| 方忠恕,邢志礼,李金勇,李强,周盛华.基于激光超声的阀门焊接缺陷检测有限元仿真[J].有色金属材料与工程,2025,46(4):82-89. |
| 基于激光超声的阀门焊接缺陷检测有限元仿真 |
| Finite element simulation of valve welding defect detection dased on laser ultrasound |
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| DOI：10.13258/j.cnki.nmme.20241127001 |
| 中文关键词: 激光超声 有限元分析 COMSOL软件 阀门焊接缺陷 |
| 英文关键词:laser ultrasound finite element analysis COMSOL software valve welding defects |
| 基金项目:浙江省科学技术厅“尖兵领雁+X”研发攻关计划项目（2024C01228） |
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| 中文摘要: |
| 研究了激光超声吸收与阀门焊接缺陷的相互作用机制，基于COMSOL软件对脉冲激光激发超声波的物理过程进行了数值仿真，研究了激光激发超声波在阀门材料内部的传播特性与规律。通过建立有缺陷和无缺陷的阀门焊接模型，模拟了激光在阀门表面激发出的温度场、应力场和压力场，研究了3个物理场的变化规律，并对2个模型的回波信号进行对比验证。通过数值仿真提取回波中的缺陷特征信息，反演得到焊接缺陷的具体位置，结果显示，仿真所得缺陷位置、形态与模型预设参数高度吻合。该研究验证了激光超声技术用于阀门缺陷检测的可行性与准确性，证实激光激发的各模态超声波可作为工业场景下精准检测阀门焊接缺陷的有效手段。 |
| 英文摘要: |
| In this paper, the interaction mechanism between laser ultrasonic absorption and valve welding defects is studied, and the physical process of pulsed laser-excited ultrasonic waves is numerically simulated based on COMSOL software, and the propagation characteristics and laws of laser-excited ultrasonic waves in the valve material are systematically explored. By establishing two types of valve welding models, the temperature field, stress field and pressure field excited by the laser on the valve surface were simulated, the change law of the three physical fields was studied, and the echo signals of the two models were compared and verified, and the position of the welding defect was obtained by analyzing the echo defect information through numerical simulation, the specific position of the welding defect is inversely obtained. The results show that the defect position and shape obtained by simulation are highly consistent with the preset parameters of the model. This study verifies the feasibility and accuracy of laser ultrasonic technology for valve defect detection, and confirms that the ultrasonic waves of various modes excited by laser can be used as an effective method for accurately detecting valve welding defects in industrial scenarios. |
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