| 摘要: |
| 焊接残余应力影响焊接结构可靠性.传统残余应力测量方法无法满足焊接结构服役状态下的应力测量,无法实现薄壁结构的应力测量.使用改进的超声波法焊接残余应力测量系统,对壁厚3.5 mm的薄壁高速列车车体残余应力实现了无损测量,测量过程实时无损快速.测量结果与有限元模拟和激光全息小孔法测量结果对比,超声波法测量结果可靠,且对试验结果进行了讨论分析.建立的超声波法应力无损测量系统为焊接结构服役状态在线可靠性评估奠定了基础。 |
| 关键词: 超声波法 薄壁结构残余应力 列车车体 无损快速 |
| DOI： |
| 分类号: |
| 基金项目:中俄政府间科技合作资助项目(2007DFR70070) |
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| Residual stress evaluation of high-speed train body structure by ultrasonic method and verification |
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LU Hao1, LIU Xuesong1, MENG Lichun2, MA Ziqi1, FANG Hongyuan1
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1.State Key Laboratory of Advanced Welding Production Technology, Harbin Institute of Technology, Harbin 15001, China;2.CSR Sifang Locomotive and Rolling Stock. Co. Lt, Qingdao 266000, Shandong, China
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| Abstract: |
| Residual stress is one of the most important challenges to the safety of parts and structures as welled.Ultrasonic stress measurement system is modified for the measurement of thin wall welded structure.The residual stress of high-speed train body structure is measured by the system.The measurement process is not only nondestructive, but also real-time and quick.The results of the ultrasonic method are verified by the laser hologram interference hole-drilling method and finite element method.The deviations of the results are also discussed. |
| Key words: ultrasonic thin wall welded structure residual stress high-speed train nondestructive |
