多功能高空作业平台设计及关键机构动态特性分析

发布时间：2018-01-06 22:10

本文关键词：多功能高空作业平台设计及关键机构动态特性分析　出处：《江苏科技大学》2012年硕士论文　论文类型：学位论文

【摘要】：高空作业平台是高空维修的主要设备之一，能将工作人员和相关设备运送到指定高度进行作业，具有操作简单、安全可靠等功能，广泛应用于城市电力、建筑等领域。由于变电站现场维修环境的特殊性，现有的设备并不能完全满足现场维修的需要，急需一种新型设备来克服现有设备的缺陷。本文针对以上问题，以检修变电站某种类型的互感器为对象，对现有的高空作业平台进行深入的研究，研制一种集高空作业平台和起重机于一体的多功能高空作业平台，在分析整体方案的基础上，针对起重机的受力特点，建立了承载多种载荷工况的几何模型，进行了有限元分析和优化，并对关键机构进行动态特性的研究，为新产品的开发提供了一定的指导。论文主要研究了以下内容： (1)针对变电站工作现场的特点，提出了多功能高空作业平台的设计参数，在分析多种方案的基础上，选出了一种最佳方案——多节伸缩臂滑动式升降机构，体积小、轻巧方便，同时具有高空检修、吊装、梯子和重物搬运等功能，然后对起吊机构、变幅机构、旋转机构和伸缩臂机构进行详细的结构设计，从而确定了整体结构模型。 (2)应用Hypermesh软件对整机的三维模型进行网格划分，在此基础上运用ABAQUS软件进行有限元分析，得到了两种工况下各构件的应力和位移分布规律，，并根据分析结果对应力集中处进行结构改进。 (3)根据改进后的分析结果，各处应力集中都相应的减小，但伸缩臂受力仍不均匀，应用OPTISTRUCT软件进行离散尺寸优化，使整机的重量和体积都相应减小，各构件受力均匀，获得了较为理想的结构。 (4)运用动力学仿真软件ADAMS对多功能高空作业平台进行了动态分析，生成一系列执行机构的动力学特性曲线，为设备的工作性能提供参照依据。同时为了防止丝杆在作业过程中发生共振，对丝杆进行模态分析，得出其固有频率和振型，进一步确定整机的安全可靠性。
[Abstract]:The high altitude operation platform is one of the main equipment for high altitude maintenance . It can carry the staff and related equipment to the designated height for operation , and has the functions of simple operation , safety and reliability , and is widely used in the fields of city power and building . In view of the particularity of the field maintenance environment of the transformer substation , the existing equipment does not meet the requirement of the existing equipment . The main contents of this thesis are as follows : ( 1 ) According to the characteristics of the substation working site , the design parameters of the multi - function high - altitude operation platform are put forward . Based on the analysis of various schemes , a best scheme _ multi - section telescopic arm sliding type lifting mechanism is selected , which is small in size , light and convenient , and has the functions of high - altitude overhaul , hoisting , ladder and heavy load handling , and then detailed structural design of the lifting mechanism , the amplitude - changing mechanism , the rotating mechanism and the telescopic arm mechanism is carried out , so that the overall structural model is determined . ( 2 ) The three - dimensional model of the whole machine is divided by Hypermesh software . Based on this , the stress and displacement distribution law of each component under two working conditions is obtained , and the structure improvement is carried out on the stress concentration according to the result of the analysis . and ( 3 ) according to the improved analysis result , the stress concentration in each part is correspondingly reduced , but the stress of the telescopic arm is still not uniform , the discrete size optimization is carried out by using the OPTISTRUCT software , the weight and the volume of the whole machine are correspondingly reduced , the force of each component is uniform , and the ideal structure is obtained . ( 4 ) The dynamic simulation software ADAMS is applied to dynamic analysis of the multi - function high - altitude operation platform , and the dynamic characteristic curve of a series of executing mechanisms is generated , which provides a reference for the working performance of the equipment . Meanwhile , in order to prevent resonance of the screw rod during operation , the wire rod is subjected to modal analysis to obtain its natural frequency and mode shape , and the safety reliability of the whole machine is further determined .

【学位授予单位】：江苏科技大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH211.6

【引证文献】