残余应力超声测量技术影响因素研究
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北京卫星制造厂有限公司,北京 100094

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TG115.28

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Effect Factors Study of Ultrasonic Measurement Technology of Residual Stress
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Beijing Spacecrafts,Beijing 100094

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    摘要:

    针对大型空间站寿命和质量进一步提高带来的残余应力精确测量问题,开展了影响残余应力测量准确性的因素和校正方法研究,在对温度、工件表面粗糙度、换能器耦合状态等原因分析的基础上,对主要影响因素引起的测量误差进行试验测定。试验结果表明:温度变化、工件表面粗糙度、换能器耦合状态等因素都可能引起较大的测量偏差,需引入温度补偿系数、表面粗糙度试块校正、优选耦合剂等修正与控制方法;有效控制影响因素,能够提高超声波检测残余应力的精准度,减小测量误差。该研究可为超声波残余应力测试技术在航天器舱体结构的应用发展提供技术参考。

    Abstract:

    Aiming at accurate measurements of residual stress caused by further improvement of service life and quality of large space station, factors of affecting measurement accuracy of residual stress and calibrating methods were studied. Based on theoretical analysis of temperature, surface roughness and transducer coupling state, measurement errors caused by main influencing factors were tested. Results show that temperature variation, surface roughness and transducer coupling state may cause large measurement deviation. In order to improve ultrasonic detection accuracy of residual stress and reduce measurement errors, modification methods such as compensating temperature, correcting surface roughness sample, optimizing coupling agent should be introduced. This study can provide a technical reference for application and development of spacecraft cabin structure ultrasonic residual stress measurement.

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徐丽霞,李伟煜,吕海清,刘战捷,李大海.残余应力超声测量技术影响因素研究[J].宇航材料工艺,2021,51(5):139-144.

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  • 收稿日期:2020-08-17
  • 最后修改日期:2021-10-16
  • 录用日期:2020-11-25
  • 在线发布日期: 2021-10-26
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