Abstract
Passive fluid mounts are used in the fixed wing applications as engine mounts. The passive fluid mount is placed in between the engine and the fuselage to reduce the cabin's structure- borne noise and vibration generated by the engine.To investigate the benefits of passive fluid mounts used in conjunction with tuned vibration absorbers (TVA), a simple mathematical model is developed. This mathematical model includes the mathematical model of a passive fluid mount, a TVA, and a spring representing the fuselage structure. The simulation results indicate that when passive fluid mounts are used in conjunction with TVAs, an active suspension system behavior is nearly created.
Highlights
In the past few years, the active suspension system research and development expenditure has risen considerably both in the academia and industry
Once the tuned vibration absorber (TVA) is installed on the vibrating machinery, the TVA goes to resonance instead of the main mass and as a result the motion and the vibration of the main mass is reduced
This project started with a design of a passive fluid mount for a business jet that had a soft fuselage structure
Summary
In the past few years, the active suspension system research and development expenditure has risen considerably both in the academia and industry. Active primary suspension systems have been successfully tested since 1970s, but very few cars do use active suspension systems primarily again due to cost. Those automotive companies that do provide active suspension systems to their customers, they do so as an option and not as a standard component. Since the cost of active suspension systems is high, one may wonder if it is possible to provide nearly the same noise and vibration reduction of an active suspension system, but only using passive systems. The focus of this paper will be on fixed wing applications and the use of passive fluid mounts in conjunction with tuned vibration absorbers, as an engine mounting system
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