Nonlinearization and waves in bounded media: old wine in a new bottle

8th Workshop on Multi-Rate Processes and Hysteresis;HSFS Workshop (Hysteresis and Slow-Fast Systems)

Mortell, Michael P.^1 ; Seymour, Brian R.^2

Department of Applied Mathematics, University College, Cork, Ireland^1

Department of Mathematics, University of British Columbia, Vancouver, Canada^2

关键词: Concentric spheres;    Damped resonance;    Linear difference equations;    Nonlinear difference equations;    Nonlinear problems;    Nonlinearization;    Self-sustained oscillations;    Straight tubes;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/811/1/012006/pdf
DOI  :  10.1088/1742-6596/811/1/012006

来源: IOP

【 摘 要 】

We consider problems such as a standing wave in a closed straight tube, a self-sustained oscillation, damped resonance, evolution of resonance and resonance between concentric spheres. These nonlinear problems, and other similar ones, have been solved by a variety of techniques when it is seen that linear theory fails. The unifying approach given here is to initially set up the appropriate linear difference equation, where the difference is the linear travel time. When the linear travel time is replaced by a corrected nonlinear travel time, the nonlinear difference equation yields the required solution.