裂纹超声散射的有限元模拟
Finite Element Modeling of Ultrasonic Wave Scattering on Cracks
摘 要
建立了无限长板的具有吸收边界的二维平面应变有限元模型，在研究了脉冲超声波在无限长板中传播的基础上，对板中平行于表面的裂纹、与表面成45°的斜裂纹和四分之一圆周弧形裂纹三种情况的脉冲超声波散射进行了重点研究。通过对纵横波的分离和在全波场中对散射波的分离，清晰地显示了裂纹对脉冲超声波的散射和复杂的模式转换。模拟结果以波场快照和A扫描曲线形式给出。
裂纹
散射
有限元模拟
Ultrasonic testing
Cracks
Scattering
Finite element modeling
Abstract
A twodimensional plain strain finite element model of infinite plate is developed to investigate the ultrasonic wave propagation and scattering on three kinds of cracks: parallel to the surface, 450 oblique angle to the surface, and quartercircle. In order to show the scattering and complex modeconversion clearly, the total field is decomposed into longitudinal and transverse parts and the scattered field is obtained by subtracting incident wave from the total field. The results are presented in the form of snapshots and Ascan plots.
中图分类号 TG115.28 O242.21
所属栏目 科研成果与学术交流
基金项目
收稿日期 2006/1/24
修改稿日期
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备注李树榜(1972-)，男，讲师，硕士。
引用该论文: LI Shubang,LI Shuguang,LIU Xuefeng. Finite Element Modeling of Ultrasonic Wave Scattering on Cracks[J]. Nondestructive Testing, 2007, 29(1): 27～31
李树榜,李书光,刘学锋. 裂纹超声散射的有限元模拟[J]. 无损检测, 2007, 29(1): 27～31
被引情况:
【1】孙朝明,汤光平,李建文, "脉冲反射法检测粘接缺陷的有限元模拟",无损检测 36, 6-10(2014)
【2】李书光,孙继华,李树榜,倪云鹿,李洁, "孔洞对透射波频谱影响的有限元数值模拟",无损检测 31, 72-75(2009)
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参考文献
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【2】陈建忠，史耀武.超声检测过程的数值模拟[J].无损检测,2001,23(5):198-201.
【3】廖振鹏.近场波动的数值模拟[J].力学进展,1997,27(2):193-216.
【4】Bond L J. Numerical techniques and their use to study wave propagation and scattering a review[C]. Elastic Waves and Ultrasonic NDE. Amsterdam: NorthHolland,1990.
【5】Jaleel K M A, Kishore N N, Sundararajan V. Finiteelement simulation of elastic wave propagation in orthotropic composite materials[J]. Materials Evaluations,1993,51(7):830-838.
【6】Kishore N N, Sridhar I, Iyengr N G R. Finite element modeling of ultrasonic waves by isolated flaws[J]. NDT&E International,2000,33(5):297-305.
【7】罗斯 J L.固体中的超声波[M].何存富，吴斌，王秀彦，译.北京：科学出版社,2004.
【8】王勖成.有限单元法[M].北京：清华大学出版社,2003.
【9】Datta D, Kishore N N. Features of ultrasonic wave propagation to identify defects in composite materials modeled by finite element method[J]. NDT&E International,1996,29(4):213-223.
【10】Lysmer J, Kuhlemeyer R L. Finite dynamic model for infinite media[J]. J Eng Mech ASCE,1969,95(8):859-877.
【11】Sarma G S, Mallick K, Gadhinglajkar V R. Nonreflecting boundary condition in finiteelement formulation for elastic wave equation[J]. Society of Exploration Geophysicists,1998,63(3):1006-1015.
【12】沈建中.超声探伤灵敏度与灵敏度上限[J].无损检测,2002,24(10):418-421.
【13】杜功焕，朱哲民，龚秀芬.声学基础[M].南京：南京大学出版社,2001.
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