A Procedure for Efficient Trimmed Body FE Simulations, Based on a Transfer Admittance Model of the Sound Package

Courtois, Theophane; Bertolini, Clara; Ochs, J.

doi:10.4271/2010-01-1405

Cited by 12 publications

(7 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Again a truncation factor T = 2 is applied. No discontinuities can be seen at the interface between the two subdomains Ω (1) and Ω (2) , to 340 for subdomain Ω (1) and from 24 to 568 for subdomain Ω (2) at 200Hz, and from 28 to 452 for subdomain Ω (1) and from 48 to 756 for subdomain Ω (2) at 400Hz. As can be seen from those figures, the WBM with two subdomains obtains engineering accuracy very fast, but stagnates at a lower accuracy as compared to the WBM with one subdomain.…”

Section: Verification Case 1: Rectangular Poroelastic Domainmentioning

confidence: 98%

“…The top and the bottom layer contain material 1, the middle layer consists of material 3 of Table 200Hz absolute value of the shear stresses in the three layers calculated with the WBM at 600Hz using the potential formulation. The WB model contains 408 wave functions of each kind in subdomain Ω (1) and Ω (2) and 388 wave functions of each type in subdomain Ω (3) . Continuity is clearly obtained across the interfaces.…”

Section: Verification Case 3: Multilayer Examplementioning

confidence: 99%

“…Continuity is clearly obtained across the interfaces. In order to verify the coupling between the domains, Figure 25 shows the xcomponents of the displacement of the solid phases on the interface between Ω (1) and Ω (2) . Visually, there are no differences.…”

Section: Verification Case 3: Multilayer Examplementioning

confidence: 99%

“…Lightweight poroelastic materials are often used as efficient noise reduction measures in engineering applications such as automotive and aircraft interior noise [1,2]. Considerable efforts have been put in the development of robust prediction techniques which are capable of accurately describing damping phenomena of these materials.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

A Wave Based Method for the efficient solution of the 2D poroelastic Biot equations

Deckers

Hörlin²,

Vandepitte

et al. 2012

Computer Methods in Applied Mechanics and Engineering

View full text Add to dashboard Cite

The vibro-acoustic behaviour of poroelastic materials is often formulated as boundary value problems based on the continuum mechanics Biot's theory expressed as two coupled partial differential equations. This paper presents an extension of the Wave Based Method (WBM), a numerical technique to solve these vibro-acoustic boundary value problems in a computationally efficient manner.At present, the Finite Element Method (FEM) is the most commonly used prediction technique to deal with these Biot equations, but suffers from the disadvantage that the system matrices have to be recalculated for each frequency of interest due to the frequency-dependent equation parameters.This harms the inherent effectiveness of the FEM. Additionally, due to the discretisation into a large number of small finite elements and the high number of unknowns per node, the computational efforts involved practically restrict the use of FEM to low-frequency applications. The method discussed in this paper is based on an indirect Trefftz approach. Exact solutions of the three coupled waves, supported by Biot's equations, are used as basis functions in a solution expansion to approximate the field variables in a poroelastic boundary value problem. This approach leads to smaller systems of equations, enabling an efficient solution at higher frequencies.

show abstract

Section: Verification Case 1: Rectangular Poroelastic Domainmentioning

confidence: 98%

Section: Verification Case 3: Multilayer Examplementioning

confidence: 99%

Section: Verification Case 3: Multilayer Examplementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A Wave Based Method for the efficient solution of the 2D poroelastic Biot equations

Deckers

Hörlin²,

Vandepitte

et al. 2012

Computer Methods in Applied Mechanics and Engineering

View full text Add to dashboard Cite

show abstract

“…The classic Finite Element Method (FEM) is a well-framed and accurate method that requires a finite element discretisation of the whole model, implicitly limiting its application range [1,2,3,4,5]. Alternative formulations have also been proposed to reduce the computational effort of the method [6,7,8].…”

Section: Introductionmentioning

confidence: 99%

Simulating the sound transmission loss of complex curved panels with attached noise control materials using periodic cell wavemodes

et al. 2019

View full text Add to dashboard Cite

The sound transmission loss of complex curved aircraft panels under diffuse acoustic field excitation is experimentally and numerically studied. Two different aircraft sidewall panels are considered: a thick composite sandwich panel and a thin aluminium panel with stiffening elements (stringers and frames). Both bare configuration and with attached soundproofing material are tested in laboratory conditions in coupled rooms. The numerical approach relies on a wave finite element method including modal order reduction at cell scale and an extension based on the transfer matrix method, for the inclusion of poroelastic treatments. The results obtained show that the proposed numerical scheme is efficient for predicting the sound transmission loss of such complex structures.

show abstract

Importance of the evaluation of structure-borne NVH performance for lightweight trim design

et al. 2019

View full text Add to dashboard Cite

A Procedure for Efficient Trimmed Body FE Simulations, Based on a Transfer Admittance Model of the Sound Package

Cited by 12 publications

References 14 publications

A Wave Based Method for the efficient solution of the 2D poroelastic Biot equations

A Wave Based Method for the efficient solution of the 2D poroelastic Biot equations

Simulating the sound transmission loss of complex curved panels with attached noise control materials using periodic cell wavemodes

Importance of the evaluation of structure-borne NVH performance for lightweight trim design

Contact Info

Product

Resources

About