Finite Element Modelling and Analysis for Dynamic Investigation of a Laser Spot Welded Hat-Plate Structure under Initial Stress Influence

1st South Aceh International Conference on Engineering and Technology

工业技术（总论）

Peter, C.^1 ; Abdul Rani, M.N.^1 ; Starbuck, D.P.^2 ; Yunus, M.A.^1 ; Rezali, K.A.M.^3 ; Mohd Zin, M.S.^1

Structural Dynamics Analysis and Validation (SDAV), Faculty of Mechanical Engineering, Universiti Teknologi MARA (UiTM), Selangor, Shah Alam

40450, Malaysia^1

Opus International, 3800 Parkside, Birmingham Business Park, Birmingham

B37 7YG, United Kingdom^2

Sound and Vibration Research Group, Department of Mechanical and Manufacturing, Faculty of Engineering, Universiti Putra Malaysia (UPM), Serdang, Selangor

43400, Malaysia^3

关键词: Dynamic behaviours;    Experimental modal analysis;    Experimental modeling;    Finite element modelling;    Free boundary conditions;    Impact hammer testing;    Initial stress;    Model updating;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/506/1/012065/pdf
DOI  :  10.1088/1757-899X/506/1/012065

学科分类：工业工程学

来源: IOP

【 摘 要 】

This paper presents the finite element modelling and analysis of the dynamic behaviour of a laser spot welded structure under the influence of initial stress. Modal based updating with a new scheme was used to improve the finite element model of the structure. Element connectors with CWELD ELPAT format were used to represent the laser spot welded in the structure. The modal parameters of the structure were measured using impact hammer testing and roving accelerometers under free-free boundary conditions. NASTRAN SOL 200 was used in updating the finite element model in light of the experimental results. In this study, it was found that modal updating with the new scheme has successfully matched the finite element model of the welded structure with the experimental model. The achievement demonstrates the accuracy and efficiency of the proposed new scheme.