大吨位全路面起重机利用有限元进行性能计算程序开发

发布时间：2018-10-22 10:21

【摘要】：全地面起重机是一种兼有汽车起重机和越野起重机特点的高性能产品,在机动性能优越的条件下,全地面起重机也在向大吨位发展,以满足更多的吊装工况需求。在2003年以前中国市场上所有全地面起重机均靠进口,自2003年徐工推出25吨全地面起重机以后,徐工集团又在2008年上海BUMA工程机械展推出QAY400和QAY500全地面起重机,到2010年上海BUMA中国企业已经有徐工集团、三一重工展出千吨级全地面起重机,中联重工也推出400吨、500吨全地面起重机,至此,我国全地面起重机在大吨位方面已经达到国际先进水平。在全地面起重机快速发展的背景下,如何保证产品的安全、稳定对技术方面提出了更高的要求,外国的产品虽然可以给我们提供参考,但是产品设计的核心技术仍然需要自己来研究。大吨位产品在臂架结构规模,结果形式以及吊装工况的复杂性上远不是以前小吨位起重机所能比的,而对大吨位全地面起重机结构强度的精确计算是保证产品质量的重要步骤。本文讨论的方法是利用简化梁模型计算起重机臂架结构,在计算时考虑设备工作的极限载荷,考虑设备受载后大变形影响,其计算精度得到了实验验证。此外,在以前解析法性能计算方法的基础上,利用有限元计算模型进行计算并提取性能控制项,计算对应车型设计方案下的吊装性能,从而实现了多工况批处理性能计算,有效地提高了设计计算的精度和速度。此套程序已经在徐工集团大吨位全地面起重机的开发中得到应用,而且其有效性已经得到验证。此外,此套程序的方法有利于实现参数化,在此程序基础上针对大吨位全地面起重机有限元分析的参数化程序也已经完成并得到应用。
[Abstract]:The all-ground crane is a kind of high performance product with the characteristics of both automobile crane and off-road crane. Under the condition of superior maneuverability, the all-ground crane is also developing to large tonnage to meet more requirements of hoisting condition. Before 2003, all the all-ground cranes in the Chinese market were imported. After Xugong introduced 25 tons of all-ground cranes in 2003, Xugong Group launched QAY400 and QAY500 all-ground cranes at the Shanghai BUMA Engineering Machinery Exhibition in 2008. By 2010, Shanghai BUMA Chinese enterprises had Xugong Group, Sany heavy Industry exhibited 1000 tons of all-ground cranes, and Zhonglian heavy Industries also launched 400-ton, 500-ton all-ground cranes, so far. The all-ground crane in our country has reached the international advanced level in large tonnage. In the context of the rapid development of all-ground cranes, how to ensure the safety and stability of products puts forward higher requirements on technology. Although foreign products can provide us with reference, But the core technology of product design still needs to be researched. The structure scale, the result form and the complexity of hoisting condition of large tonnage crane are far beyond those of small tonnage crane before, and the accurate calculation of structural strength of large tonnage crane is an important step to guarantee the product quality. In this paper, the simplified beam model is used to calculate the jib structure of the crane. The calculation accuracy is verified by experiments, in which the limit load of the equipment is taken into account, and the influence of large deformation after the load on the equipment is taken into account. In addition, on the basis of the previous analytical method, the finite element model is used to calculate and extract the performance control items, and the hoisting performance of the corresponding vehicle design scheme is calculated, thus realizing the multi-condition batch processing performance calculation. The precision and speed of design and calculation are improved effectively. This program has been applied in the development of large tonnage all-ground crane in Xugong Group, and its validity has been verified. In addition, the method of this program is helpful to realize parameterization. Based on this program, the parameterized program for finite element analysis of large-tonnage all-ground crane has been completed and applied.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH21

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