時(shí)間：2015年1月6日，上午10:00

地點(diǎn)：1號(hào)樓232會(huì)議室

報(bào)告題目：結(jié)構(gòu)健康監(jiān)測中超聲導(dǎo)波的高級(jí)模擬與仿真技術(shù)

Advanced Modeling Techniques for the Simulation of Ultrasonic Guided Waves in Structural Health Monitoring

 

個(gè)人簡介：申巖峰博士，現(xiàn)任美國密歇根大學(xué)航空航天系，Active Aeroelasticity and Structures Research Laboratory (A2SRL)實(shí)驗(yàn)室博士后研究員。2010 年至2014年，在南卡羅來納大學(xué)Laboratory for Active Materials and Smart Structures (LAMSS) 實(shí)驗(yàn)室工作，并獲得機(jī)械工程博士學(xué)位。多年從事結(jié)構(gòu)健康監(jiān)測，智能材料結(jié)構(gòu)，超聲導(dǎo)波主動(dòng)傳感，非線性超聲，以及超聲導(dǎo)波高級(jí)仿真技術(shù)等研究。發(fā)表學(xué)術(shù)論文20余篇，國際會(huì)議報(bào)告10余次。多次受到Smart Materials and Structures, Structural Health Monitoring, Wave Motion, Sensors, Journal of Civil Structural Health Monitoring, Construction and Building Materials等世界著名期刊邀請，承擔(dān)審稿工作。

　　本次報(bào)告將首先介紹結(jié)構(gòu)健康監(jiān)測的基本概念，包括導(dǎo)波，壓電片狀主動(dòng)傳感器，和主動(dòng)傳感方法。報(bào)告的主體部分闡述結(jié)構(gòu)健康檢測中超聲導(dǎo)波的高級(jí)模擬與仿真技術(shù)。其中涉及線性和非線性超聲的模擬。在線性超聲模擬技術(shù)中，三種有效仿真方法將被一一介紹：（1）蘭姆波的無反射邊界應(yīng)用；（2）解析解與有限元結(jié)合法；（3）利用CUDA技術(shù)實(shí)現(xiàn)超聲LISA模擬的并行計(jì)算。在非線性超聲模擬技術(shù)中，兩種模擬接觸非線性的有效方法將被介紹：（1）單元生死法；（2）接觸分析方法。

This report will first address the fundamental concepts of structural health monitoring (SHM), including guided waves, piezoelectric wafer active sensors (PWAS), and active sensing methods. The main body of the report presents advanced modeling techniques for the simulation of ultrasonic guided waves in SHM. The simulation of both linear and nonlinear ultrasonics will be discussed. In the linear ultrasonics part, three useful techniques will be introduced: (1) non-reflective boundary condition for Lamb waves; (2) combined analytical/FEM approach (CAFA); (3) GPU parallelized implementation of local interaction simulation approach (LISA) using compute unified design architecture (CUDA). In the nonlinear ultrasonics part, two methods were used to model the contact acoustic nonlinearity (CAN): (1) element activation/deactivation approach; (2) contact analysis. This report finishes with conclusions and suggestions for future work.