高空作业平台上车的虚拟样机与结构分析

发布时间：2018-02-26 01:30

本文关键词： 高空作业平台上车虚拟样机臂架回转台　出处：《湖南大学》2011年硕士论文　论文类型：学位论文

【摘要】：高空作业平台广泛用于船舶、市政建设、消防、港口货运、建筑、物流等作业。高空作业平台是载人高空作业机器,用于运送工作人员和使用器材到指定高度进行作业的特种机器,其设计也较一般机器有更高的要求。因此,有必要对高空作业平台上车的受力及结构可靠性进行分析。本文以某新型25米直臂高空作业平台上车为研究对象,分析了其工况、建立其理论模型和虚拟样机,并进行了运动仿真分析,进而根据仿真结果对上车主要结构进行了强度和屈曲性能分析。论文具体内容有: (1)介绍了选题的背景和意义,阐述了国内外高空作业平台的发展现状和直臂式高空作业平台上车的研究现状。 (2)根据高空作业平台的作业范围,分析了上车的作业工况,建立了变幅机构、调平机构、臂架的运动数学模型,建立了高空作业平台上车的力学模型,并采用MATLAB软件计算出偏载荷时上车的理论受力。 (3)采用变幅油缸和调平油缸长度间的数学关系施加驱动约束,较好地实现了调平机构的调平功能,使得工作平台保持水平状态。建立上车的虚拟样机,分析出了该高空作业平台臂架在各工况下的受力,并与理论计算结果进行了比较分析。结果表明,高空作业平台上车的虚拟样机是可靠的。采用此虚拟样机,并考虑摩擦因素后,仿真出了考虑摩擦力后的各工况臂架受力。 (4)根据运动仿真结果,分析出了臂架和回转平台的恶劣工况;根据国际标准和澳大利亚标准,计算了臂架的风载荷和回转平面的惯性载荷;在ANSYS Workbench环境中,建立了臂架和回转平台的有限元模型,并分析了臂架和回转平台在恶劣工况时的强度、刚度和屈曲性能,而且根据分析结果对回转平台的结构作了改进,以满足澳大利亚标准要求。
[Abstract]:Aerial work platform is widely used in ship, municipal construction, fire fighting, port freight, construction, logistics and other operations. Special machines used to transport staff and use equipment to work at specified heights are also designed to be more demanding than general machines. It is necessary to analyze the force and structural reliability of the vehicle mounted on the aerial work platform. This paper takes a new type of aerial platform with a 25m straight arm as the research object, analyzes its working conditions, establishes its theoretical model and virtual prototype. Based on the simulation results, the strength and buckling performance of the main structures are analyzed. The main contents of this paper are as follows:. This paper introduces the background and significance of the topic, expounds the development status of aerial work platform at home and abroad and the research status of vertical arm aerial work platform. 2) according to the working range of the aerial work platform, this paper analyzes the working conditions of the boarding, establishes the mathematical model of the motion of the luffing mechanism, the leveling mechanism and the arm frame, and establishes the mechanical model of the vehicle mounted on the aerial work platform. MATLAB software is used to calculate the theoretical forces on the train under partial load. 3) the driving constraint is imposed by the mathematical relation between the variable amplitude oil cylinder and the leveling cylinder length, the leveling function of the leveling mechanism is well realized, and the working platform is kept in a horizontal state, and a virtual prototype on the train is set up. The force acting on the boom of the platform is analyzed and compared with the theoretical calculation results. The results show that the virtual prototype of the platform is reliable, and the virtual prototype is used. After considering the friction factors, the load of the boom under different working conditions is simulated. 4) according to the result of motion simulation, the bad working conditions of boom and rotary platform are analyzed, the wind load and inertial load of rotary plane are calculated according to international standard and Australian standard, and in the environment of ANSYS Workbench, the wind load and inertial load of rotary plane are calculated. The finite element model of boom and rotary platform is established, and the strength, stiffness and buckling performance of boom and rotary platform under bad working conditions are analyzed, and the structure of rotary platform is improved according to the analysis results. To meet Australian standards.
【学位授予单位】：湖南大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH211.6

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