Extraction of Static Car Body Stiffness from Dynamic Measurements

Deleener, Jan; Mas, Peter; Cremers, Luc; Poland, J. B.

doi:10.4271/2010-01-0228

Cited by 9 publications

(2 citation statements)

References 1 publication

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“…Knowing the geometrical quantities (force arm) and the value of the applied load, we can estimate the moment and by measuring the angle change, we are able to calculate the torsional rigidity of the frame or vehicle body (Table 1). It should be emphasized that depending on the section on which the body is bolted, we will get different values of its torsional stiffness [14,25].…”

Section: List Of Results Of Numerical Analyses and Calculation Of Sti...mentioning

confidence: 99%

Testing of the torsional stiffness of the passenger car frame and its validation by means of finite element analysis

Podkowski

Małczuk

Stasiak

et al. 2019

The Archives of Automotive Engineering – Archiwum Motoryzacji

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The paper presents the results of the conducted tests of torsional stiffness of the VOSCO S106 passenger car, as well as the validation process of these tests by means of numerical analyzes using the FEM finite element method. The most important element of the vehicle structure is the part of the spatial frame or the safety cage. Engine, brake system, fuel system and steering system, suspension as well as body and parts, their mounting nodes, hinges, locks, etc. are attached to the frame. The frame must therefore have adequate strength to protect the driver in the event of a tipover or impact. The frame is usually made of steel pipes with the prescribed dimensions and strength according to regulations. The torsional stiffness of the vehicle chassis has a significant influence on its driveability and therefore is an important parameter to measure. In this article, the torsional stiffness of the vehicle frame is calculated experimentally, which was then verified by finite element analysis (FEM) using the Altair HyperWorks program.

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Section: List Of Results Of Numerical Analyses and Calculation Of Sti...mentioning

confidence: 99%

Testing of the torsional stiffness of the passenger car frame and its validation by means of finite element analysis

Podkowski

Małczuk

Stasiak

et al. 2019

The Archives of Automotive Engineering – Archiwum Motoryzacji

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show abstract

“…This approach is relatively accurate but requires a full modal compliance matrix to be determined. Poland et al [20,21] found that torsional and bending stiffness can be estimated from the frequency response matrix estimated on a few degrees of freedom with a good accuracy. The proposed methods are able to accurately estimate the bending and torsional stiffness, but require much additional information such as the number of testing points and their optimal locations.…”

Section: Introductionmentioning

confidence: 99%

Localising the Smallest Stiffness and its Direction of a Homogeneous Structure by Spectral and Optimisation Approaches

Henyš¹,

Sutula²,

Kopal³

et al. 2020

Preprint

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Structural stiffness plays an important role in engineering design. The analysis of stiffness requires precise experiments and computational models that can be difficult or time-consuming to procure. A novel relation between modal and static stiffness based on modal decomposition is introduced in this study. This relation allows analysing the smallest structural stiffness and its direction. Further, it is shown that the smallest stiffness can be found using an optimisation algorithm that is based on the maximisation of structural compliance. Both approaches are compared on several computational examples leading to similar results in terms of smallest stiffness and its direction. The proposed approaches serve as quantitative/qualitative tools for the analyses of structural stiffness, particularly in structural health monitoring.

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Static Torsional Stiffness from Dynamic Measurements Using Impedance Modeling Technique

Pasha

Allemang

Brown

et al. 2014

Dynamics of Coupled Structures, Volume 1

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Extraction of Static Car Body Stiffness from Dynamic Measurements

Cited by 9 publications

References 1 publication

Testing of the torsional stiffness of the passenger car frame and its validation by means of finite element analysis

Testing of the torsional stiffness of the passenger car frame and its validation by means of finite element analysis

Localising the Smallest Stiffness and its Direction of a Homogeneous Structure by Spectral and Optimisation Approaches

Static Torsional Stiffness from Dynamic Measurements Using Impedance Modeling Technique

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