高空作业车不同简化模型对比分析研究

发布时间：2018-04-02 08:49

本文选题：高空作业车　切入点：简化模型　出处：《大连理工大学》2012年硕士论文

【摘要】：高空作业车是一种重要的高空作业机械设备,按伸展结构可以分为伸缩臂式、折叠臂式、混合式和垂直升降式四种类型。随着城市化进程的加快,和建筑物高度的增加,大型高空作业车的伸展结构多采用混合式臂架。在结构上限制我国高空作业车行业发展的关键技术是大高度、复杂截面混合式臂架技术。复杂截面混合式臂架作为大高度高空作业车得主要部件,其刚度和强度、局部稳定性和整体稳定性是其静力学研究的重点,而臂架的刚度和强度是静力学研究的基础,故本文主要以臂架的刚度和强度为研究目的进行论述。本文以大连理工大学与郑州新大方重工科技有限公司合作开发的DJC101型高空作业车为研究对象,分析不同简化模型的优势,为实际应用提供参考。本文主要从以下几个方面进行论述： (1)分析DJC101型高空作业车混合式臂架的结构特点,说明高空作业车的分析目的,根据臂架结构的特点和不同分析目的,采用解析法和有限元法对臂架结构建立了三种简化模型：解析模型、梁单元模型和板壳单元模型； (2)对高空作业车臂架建立解析模型,通过对臂架的受力分析了臂架在变幅平面和旋转平面承受的载荷,利用放大系数法计算出臂架的刚度,得出了危险截面的强度,以DJC101型高空作业车为具体算例进行分析计算； (3)高空作业车臂架是薄臂细长型的箱型结构,根据这一特点在有限元分析软件ANSYS中利用自定义截面建立了梁单元模型,并运用APDL语言和MATLAB软件实现了臂架的参数化建模,建立可视化界面,以DJC101型高空作业车为具体算例对臂架进行线性和非线性分析。 (4)对高空作业车臂架结构进行必要的简化,利用有限元分析软件ANSYS建立板壳单元模型,对滑块搭接位置通过切割方式来建立实体滑块来模拟滑块的作用,以DJC101高空作业车为具体算例对臂架进行线性和非线性分析。 (5)根据DJC101高空作业车具体算例分析结果,以板壳单元模型非线性分析结果为基准,比较不同简化模型对臂架刚度强度及关键铰点位置的影响,得出相应的结论。
[Abstract]:Aerial work vehicle is a kind of important aerial work mechanical equipment, which can be divided into four types according to stretching structure: telescopic arm type, folding arm type, hybrid type and vertical lifting type. With the acceleration of urbanization, and the increase of building height, The extensional structure of large aerial work vehicle is mostly composed of hybrid jib. The key technology to restrict the development of China's aerial work vehicle industry is the large height. Complex cross section hybrid boom technology. As an important component of a high altitude aerial work vehicle, the stiffness and strength, local stability and overall stability of the complex cross section hybrid arm are the key points of its statics research. The stiffness and strength of the boom is the basis of static research, so this paper mainly discusses the stiffness and strength of the boom. In this paper, the DJC101 type aerial work vehicle developed by Dalian University of Technology and Zhengzhou New generous heavy Industry Technology Co., Ltd. is taken as the research object, and the advantages of different simplified models are analyzed. This paper mainly discusses the following aspects:. 1) analyzing the structural characteristics of the hybrid boom of the DJC101 type aerial work vehicle, and explaining the purpose of the analysis, according to the characteristics of the arm structure and the different purpose of the analysis. Three simplified models of boom structure are established by using analytical method and finite element method: analytical model, beam element model and plate shell element model; (2) an analytical model is established for the boom of a high altitude working vehicle. By analyzing the load on the boom in the plane of amplitude variation and the plane of rotation, the stiffness of the arm is calculated by using the magnification factor method, and the strength of the dangerous section is obtained. Taking DJC101 type aerial work vehicle as a concrete example to carry on the analysis and calculation; According to this characteristic, the beam element model is established in the finite element analysis software ANSYS, and the parametric modeling of the boom is realized by using APDL language and MATLAB software. The visual interface is established and the linear and nonlinear analysis of the boom is carried out with the example of DJC101 aerial work vehicle. In this paper, the structure of arm frame of aerial working vehicle is simplified. The finite element analysis software ANSYS is used to set up the plate and shell element model, and the solid slider is established by cutting to simulate the action of the slider. The linear and nonlinear analysis of the boom is carried out by taking the DJC101 aerial vehicle as an example. 5) based on the analysis results of DJC101 aerial work vehicle, the effects of different simplified models on stiffness strength and key hinge position of boom are compared based on the nonlinear analysis results of plate and shell element model, and the corresponding conclusions are drawn.
【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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