P91钢高温热损伤的非线性超声评价的有限元仿真

系统仿真学报 ›› 2015, Vol. 27 ›› Issue (9): 1967-1975.

• 仿真建模与仿真算法及数值仿真 • 上一篇下一篇

P91钢高温热损伤的非线性超声评价的有限元仿真

刘燕燕, 马世伟

上海大学机电工程与自动化学院上海市电站自动化技术重点实验室，上海 200072

收稿日期:2015-05-12 修回日期:2015-07-22 出版日期:2015-09-08 发布日期:2020-08-07

Modeling and Simulation of Nonlinear Ultrasonic Evaluation for Steel Damage by Finite Element Analysis

Liu Yanyan, Ma Shiwei

Shanghai Key Laboratory of Power Station Automation Technology, School of Mechatronics Engineering and Automation,Shanghai University, Shanghai 200072, China

Received:2015-05-12 Revised:2015-07-22 Online:2015-09-08 Published:2020-08-07
About author:Liu Yanyan (1981-), female, Hebei, Ph.D, lecturer. Research interested on ultrasonic devices and ultrasonic evaluation. Ma Shiwei (1965-), male, Gansu, Ph.D, Professor. Research interested on ultrasonic evaluation and digital signal processing.
Supported by:
National Science Foundation (61171145)；Shanghai Young Eastern Scholar (QD2015030)；

摘要/Abstract

摘要： 为满足评价承压钢材高温蠕变损伤的需求,建立了一种利用有限元来计算钢材高温热损伤的非线性超声效应的方法。非线性现象是由于材料的微结构变化导致的波形畸变,即高频谐波的产生,其随着传播距离的增大而累积。据此建立了P91钢经过高温蠕变的理论模型和非线性超声的二维理论模型,对P91钢进行高温热损伤的模拟仿真,对超声换能器和超声波在损伤钢材试样中的传播进行了有限元仿真,分析了在经过高温蠕变损伤后的钢材试样中声场的分布情况,对回波信号进行频谱分析发现明显的二次谐波分量,研究了热处理温度和非线性系数的关系。理论和实验结果都表明:随着热处理温度的升高,非线性系数逐渐增大,承压钢材的蠕变损伤程度加深,因此可将非线性效应作为有效评价材料高温蠕变损伤的特征参数。

关键词: 非线性超声, 高温蠕变损伤, 有限元仿真, P91钢

Abstract: A method was developed to theoretically determine the creep damage of steel by using the nonlinear ultrasonic technique. A two-dimensional finite element model was built to simulate the creep damage of the material and the ultrasonic wave propagation through the degraded material. The nonlinear phenomenon of wave distortion was due to the microstructural changes of the material, which caused distortion that accumulated with propagation distance. Based on the model, the nonlinear parameter of the second-harmonic wave increased with the increase of temperature, which gave some guidelines for the evaluation of the early stage of the degradation of mechanical properties and micro-damage of the materials. The measured nonlinearity of the P91 steel samples confirms the validity of the model.

Key words: nonlinear ultrasonic, creep damage, finite element method, steel P91

中图分类号:

TP391.9

刘燕燕, 马世伟. P91钢高温热损伤的非线性超声评价的有限元仿真[J]. 系统仿真学报, 2015, 27(9): 1967-1975.

Liu Yanyan, Ma Shiwei. Modeling and Simulation of Nonlinear Ultrasonic Evaluation for Steel Damage by Finite Element Analysis[J]. Journal of System Simulation, 2015, 27(9): 1967-1975.

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P91钢高温热损伤的非线性超声评价的有限元仿真

Modeling and Simulation of Nonlinear Ultrasonic Evaluation for Steel Damage by Finite Element Analysis

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