Vibration Fatigue Analysis of a Simply Supported Cracked Beam Subjected to a Typical Load

被引：6

作者：

Ma, Yijiang ^{[1
]}

Chen, Guoping ^{[2
]}

Wu, Jie ^{[1
]}

Ma, Kangjia ^{[3
]}

Fan, Le ^{[1
]}

机构：

[1] Jiangsu Univ Sci & Technol, Sch Naval Architecture & Ocean Engn, Zhenjiang 212003, Jiangsu, Peoples R China

[2] Nanjing Univ Aeronaut & Astronaut, State Key Lab Mech & Control Mech Struct, Nanjing 210016, Peoples R China

[3] Univ Elect Sci & Technol China, Coll Mech & Elect Engn, Zhongshan Inst, Zhongshan 528400, Peoples R China

来源：

APPLIED SCIENCES-BASEL | 2022年 / 12卷 / 15期

关键词：

crack; simply supported beam; vibration; fatigue life; PROPAGATION; GROWTH;

D O I：

10.3390/app12157398

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

In order to realize the accurate prediction of the vibration fatigue life of the beam in service, a loose coupling analysis method is proposed to carry out vibration fatigue analysis of a beam with an initial crack. In modal analysis, the initial crack segment is replaced with a torsion spring, and the damping loss factor is introduced by the complex modulus of elasticity; for the simply supported beam, the inherent vibration characteristic equation of the cracked beam is derived. In vibration fatigue analysis, the interaction between the crack's growth and vibration analysis is considered, and a loose coupling analysis method is proposed to conduct modal dynamic response and vibration fatigue analysis simultaneously. Results indicate that the crack's relative location and depth determine the modal of the cracked beam, and crack parameters, damping loss factor and external excitation frequency are important factors for the vibration fatigue life of the beam.

引用

页数：10

共 22 条

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