A study on wheeze models  

作　　者：XU Jingping CHEN Qimin MIN Yijian ZANG Xiaofei and LU Bainian (Applied Acoustits Institute. Shaanxi Normal University. Xi’ an 710062) 

出　　处：《Chinese Journal of Acoustics》1994年第3期261-270,共10页声学学报（英文版）

摘　　要：In this paper, the finite differenee schemes for the linear and nonlinear models of wheezes are given. The waveform of wheczes is analysed. It is shown that the numerical results of the lincar model of wheezes and Grotberg's theorehcal results coincide well. The numerical results of the nonlincar model of wheczes are in qualita tive agreement with our expcrimental observations. It is suggested that the nonlinear elastance coefficient (β) causes damping, and is closely related to the flow limitation and the airway collapse. Wheezes result from the interachon between the fluid forces and the wall forces and the airway wall flutter is a forced-vibration, rather than a self vibration.In this paper, the finite differenee schemes for the linear and nonlinear models of wheezes are given. The waveform of wheczes is analysed. It is shown that the numerical results of the lincar model of wheezes and Grotberg's theorehcal results coincide well. The numerical results of the nonlincar model of wheczes are in qualita tive agreement with our expcrimental observations. It is suggested that the nonlinear elastance coefficient (β) causes damping, and is closely related to the flow limitation and the airway collapse. Wheezes result from the interachon between the fluid forces and the wall forces and the airway wall flutter is a forced-vibration, rather than a self vibration.

关 键 词：Wheeze models Nonlinear elastance coefficient 

分 类 号：O421[理学—声学]