汽车起重机臂架结构分析与优化设计研究

发布时间：2018-05-05 17:14

本文选题：汽车起重机 + 截面参数　；参考：《兰州理工大学》2011年硕士论文

【摘要】：随着国内基础设施建设步伐的不断加快,用于起重作业的汽车起重机在整个工程机械领域中显得越来越重要,同时对汽车起重机的起重能力、安全性要求也越来越高。臂架结构作为起重机的主要受力构件,其强度、刚度、稳定性直接影响整机的性能,而影响臂架力学性能最关键的因素为其截面形式,汽车起重机臂架截面形式经过多年的不断优化改进,当前国内较为先进的臂架截面形式主要为U型。本文研究的内容为截面形式为U型的新型汽车起重机臂架结构。首先,结合起重机设计规范用传统解析法求解臂架结构的力学特性,在此理论结果的基础上初步评价整个臂架设计的合理性。然后,运用ANSYS Workbench软件对臂架结构进行有限元静力学分析和屈曲分析,从分析结果中提取应力云图、位移云图、模态图,通过观察这些结果数据来判断臂架结构设计是否满足强度、刚度、稳定性的要求以及预测未来臂架的失稳状态,这些分析结果为臂架结构改造提出理论依据。最后,以应力为目标,质量为参照对现有的截面形式进行优化,最终得到改进的截面形式,这种新的截面形式不仅提高了臂架的力学性能还节约了材料。本文特点是运用了传统方法和现代方法相结合的手段来研究U型臂架的性能,能更全面地为结构的再设计提供理论依据,本文的研究的成果已经应用到该型号的汽车起重机产品中。
[Abstract]:With the rapid pace of infrastructure construction in China, the crane used for lifting operation is becoming more and more important in the whole engineering machinery field. At the same time, the lifting capacity and safety requirements of the truck crane are becoming higher and higher. The arm frame structure is the main force component of the crane, and its strength, stiffness and stability have a direct impact on the crane. The most important factor affecting the mechanical performance of the arm is its cross section form. The cross section of the truck crane boom has been improved by many years, and the most advanced section of the brachial frame in China is the U type.
The contents of this paper are the structure of a new type of truck crane arm frame with section U. First, the mechanical characteristics of the arm structure are solved by the traditional analytic method combined with the crane design code. On the basis of the theoretical results, the rationality of the whole arm frame design is evaluated preliminarily. Then, the arm frame structure is carried out by using the software of ANSYS Workbench. The finite element statics analysis and buckling analysis are used to extract the stress cloud, displacement cloud, and modal. By observing these data to determine whether the arm structure design meets the strength, stiffness, stability and prediction of the instability of the arm frame, the analysis results provide the theoretical basis for the reconstruction of the arm structure. After that, the existing cross section form is optimized with the aim of stress and the quality as the reference. Finally, the improved cross section form is obtained. This new section not only improves the mechanical properties of the arm, but also saves the material.
The characteristics of this paper are the use of the combination of traditional methods and modern methods to study the performance of the U type arm frame, and can provide a more comprehensive theoretical basis for the redesign of the structure. The results of this study have been applied to this type of automobile crane products.

【学位授予单位】：兰州理工大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH213.6

【引证文献】