CAJ | 학술논문

利用在边界突变点处设置两个速度值的方法，解决界面声散射数值模拟中的阻抗突变边界的积分奇异性问题。同时把界面对入射声音的响应局限在声散射方面，仅关心散射声场的声压方向性分布而不考虑吸声效果，可以通过边界元法得到较准确的界面散射极响应图。精确理论解和实验分析表明该处理方法在界面散射的预测中是有效的。
이용재변계돌변점처설치량개속도치적방법，해결계면성산사수치모의중적조항돌변변계적적분기이성문제。동시파계면대입사성음적향응국한재성산사방면，부관심산사성장적성압방향성분포이불고필흡성효과，가이통과변계원법득도교준학적계면산사겁향응도。정학이론해화실험분석표명해처리방법재계면산사적예측중시유효적。
Setting two velocities at a sudden change point to solve the integral singularity problem of the boundaries with sudden change impedances is very common in the numerical simulation of the sound scattering from discontinuous interfaces. If only considering the sound scattering distribution and ignoring absorption, an accurate polar response chart will be achieved by using boundary element method. Precise theoretical solution and experimental analysis show that this processing method is effective in the prediction of sound scattering from diffusers.