【摘要】 研究了用pFFT快速边界元方法模拟声散射问题的关键技术。采用Burton-Miller方程消除了声学边界元方法中外问题解的不唯一现象。为此,文中研究了采用常量元时该方程中超奇异积分的计算方法。最后,通过对平面声波的刚性圆球声散射的数值模拟,验证了建立的声学pFFT快速边界元方法。更多还原

【Abstract】 The key techniques for simulating acoustic scattering by the pFFT boundary element method are studied.Burton-Miller formulation is employed to avoid the nonuniqueness problem appearing in the exterior acoustic problems.Hence,the calculation of hypersingular integrals in this equation is studied as constant elements are applied.A plane acoustic wave scattered by a rigid sphere is modelled to validate the developed pFFT boundary element method.更多还原