Optimization of Damping Treatment for Structure Borne Noise Reduction

Subramanian, Shankar C.; Surampudi, R.; Thomson, Kevin; Vallurupalli, S.S.

doi:10.4271/2003-01-1592

Cited by 29 publications

(29 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Supporting this statement, the effectiveness of CLD is evident from literature with it being considered in various transport systems such as ship [Pang et al, 2014], tractor [Cao, 2005], truck [Subramanian et al, 2004], aircraft [Boily and Charron, 1999], and helicopter [Caillet et al, 2012]. Some even attempted to introduce active control system into CLD [Poh et al, 1996].…”

Section: Viscoelastic Damping Treatmentmentioning

confidence: 76%

Acoustic Metamaterials: A Potential for Cabin Noise Control in Automobiles and Armored Vehicles

Ang

Koh²,

Lee

2016

Int. J. Appl. Mechanics

View full text Add to dashboard Cite

The aim of this paper is to provide an overview of the existing industrial practices used for cabin noise control in various industries such as automotive, marine, aerospace, and defense. However, emphasis is placed on automobiles and armored vehicles. Generally, automobile cabins usually constitute of thin structural panels, where the fundamental frequency typically falls below 200[Formula: see text]Hz. If a specific structural mode couples with a specific acoustic mode of the cabin, booming noise occurs. As such, discomfort may be felt by the occupants. Fundamentally, vibroacoustics problems may be minimized if the acoustic modes and the structural modes are decoupled, which is achieved usually by structural modifications or acoustical treatments. However, if excessively performed, the weight limitation of an automobile design will be exceeded; not to mention the adverse effect of increased weight on several factors such as fuel efficiency, mileage life of tires and acceleration of the vehicle. Moreover, current solutions have several drawbacks in low frequency noise control. In light of this, it is of great interest to explore the feasibility of acoustic metamaterials as an alternative with hope to improve cabin noise.

show abstract

Section: Viscoelastic Damping Treatmentmentioning

confidence: 76%

Acoustic Metamaterials: A Potential for Cabin Noise Control in Automobiles and Armored Vehicles

Ang

Koh²,

Lee

2016

Int. J. Appl. Mechanics

View full text Add to dashboard Cite

show abstract

“…Structural models are considered reliable and can be used, for example, to locate possible locations for surface damping treatments [13]. Capturing the frequency and temperature dependant damping properties of viscoelastic materials such as anti-flutter adhesives is a more complicated matter, which requires a rigorous testing program to evaluate the material [14].…”

Section: Computational Methods In Acousticsmentioning

confidence: 99%

Proposal of a Methodology for Multidisciplinary Design of Multifunctional Vehicle Structures including an Acoustic Sensitivity Study

Cameron¹,

Lind²,

Wennhage³

et al. 2009

Int. J. Vehicle Structures and Systems

View full text Add to dashboard Cite

In this paper, a design methodology is proposed, wherein tools and knowledge from the areas of structural design, numerical optimization, and noise, vibration and harshness (NVH) engineering are combined into a single toolbox for vehicle design. The methodology attempts to address the topic of sustainable development from both economic and environmental perspectives within the vehicle industry. A brief review of the topics of NVH and numerical optimization is given for the purposes of disseminating knowledge. Finite element codes for predicting structural and acoustic response are implemented within the iterative design methodology, which is explained for generic problems. Specific focus is placed on the need for understanding functional requirements of the entire system rather than its components. The methodology is implemented in an automotive case study. The results in terms of design solution and development framework are evaluated and discussed. As part of this evaluation, and integral to the design process, an acoustic sensitivity analysis of the final solution is performed and the results are presented.

show abstract

“…As cavity diameters are on the microscale, computational capacity of current computers prevents the direct modelling of these structures, as cell numbers in a Finite Element solver would be excessive. To account for their effect, they can simply be modelled as non-structural masses added to the load-carrying structure [21,22,23,24] or by applying the so-called Biot-theory for modelling PEM materials. Biot-theory describes the behaviour of PEM materials using about 13 macroscopic parameters (the number depends on the equation formulation) [10,11,12,13], which are extracted from measurements.…”

Section: Poroelastic Materials (Pem) Modellingmentioning

confidence: 99%

Review of Finite Element Vehicle Interior Acoustic Simulations Including Porous Materials

Kun

Feszty

2019

Acta Tech Jaur

View full text Add to dashboard Cite

Recent trends in vehicle engineering require manufacturers to develop products with highly refined noise, vibration and harshness levels. The use of trim elements, which can be described as Poroelastic materials (PEM), are key to achieve quiet interiors. Finite Element Methods (FEM) provide established solutions to simple acoustic problems. However, the inclusion of poroelastic materials, especially at higher frequencies, proves to be a difficult issue to overcome. The goal of this paper was to summarize the state-of-the-art solutions to acoustic challenges involving FEM-PEM simulation methods. This involves investigation of measurement and simulation campaigns both on industrial and fundamental academic research levels.

show abstract

Optimization of Damping Treatment for Structure Borne Noise Reduction

Cited by 29 publications

References 1 publication

Acoustic Metamaterials: A Potential for Cabin Noise Control in Automobiles and Armored Vehicles

Acoustic Metamaterials: A Potential for Cabin Noise Control in Automobiles and Armored Vehicles

Proposal of a Methodology for Multidisciplinary Design of Multifunctional Vehicle Structures including an Acoustic Sensitivity Study

Review of Finite Element Vehicle Interior Acoustic Simulations Including Porous Materials

Contact Info

Product

Resources

About