全地面起重机塔式副臂连接架铰点位置优化
发布时间：2018-08-28 09:40
【摘要】：塔式副臂连接架作为连接塔式副臂和主臂的纽带,受力情况比较复杂,其铰点的分布情况对塔式副臂的力向主臂传递影响较大,设计的好坏直接影响到主臂作用的发挥和整体的起重性能。目前国内所设计的塔式副臂连接架大都沿袭了国外现有的结构形式,对其具体的设计依据仍然没有一个清晰的认识。而且单独对塔式副臂连接架结构方面研究的文献很少,因此研究塔式副臂连接架的铰点位置对主臂的受力影响,进而确定塔式副臂连接架的结构型式,具有很重要的意义。 本文从力学角度出发,以TZM1200型全地面起重机为例对塔式副臂连接架结构进行研究,找出塔式副臂连接架尺寸与主臂受力之间的关系,进而对塔式副臂连接架结构进行优化。论文主要工作内容如下： (1)简化并建立了全地面起重机塔式副臂工况的力学模型,并用静力学原理对模型中的关键铰点进行受力分析,求出在模型简化的条件下连接架结构与主臂臂头的轴向力、切向力之间的关系,进而得出由连接架尺寸确定的主臂危险截面的弯矩和应力表达式。 (2)以塔式副臂连接架尺寸为设计变量、以主臂危险截面的应力最小为目标函数,并根据塔式副臂连接架实际结构特点,确定各设计变量的约束条件,最后得出优化数学模型的一般表达式。 (3)以TZM1200型全地面起重机为例,计算四种工况下主臂危险截面的应力,选取其中应力最大的工况作为优化工况,并利用MATLAB优化工具箱对其进行优化。将优化后的设计变量代入其他三种工况,分别得出优化前后主臂臂头的轴向力和切向力、主臂危险截面弯矩和应力的对比曲线。 优化结果表明,优化前后主臂受力情况得到了改善,为以后的塔式副臂连接架结构的设计提供了理论依据。
[Abstract]:As the link between the tower arm and the main arm, the stress of the tower arm is very complicated, and the distribution of the hinge point has a great influence on the transmission of the force to the main arm. The quality of the design directly affects the role of the main arm and the overall lifting performance. At present, most of the tower-type accessory-arm connecting frames designed in China follow the existing structure form of foreign countries, but there is still no clear understanding of its specific design basis. And there are few literatures on the structure of tower accessory arm connection frame, so it is very important to study the influence of hinge point position on the force of main arm, and then to determine the structure type of tower accessory arm connection frame. From the view of mechanics, this paper takes TZM1200 type all-ground crane as an example to study the structure of tower jib connecting frame, and finds out the relationship between the dimensions of tower side arm connection frame and the force on the main arm, and then optimizes the tower side arm connection frame structure. The main work of this paper is as follows: (1) the mechanical model of the tower jib working condition of all-ground crane is simplified and established, and the stress analysis of the key hinge point in the model is carried out by using the statics principle. The relationship between the connection frame structure and the axial and tangential forces of the main arm head under the condition of simplified model is obtained. Furthermore, the expressions of bending moment and stress of the dangerous section of the main arm determined by the dimensions of the connecting frame are obtained. (2) the dimensions of the tower type accessory arm are taken as the design variables, and the minimum stress of the dangerous section of the main arm is taken as the objective function. According to the actual structure characteristics of tower jib connecting frame, the constraint conditions of each design variable are determined. Finally, the general expression of optimization mathematical model is obtained. (3) taking TZM1200 type all-ground crane as an example, The stress of the dangerous section of the main arm is calculated under four working conditions. The most stress condition is selected as the optimal condition, and the optimization is carried out by using the MATLAB optimization toolbox. The optimized design variables are substituted into the other three working conditions, and the comparative curves of axial force and tangential force, bending moment and stress of the dangerous section of the main arm before and after the optimization are obtained respectively. The optimization results show that the stress of the main arm is improved before and after the optimization, which provides a theoretical basis for the design of the structure of the tower type accessory arm connecting frame in the future.
【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH213.3
[Abstract]:As the link between the tower arm and the main arm, the stress of the tower arm is very complicated, and the distribution of the hinge point has a great influence on the transmission of the force to the main arm. The quality of the design directly affects the role of the main arm and the overall lifting performance. At present, most of the tower-type accessory-arm connecting frames designed in China follow the existing structure form of foreign countries, but there is still no clear understanding of its specific design basis. And there are few literatures on the structure of tower accessory arm connection frame, so it is very important to study the influence of hinge point position on the force of main arm, and then to determine the structure type of tower accessory arm connection frame. From the view of mechanics, this paper takes TZM1200 type all-ground crane as an example to study the structure of tower jib connecting frame, and finds out the relationship between the dimensions of tower side arm connection frame and the force on the main arm, and then optimizes the tower side arm connection frame structure. The main work of this paper is as follows: (1) the mechanical model of the tower jib working condition of all-ground crane is simplified and established, and the stress analysis of the key hinge point in the model is carried out by using the statics principle. The relationship between the connection frame structure and the axial and tangential forces of the main arm head under the condition of simplified model is obtained. Furthermore, the expressions of bending moment and stress of the dangerous section of the main arm determined by the dimensions of the connecting frame are obtained. (2) the dimensions of the tower type accessory arm are taken as the design variables, and the minimum stress of the dangerous section of the main arm is taken as the objective function. According to the actual structure characteristics of tower jib connecting frame, the constraint conditions of each design variable are determined. Finally, the general expression of optimization mathematical model is obtained. (3) taking TZM1200 type all-ground crane as an example, The stress of the dangerous section of the main arm is calculated under four working conditions. The most stress condition is selected as the optimal condition, and the optimization is carried out by using the MATLAB optimization toolbox. The optimized design variables are substituted into the other three working conditions, and the comparative curves of axial force and tangential force, bending moment and stress of the dangerous section of the main arm before and after the optimization are obtained respectively. The optimization results show that the stress of the main arm is improved before and after the optimization, which provides a theoretical basis for the design of the structure of the tower type accessory arm connecting frame in the future.
【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH213.3
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9 李e，
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