摘要
塔式起重机裂纹识别主要解决是否存在裂纹和裂纹的位置。由于塔式起重机结构复杂,不可能对整机每个节点实现全方位检测,为此主要分2个步骤对其裂纹进行识别。利用有限元软件对塔式起重机进行静力学分析,找出其臂架结构的薄弱环节;在薄弱环节附近利用有限元分析和振动叠加原理得出塔式起重机裂纹分析数学模型,进行裂纹识别和数值仿真,并由此证实方法的有效性,为塔式起重机裂纹识别提供了可靠的依据。
The crack identification for the tower crane is mainly to identify the presence of any cracks and crack position.It＇s impossible to perform comprehensive testing for each node of the machine due to complex structure of the tower crane,so the paper introduces two steps to identify the cracks.The static analysis of tower cranes is performed by the finite element software,in order to find out any weak area of the boom structure;the mathematic model for crack analysis of tower cranes near the weak area is worked out through finite element analysis and vibration superposition principle,for the purpose of crack identification and numerical simulation,and hence of the verification of effectiveness of such method,providing reliable basis for crack identification of tower cranes.
出处
《起重运输机械》
2013年第3期10-14,共5页
Hoisting and Conveying Machinery
关键词
塔式起重机
臂架
裂纹识别
有限元
叠加
tower crane
boom
crack identification
finite element
superposition
