Analysis Of Wave Reflection Research Articles

A note on times to fracture in solid Perspex spheres due to point explosive loading

The internal fracturing of a Perspex sphere due to a localised explosive loading on its surface has been investigated both analytically and experimentally. The locations and times of occurrence of the fractures are predictable from an analysis of stress wave reflection from the free surface based on the methods of geometrical acoustics. High-speed photography was used to measure and note the order in time at which the different fractures occurred.

Closure to “Discussion of ‘Analysis of Pressure Wave Reflection in the Male Urethra for the Purpose of Diagnosing Obstructions’” (1975, ASME J. Fluids Eng., 97, p. 396)

Closure to “Discussion of ‘Analysis of Pressure Wave Reflection in the Male Urethra for the Purpose of Diagnosing Obstructions’” (1975, ASME J. Fluids Eng., 97, p. 396)

Analysis of Pressure Wave Reflection in the Male Urethra for the Purpose of Diagnosing Obstructions

This paper investigates the feasibility of diagnosing intraurethral obstructions in males by means of a pressure pulse technique. Initial discussion centers on some of the anatomical and physiological characteristics of the male lower urinary tract for both normal and abnormal (obstructed) conditions. Present methods of diagnosis are reviewed and the limitations of these techniques are discussed. An alternate method of diagnosis is then described which is based on examination of wave reflection behavior in the urethra during micturition after a pressure pulse is generated by means of quick-acting valve downstream of the meatus. Numerical results based on a proposed analytical model show that reflected waves from upstream obstructions can be detected, even for partial valve closure, and that induced peak pressures can be maintained within acceptable physiological limits. These results imply that the technique should be useful as a means of diagnosing obstructions in the male lower urinary tract.