起重运输机械Issue(18)：21-28,8.
通用桥式起重机金属结构承载能力验证及仿真方法
摘要
Abstract
To investigate the load-bearing characteristics and safety performance of bridge-crane primary structures,a unified verification and simulation framework for the load-bearing capacity of metallic components is proposed.Grounded on the limit-state design philosophy,the load regimes acting on the bridge structure was classified first,and then the strength of the main girder was evaluated via analytical mechanical modelling.Critical-section stresses were subsequently solved through finite-element simulation employing sub-model technology.The material's ultimate tensile strength was determined as 213.6 MPa.Under the most unfavorable load combination,the theoretical peak stress at critical section No.5 was 161.5 MPa,confirming that all sectional stresses remain below the ultimate limit.Finite-element analysis of the fully loaded trolley positioned at mid-span yields a maximum stress of 154.2 MPa at the same critical section,corresponding to a relative deviation of 4.5%from the theoretical result.The close agreement corroborates the structural adequacy of the metal structure of bridge cranes and furnishes a robust theoretical basis and practical reference for future crane design.关键词
通用桥式起重机/金属结构/承载能力/有限元仿真/极限状态法/子模型Key words
universal bridge crane/metal structure/load-bearing capacity/finite element simulation/limit state method/sub-model分类
机械制造引用本文复制引用
左一凡..通用桥式起重机金属结构承载能力验证及仿真方法[J].起重运输机械,2025,(18):21-28,8.基金项目
辽宁省科技计划联合计划自然科学基金-面上项目(2024-MSLH-217) （2024-MSLH-217）
