Numerical Method to Calculate Low-Frequency Sound Field in Non-anechoic Pools
A numerical method of low-frequency sound field calculation in non-anechoic pools with impedance boundary based on finite element software ACTRAN is proposed in this paper.A virtual Kundts tube is established in ACTRAN to obtain the normal incidence surface impedance of non-anechoic pools walls.The normal incidence surface impedance is then added to the surface of fluid domain to simulate the sound field boundary of non-anechoic pools.The numerical results are obtained by computing the model established in ACTRAN.The sound field of a spherical sound source has been tested in a glass tank to verify the accuracy of the proposed numerical method.As a comparison, the sound field in the glass tank with absolutely soft boundary is also calculated.It is concluded that the proposed method can effectively predict the low-frequency sound field in non-anechoic pools with arbitrary material impedance boundary and will provide a reference analysis method for the study of the low-frequency sound field characteristic in non-anechoic pools with complex impedance boundary.
Low frequency Non-anechoic pools Impedance boundary Numerical calculation
Rui TANG He TIAN Qi LI Yi-ming ZHANG
Acoustic Science and Technology Laboratory, Harbin Engineering University, Harbin 150001,China;Key Laboratory of Marine Information Acquisition and Security (Harbin Engineering University),Ministry of Industry and Information Technology;Harbin 150001, China
国际会议
上海
英文
305-309
2018-04-15（万方平台首次上网日期，不代表论文的发表时间）