Research on Design Methods of Auxiliary Devices on Acoustical Impedance Measuring of Flexible Pipeline Elements

The equations of the acoustical impedance measuring of flexible pipeline components were derived from one-dimensional wave propagation theory.Numerically simulation to typical example was inves-tigated.The effects of kinds of factors on volume oscillating velocity falling of heads of inlet and outlet of a rubber hose were analyzed.The results show that the volume velocity of outler can be regarded as zero under a certain condition,in this way the simplified equations of data processing on the acoustical impedance can be achieved.These methods can be used to take optimizing design on auxiliary devices on the acoustical impedance measuring.