全地面起重机塔式工况整体稳定性研究
发布时间：2019-04-02 16:30
【摘要】：随着工程建设发展的需要,全地面起重机塔式副臂工况在吊装行业得到了广泛应用,能够实现大起升高度和大起重载荷作业。塔式工况下,是由主副臂组合作业,规范中并未提供这种组合臂的稳定性计算方法,目前都是采用分别计算主臂和副臂的方法,显然未考虑组合臂整体稳定性的特点。同时,在吊装作业过程中,为了实现某一具体的吊载目标,主臂和副臂会有多种搭配组合方式,如何在考虑结构的稳定性的基础上对主臂和副臂进行较好的组合是一个亟待解决的现实问题。 针对上述问题,本文建立了全地面起重机塔式副臂工况有限元模型并进行分析。在对有限元参数化技术、稳定性理论以及MATLAB编程技术深入研究的基础上,本文开展了如下工作： (1)分析全地面起重机塔式副臂的组合方式及工作原理,研究ANSYS关于APDL和高级建模部分的有关理论,对模型进行简化,实现全地面起重机塔式副臂参数化建模； (2)研究有限元稳定性理论和有限单元法,对全地面起重机塔式副臂系统进行线性屈曲分析和非线性屈曲分析。基于上述方法,比较了全地面起重机塔式副臂系统分别采用整体式和分体式计算方法的区别以及临界载荷的变化规律,得出在进行全地面起重机塔式副臂工况整体稳定性时,采用非线性整体式的计算方法比较合理。 (3)针对同一目标吊载进行臂架组合的实际问题,分别以相同起升高度和相同变幅幅度为目标,变化主副臂的长度和角度,研究基于稳定性前提下的主副臂组合规律：主副臂的长度和主副臂的角度变化对组合臂架的稳定性有重要影响。所得结论可对工程吊装作业和工程设计提供一定参考。
[Abstract]:With the development of engineering construction, the working condition of tower-type auxiliary arm of all-ground crane has been widely used in hoisting industry, which can realize the operation of large lifting height and large lifting load. The stability calculation method of the combined arm is not provided in the specification. At present, the calculation method of the main arm and the auxiliary arm is adopted respectively. Obviously, the integral stability of the combined arm is not taken into account. At the same time, in the process of hoisting, in order to achieve a specific lifting target, the main arm and the auxiliary arm will have a variety of collocation and combination methods. How to combine the main arm and the auxiliary arm on the basis of considering the stability of the structure is a practical problem that needs to be solved urgently. In order to solve the above problems, the finite element model of the tower-type auxiliary arm of the all-ground crane is established and analyzed in this paper. Based on the in-depth study of finite element parameterization theory, stability theory and MATLAB programming technology, the following works are carried out in this paper: (1) the combination mode and working principle of tower-type auxiliary arms of all-ground crane are analyzed. The theory of ANSYS about APDL and advanced modeling is studied, and the model is simplified to realize the parameterized modeling of the tower-type auxiliary arm of all-ground crane. (2) the stability theory of finite element and finite element method are studied, and the linear buckling analysis and nonlinear buckling analysis of all-ground crane tower-type auxiliary arm system are carried out. Based on the above-mentioned methods, the difference between integral and split calculation methods and the variation rule of critical load in the whole ground crane tower-type auxiliary arm system are compared, and the overall stability of the whole working condition of the tower-type auxiliary arm of the all-ground crane is obtained. The nonlinear integral method is more reasonable. (3) aiming at the practical problem of arm combination with the same target load, the length and angle of the main and auxiliary arms are changed according to the same lifting height and the same amplitude of variation, respectively. This paper studies the combination rule of the main and auxiliary arms based on the stability: the length of the main and auxiliary arms and the angle of the main and auxiliary arms have an important influence on the stability of the combined arms. The conclusion can be used as a reference for lifting operation and engineering design.
【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】：TH21
本文编号：2452711
[Abstract]:With the development of engineering construction, the working condition of tower-type auxiliary arm of all-ground crane has been widely used in hoisting industry, which can realize the operation of large lifting height and large lifting load. The stability calculation method of the combined arm is not provided in the specification. At present, the calculation method of the main arm and the auxiliary arm is adopted respectively. Obviously, the integral stability of the combined arm is not taken into account. At the same time, in the process of hoisting, in order to achieve a specific lifting target, the main arm and the auxiliary arm will have a variety of collocation and combination methods. How to combine the main arm and the auxiliary arm on the basis of considering the stability of the structure is a practical problem that needs to be solved urgently. In order to solve the above problems, the finite element model of the tower-type auxiliary arm of the all-ground crane is established and analyzed in this paper. Based on the in-depth study of finite element parameterization theory, stability theory and MATLAB programming technology, the following works are carried out in this paper: (1) the combination mode and working principle of tower-type auxiliary arms of all-ground crane are analyzed. The theory of ANSYS about APDL and advanced modeling is studied, and the model is simplified to realize the parameterized modeling of the tower-type auxiliary arm of all-ground crane. (2) the stability theory of finite element and finite element method are studied, and the linear buckling analysis and nonlinear buckling analysis of all-ground crane tower-type auxiliary arm system are carried out. Based on the above-mentioned methods, the difference between integral and split calculation methods and the variation rule of critical load in the whole ground crane tower-type auxiliary arm system are compared, and the overall stability of the whole working condition of the tower-type auxiliary arm of the all-ground crane is obtained. The nonlinear integral method is more reasonable. (3) aiming at the practical problem of arm combination with the same target load, the length and angle of the main and auxiliary arms are changed according to the same lifting height and the same amplitude of variation, respectively. This paper studies the combination rule of the main and auxiliary arms based on the stability: the length of the main and auxiliary arms and the angle of the main and auxiliary arms have an important influence on the stability of the combined arms. The conclusion can be used as a reference for lifting operation and engineering design.
【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】：TH21
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