"A multi-degrees-of-freedom model for hydraulic pipeline systems"
, in Hubertus Murrenhoff: Proceedings of the 9th International Fluid Power Conference (9th IFK), 24th - 26th March 2014, Aachen, Germany, Vol. 1, Seite(n) 510-521, 3-2014, ISBN: 978-3-9816480-0-3
A multi-degrees-of-freedom model for hydraulic pipeline systems
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Proceedings of the 9th International Fluid Power Conference (9th IFK), 24th - 26th March 2014, Aachen, Germany
A multi-degrees-of-freedom approximation is set up for a pipeline network that connects a pump with two hydraulic cylinders. Pressure pulsations resulting from the pump's flow rate pulsations are simulated in all system nodes. An eigenvalue analysis reveals the natural frequencies and pressure mode shapes of the network. High pressure pulsation levels are explained by the fact that the network operates near a lightly damped resonance. By adding auxiliary pipelines at two pressure mode shape antinodes, the relevant natural frequency is lowered, resulting in an effective reduction of pressure pulsation. A comparison of transcendental and approximated transfer functions demonstrates both accuracy and restrictions of the method.