局部狭窄幅度振荡弹性管内脉动流阻抗分析
作者：许世雄 邸娜 吕岚 计琳
单位：复旦大学力学与工程科学系 上海 200433
关键词：缓慢狭窄血管；狭窄幅度径向振荡；输入阻抗
医用生物力学000306摘 要：本文研究局部缓慢狭窄幅度径向振荡血管内血液脉动流的输入阻抗。犬股动脉计算结果表明不论哪一种参数变化，零阶谐频阻抗模(阻力)最大，然后下降，在二阶谐频处发生波动。狭窄振荡频率的变化，使各阶谐频输入阻抗模在一个心动周期内发生不同的变化。狭窄幅度的变化则对输入阻抗模影响较小。
ANALYSIS OF THE INPUT IMPEDANCE OF PULSATIVE FLOW THROUGH A VESSLE WITH MILD STENOSIS AMPLITUDE OSCILLAING RADIALLY
, http://www.100md.com
Xu Shixiong ,Dina ,Lu Lan ,Ji Lin
(Department of Mechanics ＆ Engineering Science, Fudan University, Shanghai 200433)
Abstract：in this paper, the input impedance of a pulsative flow through a vessel with mild stenosis amplitude radically was investigated. The calculate of arteria femoralis of dog showed no matter which kind of stenosis parameters change, the input impedance of the zero order harmonic frequency is the largest, and the others reduce successively. There is a fluctuation when it comes to the second order harmonic frequency, which accords with the physiology fact. The frequency of the stenosis amplitude oscillatory makes the input impedance periodically change in a cardiac cycle. But the Character of the wall of the tube has little effect on the input impedance.
, 百拇医药
Keywords：Vessel with mild stenosis, Stenosis amplitude oscillating radially, input impedance.
参考文献：
[1]Yong, D.F., Effect of a time-dependent stenosis on flow through a tube, J. Engnd. Ind., trans. ASME, 1968, 90: 248.
[2]Lee,J.S., Fung,?Y.C., Flow in a locally constrieted tube at low Reynolds numbers, J.Appl.Mech., 1983, 29: 9～16.
[3]Ramachandra Rao, Oscillatory fiow in an elastic tube of variable cross-section, Acta. Mech.,1983, 46: 155～165.
, http://www.100md.com
[4]Hall,P., Unsteady viscous flow in a pipe of slowly yarying cross-section, J.Fluid Mech., 1974, 64: 209～226.
[5]J.M.Reese and D.S.Thompson, Shear stress in arterial stenosis: a momentum integral model, J. Biomech,, 998, 31: 1051～1057.
[6]吕岚，许世雄，局部缓慢狭窄幅度径向振荡弹性直圆管内脉动流的压强和压强梯度分析，医用生物力学，1999，14: 143～151.
[7]许世雄，计琳，Y. T. Chew, H. T. Low, 吕岚，毛晓春，缓变狭窄幅度径向振荡血管内血流动力学，医用生物力学，1999, 14: 202～207.
[8]William R.Milnor, Hemodynamics, WILLIAMS＆WILKINS, Baltimore U.S.A,1982.
[9]O’Rourke M.F.P, Arterial Function in Health and Disease. Edinburgh, London, Melbourne and New York: Churchill livingstone, 1982., 百拇医药
单位：复旦大学力学与工程科学系 上海 200433
关键词：缓慢狭窄血管；狭窄幅度径向振荡；输入阻抗
医用生物力学000306摘 要：本文研究局部缓慢狭窄幅度径向振荡血管内血液脉动流的输入阻抗。犬股动脉计算结果表明不论哪一种参数变化，零阶谐频阻抗模(阻力)最大，然后下降，在二阶谐频处发生波动。狭窄振荡频率的变化，使各阶谐频输入阻抗模在一个心动周期内发生不同的变化。狭窄幅度的变化则对输入阻抗模影响较小。
ANALYSIS OF THE INPUT IMPEDANCE OF PULSATIVE FLOW THROUGH A VESSLE WITH MILD STENOSIS AMPLITUDE OSCILLAING RADIALLY
, http://www.100md.com
Xu Shixiong ,Dina ,Lu Lan ,Ji Lin
(Department of Mechanics ＆ Engineering Science, Fudan University, Shanghai 200433)
Abstract：in this paper, the input impedance of a pulsative flow through a vessel with mild stenosis amplitude radically was investigated. The calculate of arteria femoralis of dog showed no matter which kind of stenosis parameters change, the input impedance of the zero order harmonic frequency is the largest, and the others reduce successively. There is a fluctuation when it comes to the second order harmonic frequency, which accords with the physiology fact. The frequency of the stenosis amplitude oscillatory makes the input impedance periodically change in a cardiac cycle. But the Character of the wall of the tube has little effect on the input impedance.
, 百拇医药
Keywords：Vessel with mild stenosis, Stenosis amplitude oscillating radially, input impedance.
参考文献：
[1]Yong, D.F., Effect of a time-dependent stenosis on flow through a tube, J. Engnd. Ind., trans. ASME, 1968, 90: 248.
[2]Lee,J.S., Fung,?Y.C., Flow in a locally constrieted tube at low Reynolds numbers, J.Appl.Mech., 1983, 29: 9～16.
[3]Ramachandra Rao, Oscillatory fiow in an elastic tube of variable cross-section, Acta. Mech.,1983, 46: 155～165.
, http://www.100md.com
[4]Hall,P., Unsteady viscous flow in a pipe of slowly yarying cross-section, J.Fluid Mech., 1974, 64: 209～226.
[5]J.M.Reese and D.S.Thompson, Shear stress in arterial stenosis: a momentum integral model, J. Biomech,, 998, 31: 1051～1057.
[6]吕岚，许世雄，局部缓慢狭窄幅度径向振荡弹性直圆管内脉动流的压强和压强梯度分析，医用生物力学，1999，14: 143～151.
[7]许世雄，计琳，Y. T. Chew, H. T. Low, 吕岚，毛晓春，缓变狭窄幅度径向振荡血管内血流动力学，医用生物力学，1999, 14: 202～207.
[8]William R.Milnor, Hemodynamics, WILLIAMS＆WILKINS, Baltimore U.S.A,1982.
[9]O’Rourke M.F.P, Arterial Function in Health and Disease. Edinburgh, London, Melbourne and New York: Churchill livingstone, 1982., 百拇医药