流域网格中嵌入式复杂声源的时域传播仿真
发布时间：2019-03-17 13:01
【摘要】：针对声学商业软件较难模拟任意形状、时变复杂声源的声辐射问题,使用有限体积法在时域内求解无声源项亥姆霍兹(Helmholtz)方程,将复杂声源嵌入到有限体积单元节点,推导了由给定声源表面声压或振动位移得到速度势公式,提高了声源处理的灵活性和计算效率。该方法允许对初始场问题及复杂时变声源声辐射进行仿真。对常见声源及二阶圆柱体声源声辐射进行了数值模拟,结果与解析解及商业软件结果进行了对比,误差均小于15%。程序具有良好的封装性及通用性,可以灵活地对不同声源进行组合,得出任意复杂声源时域的传播规律,为复杂声源声辐射等线性声学问题的研究提供了一个可靠的平台。
[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.
【作者单位】： 中南大学交通运输工程学院;
【基金】：国家自然科学基金资助项目50975289;51275531
【分类号】：O421.2
本文编号：2442323
[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.
【作者单位】： 中南大学交通运输工程学院;
【基金】：国家自然科学基金资助项目50975289;51275531
【分类号】：O421.2
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