【摘要】：針對(duì)聲學(xué)商業(yè)軟件較難模擬任意形狀、時(shí)變復(fù)雜聲源的聲輻射問題,使用有限體積法在時(shí)域內(nèi)求解無聲源項(xiàng)亥姆霍茲(Helmholtz)方程,將復(fù)雜聲源嵌入到有限體積單元節(jié)點(diǎn),推導(dǎo)了由給定聲源表面聲壓或振動(dòng)位移得到速度勢(shì)公式,提高了聲源處理的靈活性和計(jì)算效率。該方法允許對(duì)初始場(chǎng)問題及復(fù)雜時(shí)變聲源聲輻射進(jìn)行仿真。對(duì)常見聲源及二階圓柱體聲源聲輻射進(jìn)行了數(shù)值模擬,結(jié)果與解析解及商業(yè)軟件結(jié)果進(jìn)行了對(duì)比,誤差均小于15%。程序具有良好的封裝性及通用性,可以靈活地對(duì)不同聲源進(jìn)行組合,得出任意復(fù)雜聲源時(shí)域的傳播規(guī)律,為復(fù)雜聲源聲輻射等線性聲學(xué)問題的研究提供了一個(gè)可靠的平臺(tái)。
[Abstract]:It is difficult for the acoustic commercial software to simulate the acoustic radiation of a time-varying and complex sound source. The Helmholtz (Helmholtz) equation of the silent source term is solved by the finite volume method in time domain, and the complex sound source is embedded into the nodes of the finite volume element. The velocity potential formula is derived from the sound pressure or vibration displacement on the surface of a given sound source, which improves the flexibility and calculation efficiency of the sound source processing. This method allows for simulation of initial field problems and acoustic radiation from complex time-varying sources. Numerical simulation of acoustic radiation from common sound sources and second-order cylindrical sources is carried out. The results are compared with analytical solutions and commercial software, and the error is less than 15%. The program has good encapsulation and generality, can flexibly combine different sound sources, and obtain the propagation law of arbitrary complex sound sources in time domain, which provides a reliable platform for the study of linear acoustic problems such as acoustic radiation from complex sound sources.
【作者單位】： 中南大學(xué)交通運(yùn)輸工程學(xué)院;
【基金】：國(guó)家自然科學(xué)基金資助項(xiàng)目50975289;51275531
【分類號(hào)】：O421.2

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本文編號(hào)：2442323