the world, a variety of large-scale or super-large projects are rapidly increasing, while meeting the requirements of higher lifting height, greater lifting weight and wider operation range of cranes. The lightening of crane structure has become an important research content at present. Taking the boom of a certain crawler crane as an example, the design idea of robust reliability optimization is applied in this paper. This paper discusses the optimization of the jib of this type crane. The main research work is as follows: according to the design drawings of the jib and the loading situation in the actual work. The finite element analysis model of the boom is established by using the parametric programming language APDL of the finite element analysis software ANSYS, and the statics analysis is carried out under the more dangerous working conditions. The stress distribution of each part of the boom structure is obtained, and the stability of the boom is checked. Based on the static analysis of the boom, considering the discreteness of the random parameters, the reliability of the boom is analyzed by using the probability design module of the finite element analysis software ANSYS. Through the reliability analysis, the reliability and the sensitivity of the reliability to the design variables are obtained under certain confidence. The numerical calculation software MATLAB is used to calculate the reliability and the sensitivity of the reliability to the design variables. The optimal design solution is obtained through the robust reliability optimization design of the boom. Finally, the optimal design solution is re-applied to verify the reliability of the boom with ANSYS. The test results show that the design solution meets the basic requirements of robust reliability optimization, and the correctness and rationality of the method are also demonstrated. The optimization method used in this paper can provide a certain reference for the lightweight design of crane structure, at the same time, this method is also universal. For mechanical products which are difficult to establish mathematical models for robust reliability optimization design, it provides a more convenient, practical and effective technical means, which is also the significance of this study.
【学位授予单位】：东北大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH21

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