Аннотация:B-Sim is open-access MATLAB software with a graphical user interface (GUI) developed for modeling the nonlinear propagation of high-amplitude acoustic plane waves with shocks. It implements numerical solutions of the Burgers equation, accounting for the effects of nonlinearity and thermoviscous absorption. B-Sim enables a comparative analysis of four time-domain algorithms commonly used in nonlinear acoustics: a conservative scheme, a shock-capturing Godunov-type scheme, an algorithm based on the exact implicit solution of the lossless Burgers equation, and a scheme operating in intrinsic coordinates. The software allows for analysing nonlinear shock-wave propagation effects for several predefined initial waveforms as well as the efficiency, accuracy, limitations, and specific features of various time domain numerical approaches. The software can be used for educational purposes as a supplement to courses on nonlinear and computational acoustics, and can also serve as a research tool for evaluating computational efficiency of the included algorithms when solving more general problems of nonlinear acoustics.
