Nonlinear progressive wave equation model for transient and steady-state sound beams

Gee Pinn, James Too, Jerry H. Ginsberg, George W. Woodruff

研究成果: Article同行評審

9 引文 斯高帕斯(Scopus)

摘要

NPE is a nonlinear progressive wave equation and associated computer code that yields a time domain solution for propagation in an acoustic waveguide. In the present study, the NPE equation is modified to describe axisymmetric sound beams in the paraxial approximation. The modified version of NPE is employed to describe three cases of radiation from a baffled piston: linear transient propagation, linear cw propagation, and nonlinear cw propagation. Alternative schemes to initialize the moving window that is convected by NPE are discussed for each type of problem. The linear transient signal or linear cw signal evaluated by NPE is compared to the direct prediction of the transient or steady-state Rayleigh integral. The nonlinear signal evaluated by NPE is compared to experimental data in the near and far field. The results show that NPE gives good results for all three propagation problems, in some cases at close regions where the paraxial approximation was previously believed to be inaccurate.

原文English
頁(從 - 到)59-68
頁數10
期刊Journal of the Acoustical Society of America
91
發行號1
DOIs
出版狀態Published - 1992 1月

All Science Journal Classification (ASJC) codes

  • 藝術與人文(雜項)
  • 聲學與超音波

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