| 引用本文: | 孙继龙,王荣合.频域响应函数评估管道壁厚[J].哈尔滨工业大学学报,2016,48(8):73.DOI:10.11918/j.issn.0367-6234.2016.08.012 |
| SUN Jilong,WANG Ronghe.Evaluation of pipe wall thickness through frequency response function[J].Journal of Harbin Institute of Technology,2016,48(8):73.DOI:10.11918/j.issn.0367-6234.2016.08.012 |
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| 摘要: |
| 管道的腐蚀和阻塞直接影响管道壁厚变化，为此，推导频域响应函数评估管道壁厚变化.通过连续方程和动量方程推导系统场矩阵，提出基于频域响应函数管道壁厚评估模型.通过频域响应压力函数(h)和峰值数目(m)对管道壁厚变化位置和壁厚变化长度进行精确评估，并且通过实验对理论方程进行验证，定位误差小于4%.由于壁厚改变程度直接影响共振峰偏移，最终通过建立频域响应模型评估管道当前状态
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| 关键词: 频域响应函数 场矩阵 峰值数目 壁厚评估 共振峰偏移 |
| DOI：10.11918/j.issn.0367-6234.2016.08.012 |
| 分类号:TU991 |
| 文献标识码:A |
| 基金项目:国家自然科学基金(51578310);深圳市节能环保产业发展专项资金资助(JCYJ20150518162144944) |
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| Evaluation of pipe wall thickness through frequency response function |
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SUN Jilong1,2, WANG Ronghe2
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（1.School of Environment, Tsinghua University, Beijing 100084, China; 2.Division of Energy and Environment, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, Guangdong, China）
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| Abstract: |
| The corrosion and blockage in pipes has influenced on pipe wall thickness variation. This paper proposes frequency domain response function to evaluate the pipe wall thickness. System field matrix by continuous and momentum equations is derived, and the evaluation model of the pipe wall thickness is based on frequency response function. The position of pipe wall thickness change and length of wall thickness varying are evaluated by pressure response function in frequency domain (h) and the number of peak (m). The theoretical equation is verified by the field experiment, and estimation error is less than 4%. Meanwhile, the degree of wall thickness change directly affects the resonant peak shift, and frequency response model can be used to evaluate current pipeline status
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| Key words: frequency-domain response function matrix field peak number wall thickness assessment resonant peak shift |
