全回转起重机长桁架起重臂的起重特性研究

发布时间：2018-02-02 17:36

本文关键词： 全回转起重机长桁架起重臂有限元结构分析瞬态分析模态分析　出处：《东北石油大学》2011年硕士论文　论文类型：学位论文

【摘要】：全回转起重机具有灵活、便捷、适应性广等优点,是船舶、港口和海上平台广泛使用的起重机械。随着近年来国际经济和基本建设的迅猛发展,全回转起重机应用越来越广,作用越来越大,同时对其要求也越来越高。这些都促使全回转起重机的技术性能进入了崭新的发展阶段。本论文以全回转起重机长桁架起重臂为研究对象,利用计算机辅助有限元分析软件ALGOR对其起重臂结构进行典型工况的有限元分析、静动态响应分析、关键节点疲劳分析;并提供结构强度、刚度和动态特性分析结果,为其优化设计提供必要的参考依据。具体内容为: 1.对全回转起重机长桁架起重臂,按照工况表提供的四种载荷工况施加载荷和约束等边界条件,采用有限元理论计算,提取出静态变形云图、应力分布云图和瞬态应力曲线,进行了详实的结构分析。 3.对全回转起重机长桁架起重臂关键节点处的主弦杆与腹杆连接进行疲劳计算,提取出节点破坏云图,进行疲劳分析。 2.为了提高作业可靠性,根据模态分析特点,对全回转起重机长桁架起重臂结构提取前10阶模态的固有频率和振型进行模态分析,并对结构影响较大振型进行详细分析和说明。
[Abstract]:With the advantages of flexibility, convenience and wide adaptability, full-rotary cranes are widely used by ships, ports and offshore platforms. With the rapid development of international economy and capital construction in recent years, full-slewing cranes have been used more and more widely. At the same time, the role of the crane is becoming more and more important, and the requirements for it are becoming higher and higher. All of these make the technical performance of the full-rotating crane enter a new stage of development. In this paper, the long truss lifting boom of the full-slewing crane is taken as the research object. The finite element analysis software ALGOR is used to analyze the typical working conditions of the cantilever structure, the static and dynamic response analysis, the fatigue analysis of the key nodes, and the analysis results of the structural strength, stiffness and dynamic characteristics are provided. To provide the necessary reference for its optimal design. 1. The static deformation cloud diagram, stress distribution cloud diagram and transient stress curve are extracted by finite element theory according to the boundary conditions such as load and constraint under four load conditions provided by the working condition table for the long truss lifting arm of a full rotary crane. Detailed structural analysis was carried out. 3. The fatigue calculation of the connection between the main chord and the web bar at the key node of the long truss hoist of the full rotary crane is carried out, the damage cloud diagram of the node is extracted and the fatigue analysis is carried out. 2. In order to improve the reliability of operation, according to the characteristics of modal analysis, the natural frequencies and modes of the first 10 modes of the long truss hoisting jib structure of a full-slewing crane are analyzed and explained in detail.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH21

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