Bonis M, Ribreau C
J Biomech Eng. 1981 Feb;103(1):27-31. doi: 10.1115/1.3138241.
The wave speed in initially elliptical collapsible tubes was studied. The celerity c of pressure waves of small amplitude was calculated from the numerically defined area-pressure law of the buckled cross section. In addition to the fact that the wave speed variation with transmural pressure was strongly dependent upon the initial eccentricity of the cross section, the wave speed value was found to be discontinuous at the contact pressure pc and reached a minimum on the right-hand side of the discontinuity. These results were compared with experimental data obtained in an annular duct.
研究了初始为椭圆形的可塌陷管中的波速。根据数值定义的屈曲横截面的面积-压力定律，计算了小振幅压力波的波速c。除了波速随跨壁压力的变化强烈依赖于横截面的初始偏心率这一事实外，还发现波速值在接触压力pc处是不连续的，并且在不连续点右侧达到最小值。将这些结果与在环形管道中获得的实验数据进行了比较。
