履带起重机组合臂架整体稳定性研究

发布时间：2018-01-02 20:37

本文关键词：履带起重机组合臂架整体稳定性研究　出处：《大连理工大学》2012年硕士论文　论文类型：学位论文

【摘要】：随着对履带起重机设计的要求越来越精细,高耸且轻柔型臂架的大量采用,使得臂架的稳定性问题日益突出。尤其是对于组合臂架的稳定性问题,现在仍然是国内各大工程机械生产厂商及高校的难题。随着计算力学的迅速发展,有限元软件逐渐地被运用到工程设计中,其中ANSYS是比较典型的一种,但现在对于履带起重机组合臂架在ANSYS进行稳定性分析建模时,往往非常繁琐,而且在ANSYS中进行臂架等效的时候,没有考虑臂架扭转的效应。本文在研究履带起重机组合臂架的力学特性的基础上,系统地研究了组合臂架在ANSYS中的简化问题、薄壁构件的截面刚度等效问题、ANSYS的线性和非线性屈曲分析、ANSYS的APDL语言以及MATLAB GUI界面设计技术等,论文的主要研究工作和成果如下： (1)了解目前组合臂架在ANSYS建模和进行稳定性计算的问题,提出了履带起重机组合臂架有限元模型简化的新方法,并验证了该方法的可行性及合理性。 (2)研究了有限单元法的基本原理和线性屈曲分析和非线性屈曲分析的原理。 (3)根据截面刚度等效的理论和薄壁构件的力学特性,确定了在ANSYS中的简化单元,对臂架进行截面刚度等效,与之前的复杂模型进行对比,确定了简化方式的合理性。 (4)在ANSYS中对组合臂架的简化模型进行线性屈曲分析和非线性屈曲分析,得出组合臂架稳定性影响因素的变化规律。 (5)编写了履带起重机组合臂架稳定性计算程序,该程序充分利用了ANSYS的APDL语言及MATLAB GUI界面设计技术,用户可以利用该程序对臂架稳定性问题进行分析。
[Abstract]:With the design of the crawler crane is required more and more fine, tall and gentle type uses a lot of the boom, the stability of boom has become increasingly prominent. Especially for the stability problem of the arm, it is still a problem for the domestic engineering machinery manufacturers and universities. With the rapid development of Computational Mechanics, finite element the software has been applied to the engineering design, in which ANSYS is a typical, but now for the crawler crane boom in ANSYS stability analysis modeling, often very cumbersome, and boom equivalent in ANSYS, without considering the effect of arm twisting. Based on the study on the mechanical properties of crawler crane jib on the systematic study of the boom in ANSYS to simplify the problem, the thin-walled structural stiffness equivalent, linear and nonlinear ANSYS Buckling analysis, APDL language of ANSYS and MATLAB GUI interface design technology. The main research work and achievements of this paper are as follows:
(1) to understand the problem of ANSYS modeling and stability calculation of combined jib at present, a new method of finite element model simplification of crawler crane combined boom is put forward, and the feasibility and rationality of the method is verified.
(2) the basic principle of the finite element method and the principle of linear buckling analysis and nonlinear buckling analysis are studied.
(3) according to the theory of equivalent section stiffness and the mechanical characteristics of thin-walled components, a simplified element in ANSYS is determined. The stiffness of the boom is equivalent to that of the previous complex model, and the rationality of the simplified method is determined.
(4) in ANSYS, the linear buckling analysis and nonlinear buckling analysis are carried out for the simplified model of the combined arm frame, and the variation of the influence factors of the stability of the combined arm frame is obtained.
(5) compiling the stability calculation program of crawler cranes combined boom. This program makes full use of ANSYS's APDL language and MATLAB GUI interface design technology. Users can use this program to analyze the stability of boom.

【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】：TH213.7

【引证文献】