Enhanced toolbox for the combined analysis of fluid-And structure-borne noise of hydraulic systems

Citation
BATH/ASME 2016 Symposium on Fluid Power and Motion Control, FPMC: (2016-09)
Contribution to Conference
Symposium on Fluid Power and Motion Control, BATH/ASME, FPMC 2016  
Publisher DOI
10.1115/FPMC2016-1701
Scopus ID
2-s2.0-85002170785
Today's available software packages that feature dedicated hydraulic system noise analysis capabilities focus on the Fluid- Borne Noise (FBN) prediction in frequency or time domain. However, some noise sensitive hydraulic installation areas, like light weight structures in aviation, drive the development of an extended toolbox that also covers the prediction of Structure- Borne Noise (SBN) and Fluid-Structure-Interaction (FSI) in hydraulic systems. This conference contribution presents the concept and design of such a toolbox. It is implemented in a Matlab Simulink/ Simscape environment by FBN-, SBN-And FSImodel libraries. For a given study case a simulation model is generated using elements from these libraries. The simulation results are experimentally validated using a dedicated hydraulic system noise test rig. It features a rotary valve as FBN source and a pipe system equipped with dynamic pressure transducers for FBN detection and acceleration sensors for SBN detection. The analysis capabilities of such a toolbox are considered beneficial in particular for future (pre-/re-) design projects in the aviation environment, which hold challenging application constraints for efficient hydraulic system noise reduction devices: Besides obligatory strong limits on component weight and size, the high safety and reliability standards demand simple and maintenance-free onboard devices. Hence solutions with minimum hardware efforts are preferred. In this context, the proposed toolbox can be used for a combined tuning of type and location of standard/simple FBN silencers together with type and location of SBN effecting pipe clamps in order to optimize the overall system noise pattern towards an increased equipment durability and passenger comfort.
Subjects
Aircraft hydraulic system
Fluid-borne noise
Fluid-structure-interaction
Hydraulic silencer & pipe clamp tuning
Hydraulic system noise
Hydraulic system noise analysis tool
Impedance modeling
Structure-borne noise