【作者】 方小军；

【导师】 王进；

【作者基本信息】 长安大学 ， 机械制造及其自动化， 2011， 硕士

【摘要】 高空作业平台安全、可靠、灵活的特点使其广泛应用于建筑、消防、物流等诸多领域。工作装置是高空作业平台重要组成部分,其动力特性直接影响到整机作业安全和性能。因此,本文在“十一五”国家科技计划支撑项目《高大空间建筑工程安装维护设备技术与产业化开发》(项目编号：2008BAJ09B06)的支持下,结合Pro/E、ADAMS、ANSYS等软件,采用刚-柔耦合的方法,建立了PT25型蜘蛛式高空作业平台虚拟样机,并且对其进行了系统的运动学和动力学仿真分析,主要内容如下：(1)确定工作装置主要技术参数,完成主要构件结构设计,并采用解析法对工作装置各液压缸作用力进行了详细计算和分析,结果表明工作装置技术参数选择合理,作用力匹配,性能优良。(2)应用Pro/E软件建立高空作业平台整机三维模型,将该模型导入ADAMS仿真环境,对其工作装置进行了多刚体运动学和动力学仿真分析,获得工作过程各构件运动学和动力学参数及其变化规律。(3)为分析主臂柔性对工作装置动态性能的影响,借助ANSYS软件建立主臂柔体模型,并将其导入ADAMS环境进行了刚—柔耦合动力学仿真计算,获得了在考虑主臂柔性时主臂位移、速度、加速度、应力等随时间的变化曲线,并分析了不同变幅速度对主臂应力的影响。(4)选择危险工况,采用ANSYS软件对主臂进行了静态有限元分析,将其应力分析结果与同位置刚—柔耦合模型分析结果进行了比较,二者结果接近,说明所建立的刚—柔耦合模型正确,分析方法可靠。充分利用多个软件各自的优势,建立了一套高效可行的高空作业平台工作装置虚拟样机仿真分析方法,其分析结果为设计方案的评价及改进提供了科学的依据。更多还原

【Abstract】 Due to the features of safety, reliability and mobility, aerial working platform is widely used in many fields such as construction, fire fighting, logistics and so on. Working device is a very important part of aerial working platform. Its dynamic characteristics influences the working safety and performances of whole equipment strongly. Therefore, based on rigid-flexible coupling, the virtual prototyping of spider-type aerial working platform PT25 is built in ADAMS platform. Then, the kinematic and dynamic characteristics of the platform are simulated and analyzed. The subject is funded by National Key Technology R&D Program During the 11th Five-year Plan Period,"the Technology and Industrialization of Installation and Maintenance Construction Equipment in Huge Space"(No.2008BAJ09B06). The main works are as following:(1) The main technical parameters of the working device are determined, and the main components are designed. The forces of hydraulic cylinders are analyzed and calculated in detail by use of analytical methods. The results show that all the parameters are reasonable, the forces are suitable, and the performances are excellent.(2) Based on Pro/E software, the 3D model of the whole aerial working platform is established. By introducing the model into ADAMS simulation environment, the multiple rigid body kinematic and dynamic simulations of the working device are fulfilled. The corresponding kinematic and dynamic parameters along with their variation are obtained.(3) To analyze the effect of the dynamic performance of the boom on the working device, a flexible model of the boom is established in ANSYS, and imported into ADAMS to get a rigid-flexible model of working device. The time histories of the parameters of displacements, velocities, accelerations and stresses are achieved by simulation analysis. The effects of different lifting speeds on the stresses of boom are analyzed.(4) Choosing the dangerous working conditions, the boom is analyzed by use of static finite element method. The stresses by finite element method are compared with that by rigid-flexible model at the same working condition. They are almost the same. It is indicated that the rigid-flexible coupling model is correct, and the methods used before are credible. Taking advantages of the superiorities of different software, a efficient and feasible method to simulate and analyze the working device of aerial working platform is put forward. The results by the method provide some evidence for evaluating and improving the design.更多还原