@Article{icces.2023.09605,
AUTHOR = {Menghui Liang, Changjun Zheng, Yongbin Zhang, Chuanxing Bi},
TITLE = {Design Sensitivity Analysis of Thin-Body Acoustic Problems Above an  Infinite Impedance Plane by Using a Fast Multipole Indirect BEM},
JOURNAL = {The International Conference on Computational \& Experimental Engineering and Sciences},
VOLUME = {27},
YEAR = {2023},
NUMBER = {1},
PAGES = {1--1},
URL = {http://www.techscience.com/icces/v27n1/54108},
ISSN = {1933-2815},
ABSTRACT = {This paper presents an accurate and efficient indirect boundary element method (IBEM) accelerated by the 
fast multipole algorithm (FMA)for the design sensitivity analysis of large-scale thin-body acoustic problems 
above an infinite impedance plane. The non-uniqueness issue of the IBEM in solving exterior acoustic 
problems is avoided by applying a hybrid combination of single- and double-layer potentials. The half-space 
impedance Green’s function which involves an image complex line source and is valid for both mass-like and 
spring-like impedance plane is employed to involve the sound-absorbing effect of the ground surface. 
Explicit evaluation formulations of the singular boundary integrals are derived and an integrator with 
adaptive interval subdivision is introduced to ensure the easy and stable application of the FMA. The 
efficiency and accuracy of the proposed method are verified through numerical examples, and its potential 
in the acoustic optimal design of thin-body structures is also shown in the numerical simulation.},
DOI = {10.32604/icces.2023.09605}
}