Abstract:Integral stiffened plate is often used in aerospace, ship and other structures. When the elastic guided wave method is used to detect the damage of such structures, it is necessary to understand the influence of the integral stiffeners on the elastic wave propagation behavior in plates. In this paper, the interaction between ultrasonic guided waves and T-stiffeners is studied by numerical simulation for typical T-stiffeners in aircraft structures. The variation characteristics of wave propagation caused by the presence of stiffeners are analyzed in time domain, frequency domain and wavenumber domain respectively. The results show that the existence of stiffeners causes obvious mode conversion in the structure. With the change of excitation frequency, the reflection and transmission behaviors of guided waves in A0 and S0 modes change obviously.
Key words: Stiffened plate; Ultrasonic guided waves; Non-reflective boundary; Structural health monitoring
孙佳颖,鱼则行,徐超. T型加强筋条对弹性导波在薄板中传播行为的影响[J]. 振动与冲击, 2022, 41(13): 67-74.
SUN Jiaying, YU Zexing, XU Chao. Effects of T-stiffener on propagation behavior of elastic guided wave in thin wall panels. JOURNAL OF VIBRATION AND SHOCK, 2022, 41(13): 67-74.
[1] Weiland J , Hesser D F , Xiong W , et al. Structural health monitoring of an adhesively bonded CFRP aircraft fuselage by ultrasonic Lamb Waves[J]. Proceedings of the Institution of Mechanical Engineers Part G Journal of Aerospace Engineering, 2020, 234(13):2000-2010.
[2] Demma A , Cawey P , Lowe M , et al. The reflection of guided waves from notches in pipes: a guide for interpreting corrosion measurements[J]. Ndt & E International, 2004, 37(3):167-180.
[3] Ricci F , Monaco E , Maio L , et al. Guided waves in a stiffened composite laminate with a delamination[J]. Structural Health Monitoring, 2016, 15(3):351-358.
[4] Ramadas C , Balasubramaniam K , Joshi M , et al. Interaction of Lamb mode (A0) with structural discontinuity and generation of "Turning modes'' in a T-joint[J]. Ultrasonics, 2010, 51(5):586-595.
[5] Haider M F , Bhuiyan M Y , Poddar B , et al. Analytical and experimental investigation of the interaction of Lamb waves in a stiffened aluminum plate with a horizontal crack at the root of the stiffener[J]. Journal of Sound and Vibration, 2018, 431:212-225.
[6] Reusser R S , Holland S D , Chimenti D E , et al. Reflection and transmission of guided ultrasonic plate waves by vertical stiffeners[J]. Journal of the Acoustical Society of America, 2014, 136(1):170-182.
[7] Bijudas C R , Mitra M , Mujumdar P M . Time reversed Lamb wave for damage detection in a stiffened aluminum plate[J]. Smart Materials & Structures, 2013, 22(10):105026.
[8] Schaal C , Mal A . Lamb wave propagation in a plate with step discontinuities[J]. Wave Motion, 2016, 66:177-189.
[9] 刘国强, 肖迎春, 张华,等. 复合材料加筋壁板损伤识别的概率成像方法[J]. 复合材料学报, 2018, 35(002):311-319.
LIU Guo-qiang, XIAO Ying-chun, ZHANG Hua, et al. Probability-based diagnostic imaging for damage identification of stiffened composite panel[J]. Acta Materiae Compositae Sinica, 2018, 35(002):311-319.
[10] 陶静雅, 袁慎芳. 基于频散补偿与路径-波速映射的损伤成像[J]. 仪器仪表学报, 2019, 40(04):207-215.
TAO Jing-ya, YUAN Shen-fang. Damage imaging method based on dispersion compensation and path-wave velocity mapping for complex composites[J]. Chinese Journal of Scientific Instrument, 2019, 40(04):207-215.
[11] 孙学伟, 李富才, 苗晓婷,等. 厚梁结构中的超声导波传播与损伤识别[J]. 机械工程学报, 2012, 48(014):1-10.
SUN Xue-wei, LI Fu-cai, MIAO Xiao-ting, et al. Research on propagation of guided waves in thick beam and crack damage identification[J]. Chinese Journal of Mechanical Engineering, 2012, 48(014):1-10.
[12] Mace B R , Manconi E. Modelling wave propagation in two-dimensional structures using finite element analysis[J]. Journal of Sound and Vibration, 2008, 318(4-5):884-902.
[13] Moser F , Jacobs L J , Qu J M. Modeling elastic wave propagation in waveguides with the finite element method[J]. Ndt & E International, 1999, 32(4):225-234.
[14] 吴 斌, 张也弛, 郑阳,等. 超声导波有限元仿真中吸收边界设置及参数[J]. 北京工业大学学报, 2013(12):1777-1783.
WU Bin, ZHANG Ye-chi, ZHENG Yang, et al. Modeling and parameters of absorbing boundary for ultrasonic guided wave in FE simulation[J]. Journal of Beijing University of Technology, 2013(12):1777-1783.
[15] 刘增华, 吴斌, 任捷,等. 基于频率-波数分析的激光Lamb波传播特性实验研究[J]. 振动与冲击, 2019, 38(22):70-78.
LIU Zeng-hua, WU Bin, REN Jie, et al. Expeimental study on the propagation characteristics of laser-induced Lamb waves based on frequency-wavenumber analysis[J]. Journal of vibration and shock, 2019, 38(22):70-78.
[16] Lu Y , Ye L , Su Z Q , et al. Quantitative assessment of through-thickness crack size based on Lamb wave scattering in aluminium plates[J]. Ndt & E International, 2008, 41(1):59-68.