Prediction of NVH behaviour of trimmed body components in the frequency range 100–500Hz

Cameron, Christopher John; Wennhage, Per; Göransson, Peter

doi:10.1016/j.apacoust.2010.03.002

Cited by 27 publications

(14 citation statements)

References 13 publications

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“…Although the model of composite + flat steel plate determined by FEM suits the aim of this investigation, in order to study a more complicated system using the presented approach, an accurate modelling of Metal Sheet and Multilayer Composite as shown in Figure 3 would be computationally quite expensive due to the small thicknesses and necessity for a great number of elements. A sandwich modelling approaches more suitable to an industrial environment focus on equivalent shells or homogeneous three-dimensional element with isotropic properties will be viable [ 44 ]…”

Section: Resultsmentioning

confidence: 99%

“…It also differs from investigations where the vibrational behaviors of thin steel sheets have been studied in that this work presents a composite computational model simulated by the finite element method (FEM), this model was used to conduct parametric study, and the most influential factors for 1st, 2nd and 3rd mode were identified using an ANOVA multifactor analysis. This studied composite formed by a core of polyurethane foam differs from investigations where acoustical absorption is the main function of this type of composite [ 44 ]. The experimental tests have been performed with low-complexity instrumentation.…”

Section: Introductionmentioning

confidence: 99%

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Application of an Instrumental and Computational Approach for Improving the Vibration Behavior of Structural Panels Using a Lightweight Multilayer Composite

Sánchez

García

Pérez

et al. 2014

Sensors

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This work presents a hybrid (experimental-computational) application for improving the vibration behavior of structural components using a lightweight multilayer composite. The vibration behavior of a flat steel plate has been improved by the gluing of a lightweight composite formed by a core of polyurethane foam and two paper mats placed on its faces. This composite enables the natural frequencies to be increased and the modal density of the plate to be reduced, moving about the natural frequencies of the plate out of excitation range, thereby improving the vibration behavior of the plate. A specific experimental model for measuring the Operating Deflection Shape (ODS) has been developed, which enables an evaluation of the goodness of the natural frequencies obtained with the computational model simulated by the finite element method (FEM). The model of composite + flat steel plate determined by FEM was used to conduct parametric study, and the most influential factors for 1st, 2nd and 3rd mode were identified using a multifactor analysis of variance (Multifactor-ANOVA). The presented results can be easily particularized for other cases, as it may be used in cycles of continuous improvement as well as in the product development at the material, piece, and complete-system levels.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Application of an Instrumental and Computational Approach for Improving the Vibration Behavior of Structural Panels Using a Lightweight Multilayer Composite

Sánchez

García

Pérez

et al. 2014

Sensors

View full text Add to dashboard Cite

show abstract

“…Directed at the low and middle frequency noise problem existing in FR cars, the full vehicle finite element model was established for NVH analysis [11]. The vibration energy characteristics were analyzed through using substructure power flow, and an improvement scheme was proposed to verify the scheme by experiment test.…”

Section: Full Vehicle Finite Element Model For Nvh Analysismentioning

confidence: 99%

Full Vehicle Vibration and Noise Analysis Based on Substructure Power Flow

Liu

Yuan

Xiao

et al. 2017

Shock and Vibration

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Combining substructure and power flow theory, in this paper an external program is written to control MSC. Nastran solution process and the substructure frequency response are also formulated accordingly. Based on a simple vehicle model, characteristics of vibration, noise, and power flow are studied, respectively. After being compared with the result of conventional FEM (finite element method), the new method is confirmed to be feasible. When it comes to a vehicle with the problem of low-frequency noise, finite element models of substructures for vehicle body and chassis are established, respectively. In addition, substructure power flow method is also employed to examine the transfer characteristics of multidimensional vibration energy for the whole vehicle system. By virtue of the adjustment stiffness of drive shaft support and bushes at rear suspension lower arm, the vehicle interior noise is decreased by about 3 dB when the engine speed is near 1050 rpm and 1650 rpm in experiment. At the same time, this method can increase the computation efficiency by 78%, 38%, and 98% when it comes to the optimization of chassis structure, body structure, and vibration isolation components, respectively.

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“…As part of the validation process of the numerical experiment, the first step adopted in this study was to perform experimental modal analysis of the cavity, in which one expects a correlation regarding the global modes, and to determine how the damping behaviour of these cavities would vary in frequency when comparing various types of vehicles (Cameron et al, 2010;Kumar et al, 2013).…”

Section: Experimental Methodologymentioning

confidence: 99%

The Effect of the Cavity Damping on Vehicular Evaluation using the Finite Element Method

Ferreira¹,

Magalhães²,

Moura³

et al. 2016

Archives of Acoustics

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This work focuses on finding a numerical solution for vehicle acoustic studies and improving the usefulness of the numerical experimental parameters for the development stage of a new automotive project. Specifically, this research addresses the importance of modal cavity damping for vehicle exerts during numerical studies. It then seeks to suggest standardized parameter values of modal cavity damping in vehicular acoustic studies.The standardized value of modal cavity damping is of great importance for the study of vehicular acoustics in the automotive industry because it would allow the industry to begin studies of the acoustic performance of a new vehicle early in the conception phase with a reliable estimation that would be close to the final value measured in the design phase. It is common for the automotive industry to achieve good levels of numerical-experimental correlation in acoustic studies after the prototyping phase because this phase can be studied with feedback from the simulation and experimental modal parameters.Thus, this research suggests values for modal cavity damping, which are divided into two parts due to their behaviour: ξ(x) = −0.0126(x − 100) + 6.15 as a variable function to analyse up to 100 Hz and 6.15% of modal cavity damping constant for studies between 30 Hz and 100 Hz.The sequence of this study shows how we arrived at these values.

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Prediction of NVH behaviour of trimmed body components in the frequency range 100–500Hz

Cited by 27 publications

References 13 publications

Application of an Instrumental and Computational Approach for Improving the Vibration Behavior of Structural Panels Using a Lightweight Multilayer Composite

Application of an Instrumental and Computational Approach for Improving the Vibration Behavior of Structural Panels Using a Lightweight Multilayer Composite

Full Vehicle Vibration and Noise Analysis Based on Substructure Power Flow

The Effect of the Cavity Damping on Vehicular Evaluation using the Finite Element Method

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