FDTD Simlation of Nonlinear Ultrasonic Pulse Propagation in ESWL Using Equations Including Lagrangian

نویسندگان
چکیده

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Evolution equations for pulse propagation in nonlinear media

We show that the complex modified KdV (cmKdV) equation and generalized nonlinear Schrödinger (GNLS) equation belong to the Ablowitz, Kaup, Newell and Segur or so-called AKNS hierarchy. Both equations do not follow from the action principle and are nonintegrable. By introducing some auxiliary fields we obtain the variational principle for them and study their canonical structures. We make use of...

متن کامل

Nonlinear propagation of light in structured media: Generalized unidirectional pulse propagation equations.

Unidirectional pulse propagation equations [UPPE, Phys. Rev. E 70, 036604 (2004)] have provided a theoretical underpinning for computer-aided investigations into dynamics of high-power ultrashort laser pulses and have been successfully utilized for almost a decade. Unfortunately, they are restricted to applications in bulk media or, with additional approximations, to simple waveguide geometries...

متن کامل

Nonlinear Ultrasonic Wave Propagation in Biological Materials

The n o n l i n e a r i t y p a r a m e t e r B / A h a s b e e n d e t e r m i n e d f o r t i s s u e mode l s ( a q u e o u s s o l u t i o n s o f b i o l o g i c a l m a c r o m o l e c u l e s ) a n d f o r e x c i s e d t i s s u e s f r o m measuremen t s o f t h e f u n d a m e n t a l p r e s s u r e a m p l i t u d e , a t t h e s o u r c e , and t h e s e c o n d ha rmon ic p r e s ...

متن کامل

Unique Solution of Short Pulse Propagation in Nonlinear Fiber Bragg Grating

In this study, a new numerical method is introduced to obtain the exact shape of output pulse in the chalcogenide fiber Bragg grating (FBG). A Gaussian pulse shape with 173 ps width is used as an input pulse for lunching to a 6.6 mm nonlinear FBG. Because of bistable and hysteresis nature of nonlinear FBG the time sequence of each portion of pulse is affected the shape of output pulse. So we di...

متن کامل

Modelling Optical Pulse Propagation in Nonlinear Media Using Wavelets

A wavelet based model for propagation of optical pulses in nonlinear media is presented. We obtain an O(N) algorithm for linear propagation by replacing the wavelet-domain propagation operator by its Taylor series approximation. Nonlinear propagation is then achieved by adding the nonlinear term in mid-step in a method analogous to the split-step Fourier method. Using wavelets ooers the advanta...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: IEEJ Transactions on Electronics, Information and Systems

سال: 2007

ISSN: 0385-4221,1348-8155

DOI: 10.1541/ieejeiss.127.1206