履带起重机桁架臂破坏性试验及理论分析  

Destructive test and theoretical analysis of crawler crane lattice boom

作　　者：孙岱华[1] SUN Daihua(Technical Quality DeparLment.Beting Special Equipment Testing Center,Beijing 100029,China)

机构地区：[1]北京市特种设备检测中心技术质量室,北京100029

出　　处：《中国工程机械学报》2021年第6期561-564,共4页Chinese Journal of Construction Machinery

基　　金：国家质量监督检验检疫总局科技计划项目资助(2017QK111)。

摘　　要：针对履带起重机起臂工况,选取其中9 m臂节进行破坏性试验,并通过理论分析破坏的原因。由此建立臂节的有限元模型,分析位移与应力的分布特点及稳定性,阐述受力机理。通过对比,理论分析的失稳结果与试验结果基本吻合,表明模型和分析的正确性。进一步分析了各腹杆失稳的因素,给出了理论分析与试验结果细微差异的原因。为后续臂架实际使用和检测工作提供了数据支持。For the case of luffing boom from horizontal status,9 m boom section is as a test object to perform destructive test. The destructive reason is analyzed through theoretical method. The finite element method(FEM)of boom section is built. The corresponding displacement and stress distribution are analyzed,and the mechanical principle is exposed. The stability result and test result are anastomotic,which verifies the validity of boom FEM. The instable facts of auxiliary members are further analyzed. The detail difference between theoretical results and test results is given. These provide data support for boom application and detection.

关 键 词：履带起重机 桁架臂 有限元 破坏性试验 

分 类 号：TH213.7[机械工程—机械制造及自动化]