摘要21世纪以来，大型浮式起重机应用在了许多场合。回转支承要承受较大的轴向载荷和倾覆力矩，所以回转支承的设计优化不容忽视。所以本文利用有限元法对回转支承进行分析,基于workbench对回转支承进行优化设计。84921

本文先由最简易的单排四点球式接触回转支承入手，对其分析计算。充分利用赫兹接触理论对回转支承滚动体与滚道接触部分进行量化分析，找出其不足之处。根据浮式起重机的真实运载情况考虑其各种载荷的变化，并且分析其各部分载荷分布的不均匀。根据不足寻找解决方案。

首先，根据浮式起重机的工作特点计算器工作载荷，对其轴向载荷及倾覆力矩进行分析，以便了解各滚子所受到的载荷，并且指出回转支承可能受到的载荷不平衡现象。

其次，利用赫兹接触理论和ANSYS workbench软件，建立回转支承有限元模型。对各部分所受应力，应变及其变形进行求解，得出所需参数。

然后，根据所得变形量及应力大小，基于workbench对原有模型进行优化设计。得出三种优化方案。

最后，将优化得出的计算结构与原模型的计算结果进行对比，选出一个结果最优的模型，实现更大的工程价值。

毕业论文关键词：浮式起重机；回转支承；workbench有限元分析；优化设计；赫兹理论

Abstract Since twenty-first Century, large floating cranes have been used in many applications。 The design optimization of the rotary support should not be ignored because of the large axial load and overturning moment。 So in this paper, the finite element method is used to analyze the rotary support, based on workbench to optimize the design of the rotary support。

Single row four penalty type from the aspects of the most simple contact slewing bearing with the analysis and calculation。 Make full use of the Hertz contact theory to quantify the contact part of the rolling element and the rolling track, and find out its deficiency。 According to the actual condition of the floating crane, the changes of various loads are considered, and the distribution of the load is not uniform。 Find solutions based on the problem。

First, according to the floating crane work characteristic calculator work load, on the axial load and overturning moment analysis, in order to understand the load on each roller by, and pointed out that the phenomenon of the imbalance of the load of slewing bearing may be subject to。

Secondly, using the Hertz contact theory and workbench ANSYS software, the finite element model of the rotary support is established。 The stress, strain and deformation of each part are solved, and the necessary parameters are obtained。

Then, according to the amount of deformation and the size of the stress, the original model was optimized based on workbench。 Three optimization schemes。

Finally, the optimization results are compared with the calculated results of the original model, and the optimal model is selected to achieve a larger value of the project。

Keywords: floating crane; slewing bearings; workbench finite element analysis; optimization design; Hertz theory

目录

第一章 绪论 1

1。1 本文的研究背景及意义 1

1。1。1 回转支承应用场合 1

1。1。2 本文研究意义 2

1。2 回转支承研究背景及意义 2

1。3本文研究内容 3

第二章 回转支承的受力分析及选型 5

2。1回转支承的结构类型