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[1]刘刚,张旭,闫朔,等.聚乙烯板壳结构早期性能退化的非线性导波评价方法[J].油气储运,2025,44(07):1-16.
　LIU Gang,ZHANG Xu,YAN Shuo,et al.Nonlinear guided wave evaluation method for detecting incipient performance degradation in polyethylene plate/shell structure[J].Oil & Gas Storage and Transportation,2025,44(07):1-16.

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聚乙烯板壳结构早期性能退化的非线性导波评价方法

《油气储运》[ISSN:1000-8241/CN:13-1093/TE] 卷: 44 期数: 2025年07期页码: 1-16 栏目: 出版日期: 2025-07-25

Title:: Nonlinear guided wave evaluation method for detecting incipient performance degradation in polyethylene plate/shell structure

作者:: 刘刚; 张旭; 闫朔; 张泽徽; 董雨轩; 马云修; 陈雷

Author(s):: LIU Gang; ZHANG Xu; YAN Shuo; ZHANG Zehui; DONG Yuxuan; MA Yunxiu; CHEN Lei

关键词:: 聚乙烯板壳结构; 早期性能退化; 老化损伤; 超声导波; 零频响应

Keywords:: polyethylene plate/shell structure; incipient performance degradation; aging damage; ultrasonic guided wave; zero-frequency response

文献标志码:: A

摘要:: 【目的】聚乙烯板壳结构早期损伤程度的定量表征对于保障油气设施的安全服役和预防维护至关重要。传统超声检测技术的可检缺陷精度受波长衍射极限的限制，对材料早期性能退化和结构微纳尺度缺陷并不敏感。而非线性导波评价方法易受复杂环境中的温度变化和结构应力干扰，会严重影响检测结果的可靠性和准确性。【方法】结合热致声弹性理论和超弹性本构方程，建立温度-应力耦合作用下板壳结构的频散分析模型，量化不同导波模态相速度对环境温度变化和结构应力的敏感性，为损伤检测中导波激励模态的优选提供指导。采用离散压电单元代替传统叉指换能器，提出一种基于时空调谐的压电阵列结构及导波激励模态控制方法，构建阵列激发特性的理论分析模型，并通过实验验证不同激发参数对导波激励声场的影响。搭建非线性超声导波检测系统，结合相位反转技术和低通滤波处理，提取损伤信号中的零频响应特征，引入非线性声学参数以定量表征聚乙烯试样的早期性能退化程度。【结果】S₀模态、SH₀模态和中高频范围（＞20 kHz-mm）的A₀模态对环境温度变化和结构应力都具有较弱的敏感性。采用自主研制的1-3型压电复合阵列探头能够在聚乙烯平板中实现单一导波模态的控制激励，从而大幅降低检测信号的分析难度。零频响应的时域形貌与激励信号的脉冲包络相似，其频域幅值在传播过程中可持续累积。此外，聚乙烯试样中非线性声学参数会随着老化时间的延长呈现上升趋势。【结论】非线性超声导波的零频响应对材料微观组织演化具有较高的检测灵敏度，可定量评估聚乙烯板壳结构的早期性能退化，为油气设施剩余寿命预测提供可靠的数据支撑。

Abstract:: [Objective] Quantitative characterization of the extent of incipient damage in polyethylene plate/shell structures is crucial for ensuring the safe operation and preventive maintenance of oil and gas facilities. However, traditional ultrasonic testing techniques are limited by the accuracy of detectable defects due to the wavelength diffraction limit, rendering them insensitive to incipient performance degradation and structural defects at the micro-nano scale. Additionally, the nonlinear guided wave evaluation method is sensitive to temperature variations and structural stress in complex environments, leading to significant impacts on the reliability and accuracy of the results. [Methods] By combining thermoacoustic elasticity theory with the hyperelastic constitutive equation, a dispersion analysis model for plate/shell structures under temperature-stress coupling was established. This model quantifies the sensitivity of phase velocities in various guided wave modes to changes in ambient temperature and structural stress, thereby providing guidance for optimizing guided wave excitation modes in damage detection. Instead of traditional interdigital transducers, discrete piezoelectric units were utilized to propose a piezoelectric array structure based on temporal-spatial tuning and a guided wave excitation mode control method. This led to the development of a theoretical analysis model to reveal the array’s excitation characteristics. Additionally, the influence of various excitation parameters on the guided wave excitation sound field was verified through experiments. A nonlinear ultrasonic guided wave detection system was also developed, incorporating phase reversal and low-pass filtering techniques to extract zero-frequency response characteristics in damage signals. The introduction of nonlinear acoustic parameters facilitates the quantitative characterization of the extent of incipient performance degradation in polyethylene samples. [Results] Modes S₀, SH₀, and A₀ in the medium and high-frequency range (>20 kHz) were identified as having weak sensitivity to changes in ambient temperature and structural stress. The independently developed 1-3 type piezoelectric composite array transducer demonstrated its capability for excitation control in a single guided wave mode in polyethylene plates, significantly reducing the difficulty of analyzing detection signals. The time-domain morphology of zero-frequency responses was found to be similar to the pulse envelope of the excitation signals, while the frequency-domain amplitude was observed to accumulate continuously during propagation. Additionally, the nonlinear acoustic parameters in polyethylene samples exhibited an upward trend with the extension of aging time. [Conclusion] The zero-frequency response of nonlinear ultrasonic guided waves demonstrates high sensitivity in detecting the microstructural evolution of materials. This approach enables a quantitative evaluation of incipient performance degradation in polyethylene plate/shell structures, providing reliable data to support predictions regarding the remaining lifespan of oil and gas facilities.

更新日期/Last Update: 2025-05-07