Frequency response analysis of the liquid-filled pipeline is an important way to obtain the dynamic behavior of piping systems subjected to internal/external excitations. This study applies Laplace transform to hyperb...Frequency response analysis of the liquid-filled pipeline is an important way to obtain the dynamic behavior of piping systems subjected to internal/external excitations. This study applies Laplace transform to hyperbolic partial differential equations which describes the axial motion taking into account Fluid Structure Interaction (FSI). An effective and convenient method to tackle frequency analysis and to pick up resonance frequencies of the system was developed, four wave modes in the frequency domain being used in combination of solution. The efficiency of this method is well proved with the examples.展开更多
The Information in frequency domain was deducted by a discrete Fourier transforms. The modal information of the fluid-structure interaction in internal flows was analyzed. The dispersive and dissipative term in a full...The Information in frequency domain was deducted by a discrete Fourier transforms. The modal information of the fluid-structure interaction in internal flows was analyzed. The dispersive and dissipative term in a fully coupled manner can be treated. The method has been validated by comparison with an exact analytical solution, with the results obtained by discrete Fourier transform and an analysis using the method of characteristics as well as with measured data from a laboratory apparatus.展开更多
文摘Frequency response analysis of the liquid-filled pipeline is an important way to obtain the dynamic behavior of piping systems subjected to internal/external excitations. This study applies Laplace transform to hyperbolic partial differential equations which describes the axial motion taking into account Fluid Structure Interaction (FSI). An effective and convenient method to tackle frequency analysis and to pick up resonance frequencies of the system was developed, four wave modes in the frequency domain being used in combination of solution. The efficiency of this method is well proved with the examples.
文摘The Information in frequency domain was deducted by a discrete Fourier transforms. The modal information of the fluid-structure interaction in internal flows was analyzed. The dispersive and dissipative term in a fully coupled manner can be treated. The method has been validated by comparison with an exact analytical solution, with the results obtained by discrete Fourier transform and an analysis using the method of characteristics as well as with measured data from a laboratory apparatus.
