关键词: 振动与波, 体积弹性模量, 压力波波速, 液压介质, 非插入

Abstract: The factors which influence the wave velocity in hydraulic media are analyzed and computed. It is presented that in the high pressure system and oilgas doublephased state the previous assumptions for compressive wave velocity formula in hydraulic media are not true any more. Thus, a new estimation method is necessary. In this paper, a new nonintrusive measurement method is proposed. In this method, the pressure gauges are installed at two different positions on the pipeline to measure the time difference when the compressive wave reaches. Therefore, the wave velocity can be determined. The randomness of elastic modulus under the condition of oilgas doublephased flow is studied in highpressure fluid system. The results provide references for simulation, design and management of hydraulic systems.

Key words: vibration and wave, elastic modulus, velocity of compressive wave, hydraulic media, nonintrusive