基于ABAQUS-FRANC3D联合仿真的吊车桁架疲劳危险位置裂纹扩展研究

赵贺; 李宇翔; 王跃强; 董超; 国忠岩; 张文元

doi:10.3724/j.gyjzG24041012

基于ABAQUS-FRANC3D联合仿真的吊车桁架疲劳危险位置裂纹扩展研究

doi: 10.3724/j.gyjzG24041012

赵贺¹,
李宇翔^2,3,
王跃强^2,3,
董超¹,
国忠岩¹,
张文元^2,3, ,

1. 中冶京诚工程技术有限公司, 北京 100176;
2. 哈尔滨工业大学, 结构工程灾变与控制教育部重点实验室, 哈尔滨 150090;
3. 哈尔滨工业大学, 土木工程智能防灾减灾工业和信息化部重点实验室, 哈尔滨 150090

基金项目:

国家自然科学基金面上项目（51978206）。

详细信息

作者简介:
赵贺，硕士，正高级工程师，主要从事钢结构设计与研究工作。

通讯作者:
张文元，hitzwy@163.com。

计量
- 文章访问数: 23
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- 被引次数: 0
出版历程
- 收稿日期: 2024-04-10
- 网络出版日期: 2026-07-06

Research on Crack Propagation at Fatigue-Critical Locations of Crane Trusses Using ABAQUS-FRANC3D Co-Simulation

1. Capital Engineering & Research Incorporation Limited, Beijing 100176, China;
2. Key Lab of Structural Dynamic Behavior and Control, Ministry of Education, Harbin Institute of Technology, Harbin 150090, China;
3. Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters, Ministry of Industry and Information Technology, Harbin Institute of Technology, Harbin 150090, China

摘要

摘要: 对吊车桁架疲劳危险位置在反复荷载作用下的疲劳裂纹扩展情况展开研究，建立了桁架ABAQUS实体单元模型，联合FRANC3D裂纹分析软件对桁架的多个疲劳危险位置进行分析，对裂纹缺陷几何尺寸、裂纹扩展区域、模型网格尺寸、Paris定律系数等一系列关键参数进行了确定，并对4个疲劳危险位置分别展开疲劳裂纹扩展模拟与疲劳寿命预测，分析了裂纹最终形态形成的原因。通过参数分析，探究了裂纹几何尺寸、裂纹形状及初始裂纹角对疲劳寿命的影响。结果表明，随着初始裂纹尺寸的增加，疲劳寿命降低。对于薄板构件，裂纹形状主要为半椭圆形或长直形，两类裂纹形状的差异不会对疲劳寿命产生明显影响；当裂纹角θ<-20°时，疲劳寿命随裂纹角的增大而急剧增加。
- 吊车桁架 /
- 数值模拟 /
- 应力强度因子 /
- 疲劳裂纹扩展 /
- 疲劳寿命
Abstract: This study investigates fatigue crack propagation at critical locations of a crane truss under repeated loading. A solid element model of the truss was developed in ABAQUS， and multiple fatigue-critical locations were analyzed in conjunction with FRANC3D crack analysis software. Key parameters， including the geometric dimensions of crack defects， crack propagation area， model mesh size， and Paris' law coefficients， were determined. Fatigue crack propagation simulations and fatigue life predictions were conducted for four critical locations， with analysis of the factors leading to the final crack morphology. Parametric analysis was carried out to examine the influence of crack geometry， crack shape， and initial crack angle on fatigue life.The results showed that as the initial crack size increased， the fatigue life decreased. For thin plate components， the crack shapes were mainly semi-elliptical or long straight. The difference between the two types of crack shapes would not have a significant impact on fatigue life. When the crack angle θ was less than -20°， the fatigue life increased sharply with the increase of the crack angle.
- crane truss /
- numerical simulation /
- stress intensity factor /
- fatigue crack propagation /
- fatigue life

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