摘要
本文提出一种描述含气泡水的非线性声场的物理模型。在声波驱动下，气泡壁作受迫振动，遵循Ｒａｙｌｅｉｇｈ－Ｐｌｅｓｓｅｔ方程，当共振时振幅很大，产生强烈的非线性振动。这非线性力学振动成为二次谐波声压的源，从而声场表现为强非线性。理论计算与ＷＵ和Ｚｈｕ的实验结果进行了比较，诸如强二次谐波声压等重要声学特性符合得比较满意。
A physical model which describes the nonlinear acoustic property of bubbly liquids is presented.The pulsating bubbles driven by sound waves oscillate violently at resonance and become the source of sacond harmonic sound pressure. So that strong acoustic nonlinearity in the bubbly liquids appears.Comparisions with Wu et.al.'s experiments show that the theory explains the experiments quite well
出处
《声学学报》
EI
CSCD
北大核心
1995年第6期425-431,共7页
Acta Acustica
基金
国家自然科学基金
关键词
声场
气泡水
非线性
声学特性
Bubbles (in fluids)
Nonlinear equations
Underwater acoustics
