闭管中大振幅驻波理论  

Nonlinear standing waves in a tube

作　　者：马大猷[1] 

机构地区：[1]中国科学院声学研究所

出　　处：《声学学报》1994年第3期161-166,共6页Acta Acustica

摘　　要：大振幅驻波理论现扩展至计入闭管中附面层损耗时的情况．如前，以质点位移表达非线性波相速应计入质点速度的规律．符合驻波中各参量只在原地随时间作交流变化的现象．所得解完全满足流体动力学方程．把声场参量分解为频率分量时所遇到特殊情况做了讨论和处理．也提出一些新现象．Theory of nonlinear standing waves in a tube is presented,Including the effect ofBoundary Layer absorption. As in the previous paper[1],the particle displacement is used toaccount for the particle velocity as a part of the phase velocity of the nonlinear wave. Complex wave number is used to account for the dissipation. The solution satisfy exactly the hydrodynamic equations in the media. The unusual situations encountered in developing thefield parameters into their frequency components are discussed and solutions proposed to ratify the coefficients. New phenomena found in the result are in agreement with the experiments

关 键 词：大振幅驻波 驻波 损耗 

分 类 号：O422.7[理学—声学]