Target Setting and Prediction for Cabin Noise and Vibration in Aircraft Development

2017 ◽  
Author(s):  
Dirk von Werne ◽  
Stefano Orlando ◽  
Anneleen Van Gils ◽  
Thierry Olbrechts ◽  
Ivan Bosmans
Keyword(s):  
Target Setting ◽  
Noise And Vibration ◽  
Cabin Noise

Method for reducing aircraft cabin noise and vibration

1993 ◽  
Vol 93 (6) ◽  
pp. 3538-3538
Author(s):  
Bernard Magliozzi ◽  
Frederick B. Metzger
Keyword(s):  
Noise And Vibration ◽  
Aircraft Cabin ◽  
Cabin Noise

Single Pumper Semi-Active Fluid Mount

2003 ◽  
Author(s):  
Nader Vahdati ◽  
Mehdi Ahmadian
Keyword(s):  
Vibration Isolation ◽  
Frequency Tuning ◽  
Vibration Reduction ◽  
Track Length ◽  
Noise And Vibration ◽  
Aerospace Applications ◽  
Cabin Noise ◽  
Model And Simulation ◽  
The Right ◽  
Noise And Vibration Reduction

Passive fluid mounts have been in use in the automotive and aerospace applications for the purpose of cabin noise and vibration reduction since 1940s. Cabin noise and vibration isolation is provided at a frequency coined “notch frequency”. The design location of the notch frequency depends on the application, but with most applications, it is designed to coincide with the longest period of constant speed. To obtain greater cabin noise and vibration reduction at any desired frequency, the notch frequency needs to be as close to that desired frequency as possible. Unfortunately, due to tolerances on all the fluid mount dimensions, material property variations, and variation in elastomer molding processes, the notch frequency never ends up at the right location on the first manufacturing pass. Since none of the passive fluid mount parameters are controllable, the only way to tune the mount is to redesign the mount by changing fluid, changing inertia track length or diameter, or changing rubber stiffness. This trial and error manufacturing process is very costly. To reduce the fluid mount notch frequency tuning cycle time, a new fluid mount design is proposed. In this paper, the new design concept, and its mathematical model and simulation results will be presented.

An assessment of in-cabin noise and vibration transfer in a hatchback

2016 ◽  
Vol 12 (4) ◽  
pp. 292
Author(s):  
Shyam Purusoth Parthasarathy ◽  
Omkar Sane ◽  
Nikhil Ramesh ◽  
Aravindhakshan Lakshminarasimhan ◽  
Chinnasamy Lakshmikanthan
Keyword(s):  
Noise And Vibration ◽  
Cabin Noise

An assessment of in-cabin noise and vibration transfer in a hatchback

2016 ◽  
Vol 12 (4) ◽  
pp. 292 ◽  
Author(s):  
Chinnasamy Lakshmikanthan ◽  
Nikhil Ramesh ◽  
Omkar Sane ◽  
Aravindhakshan Lakshminarasimhan ◽  
Shyam Purusoth Parthasarathy
Keyword(s):  
Noise And Vibration ◽  
Cabin Noise

scholarly journals Application of Tuned Vibration Absorbers in Fluid Mounts

2009 ◽  
Vol 16 (6) ◽  
pp. 565-580 ◽  
Author(s):  
Mohammad Jalali Mashayekhi ◽  
Nader Vahdati
Keyword(s):  
Vibration Isolation ◽  
Dynamic Stiffness ◽  
Vibration Reduction ◽  
Vibration Absorbers ◽  
Noise And Vibration ◽  
Tuned Vibration Absorbers ◽  
Cabin Noise ◽  
Model And Simulation ◽  
Isolation Requirements ◽  
Noise And Vibration Reduction

The need to reduce the fuel consumption of vehicles leads to having lighter chassis’ with lighter engines yet maintaining engine power. These new design requirements are in contrast with the vibration isolation requirements. To keep the vehicles light yet provide good cabin noise and vibration isolation, requires a new vibration isolation technology. Fluid mounts have been used in the aerospace and the automotive industry to provide cabin noise and vibration reduction for years. With the use of passive fluid mounts, the highest cabin noise and vibration reduction is achieved at a frequency called “Notch Frequency”. But typical passive fluid mounts have only one notch frequency. So the best cabin noise and vibration reduction is only achievable at one frequency. In this paper, a new fluid mount design in combination with a tuned vibration absorber is proposed. Bond graph modelling technique is used to model the new fluid mount design. The physical model and simulation results are presented. The effect of the natural frequency of the TVA on the dynamic stiffness of the fluid mount is studied.

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