80t履带起重机臂架设计研究.doc

摘 要 履带起重机是工程起重机行业的一个重要门类，是现代工程建设施工中不可缺少的大型设备之一。臂架作为履带起重机的主要承载结构件，尤其是在大吨位履带起重机中，其设计和制造质量直接关系着起重机的整机安全性。长臂架刚度小，起臂工况下，二次变形易引起结构失稳而导致起臂失败，造成臂架损坏的严重后果，因此合理的对臂架结构进行设计是成功的对履带式起重机设计的关键。 履带起重机是用于起重作业的流动式起重机，可用于物料起重运输、设备及厂房安装等作业。履带起重机由于接地比压小，转弯半径小，爬坡能力大，能适应恶劣地面，具有起重能力大、臂长组合多、起重性能好、作业幅度大、吊重作业不需要打支腿、可吊载行驶等特点，使它具有其它类型起重机所无法比拟的优势。但由于其作用工况复杂，更需要合理的设计及仿真。本课题主要对80t履带起重机臂架进行合理的设计计算，并按照设计所得的尺寸对臂架建模，利用ansys软件对模型进行有限元分析，模态分析等。 关键词：履带式起重机，臂架系统，静态分析，模态分析 ABSTRACT Crawler crane is one of the necessary equipments and weightily type in project construction at hoist industry. As main bearing weight structure of the crawler crane, the design and manufacture quality for boom system are important to the safety of the whole machine, especially for the great tonnage cranes. The failure of the boom raised and damage to the boom result from the little rigidity of the long boom. The auxiliary bracing is a vital factor in the boom system. The deflection and the bearing weight condition can be improved obviously. Crawler crane is a mobile crane for lifting operation, lifting can be used to transport materials, equipment and installation of plant and other operations. Crawler crane has low grounding pressure, small turning radius and large climbing ability. It also can adapt to poor ground. Crawler crane has a large lifting capacity, kinds of combination for the length of the arm and large operating range.It also performs well in lifting. Just because of all this characters it has,crawler crane has the incomparable advantages which other types of cranes do not have.However, because it always works in the complicated situation, the reasonable design and simulation is necessary.This essay mainly talks about how to make a rational design for the boom of 80t crawlar crane and to creat the model of the boom with the designing size,then using ansys software to make finite element analysis and modal analysis for the model of the boom. Key words：Crawler Crane; Boom System;Static Analysis; Modal An