Model Updating for a Welded Structure Made from Thin Steel Sheets

Rani, M. N. Abdul; Stancioiu, Dan; Yunus, M. A.; Ouyang, Hua; Deng, Huaxia; James, Stephen W.

doi:10.4028/www.scientific.net/amm.70.117

Cited by 24 publications

(5 citation statements)

References 78 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The bending moment of inertia ratio (BMIR) available in MSC Nastran, which has been successfully implemented by Yunus (2011) and Abdul Rani (2012) in investigating the effect of the preload because of the bolts and washers; and in investigating the effect of the welding process, respectively, was used in this study to represent the accumulated axial stress effect in the adhesive assembly fabrication process.…”

Section: Mu Of the Adhesive Jointed Structurementioning

confidence: 99%

“…BMIR is the ratio of the actual bending moment inertia of the shell element, I , to the bending moment of inertia of a shell element, T3/12, where T is the thickness of the element. I is given as in equation (6) (Abdul Rani, 2012)where W is the width of the element. Therefore, the BMIR is given as (The MSC Software Corporation, 2013)…”

Section: Mu Of the Adhesive Jointed Structurementioning

confidence: 99%

“…Several researchers have investigated uncertainties that influence the natural frequency of the structure such as the initial stress and/or initial curvature of a structure in the welded and bolted joint model (Abdul Rani et al, 2011; Peter et al, 2019a, 2019b; Yunus, 2011). However, to the best of the authors’ knowledge, no work has been done on the MU of adhesive jointed structures.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Finite element model updating of composite with adhesive jointed structure under built-up internal stress

Basri

Chae

Lee

2021

Journal of Vibration and Control

View full text Add to dashboard Cite

Highly complex engineering structures such as the body-in-white of a car consist of hundreds of different parts that are assembled using various types of joints such as welded and adhesive joints. The finite element method has been used extensively in various engineering fields to predict and analyze the dynamic behavior of assembled structures. However, despite the use of well-characterized individual subcomponent models, the predicted results frequently differ from measured results. This is believed to be because of the invalid assumptions of the joint model such as the material properties and other uncertainties associated with the assembly. This study investigated the use of a model updating method (MSC Nastran SOL 200) to identify the invalid assumptions and uncertainties in adhesive jointed composite structures and to minimize the difference between predicted and measured results. Results revealed that the stresses built-up in a structure during the assembly process are permanently retained in the structure after the adhesive is completely cured and that they cause a local stress stiffening effect, which is believed to affect the resonance frequencies of the structure. Introducing the effect of the stresses as an updating parameter in the model updating process increases the prediction accuracy.

show abstract

Section: Mu Of the Adhesive Jointed Structurementioning

confidence: 99%

Section: Mu Of the Adhesive Jointed Structurementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Finite element model updating of composite with adhesive jointed structure under built-up internal stress

Basri

Chae

Lee

2021

Journal of Vibration and Control

View full text Add to dashboard Cite

show abstract

“…The displacement amplitude is constant at each discrete frequency within the frequency range of the vibration mode. In modal analysis, the equation of motion for the dynamic response of a linear model describing structural motion is a second-order differential equation [18]- [20], as in Eq. ( 1).…”

Section: Introductionmentioning

confidence: 99%

Reliability of Response-Controlled Stepped Sine Testing for Experimental Detection of Nonlinear Structure

Yunus,

A.R. Bahari,

M.N. Abdul Rani

et al. 2023

Int. J. Automot. Mech. Eng.

View full text Add to dashboard Cite

Nonlinear structural dynamic analysis is required for mechanical structures experiencing nonlinearity through large force-vibration response ranges. Nonlinearities can be caused by large vibration displacements, material properties, or joints. Experimental modal analysis for nonlinear detection is achieved using conventional force-controlled stepped sine testing. However, this approach often encounters premature jumps in frequency response curves before reaching actual resonance peaks. In recent years, response-controlled stepped sine testing (RCT) has been introduced to precisely quantify resonant peaks. This approach, however, has only been limitedly utilised to detect and analyse nonlinearity in jointed structures and structures experiencing large displacement. In this paper, the reliability of the RCT approach is assessed for detecting nonlinearity from different sources. The experimental setup involves placing two magnets on opposite sides of a plate's free end to induce localised nonlinearity through magnet attraction. A low force magnitude of random excitation is employed to identify the frequency range of the first vibration mode using an electromagnetic shaker. Subsequently, RCT is performed within this range to measure the nonlinear forced response. Frequency response functions are measured at ten different controlled displacement amplitudes at the driving point. The analysis observed a symmetry curve of response in the measured FRFs. The results indicate that nonlinear hardening is detected at structures with localised magnet attraction. In conclusion, the reliability of applying the RCT approach for detecting nonlinearity from magnet attraction is achieved due to the absence of a jump issue in FRFs.

show abstract

“…is the external force vector. For the free vibration of an undamped finite element model, the equation of motion [2,3] can be calculated using Eq. 2.…”

Section: Introductionmentioning

confidence: 99%

Modelling the Stiffness Element in the Multi-Degree of Freedom Mass-Spring System

Bahari

Yunus

Rani

et al. 2020

AMM

View full text Add to dashboard Cite

Structural dynamics in structural engineering analysis involves the modal parameters (natural frequency, mode shape and damping ratio). The modal parameters of engineering structures is mainly influenced by the damping and stiffness properties. This research paper presents the reliability of CELAS element in the finite element modelling to represent the stiffness parameter. The simplified engineering structure considered in this study is a mass-spring system with multi-degree of freedom. Experimental modal testing is performed using an electro-magnetic vibration shaker as an exciter and an accelerometer to record the natural frequency of the system. HyperMesh normal mode analysis is used to compute the natural frequency of the mass-spring system. The comparative evaluation is performed in order to identify the accuracy of the natural frequencies obtained from the modelling analysis and the measured counterparts. Consequently, it is found that the element CELAS has a good capability to represent as the stiffness parameter in the finite element modelling.

show abstract

Model Updating for a Welded Structure Made from Thin Steel Sheets

Cited by 24 publications

References 78 publications

Finite element model updating of composite with adhesive jointed structure under built-up internal stress

Finite element model updating of composite with adhesive jointed structure under built-up internal stress

Reliability of Response-Controlled Stepped Sine Testing for Experimental Detection of Nonlinear Structure

Modelling the Stiffness Element in the Multi-Degree of Freedom Mass-Spring System

Contact Info

Product

Resources

About