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Verification-Based Modelling Framework For Dynamic Analysis Of Beam Systems Using LS-DYNA
 
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1
Hanoi Architectural University
 
2
Voronezh State Technical University
 
 
Corresponding author
Thuy Van Thi Tran   

Hanoi Architectural University
 
 
 
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ABSTRACT
This study presents a structured verification framework for assessing the applicability of the LS-DYNA finite element solver to the dynamic analysis of beam-type structural systems. The reliability of LS-DYNA is evaluated through representative benchmark problems in-volving free vibration, forced harmonic response, and moving load scenarios. Modal char-acteristics of straight beams with various boundary conditions are first analysed and com-pared with classical analytical solutions. The accuracy of the finite element modelling strategy is further examined for a simply supported beam subjected to a harmonic load ap-plied at midspan. A moving harmonic load is implemented using a nodal force approach along a predefined travel path and validated against solutions obtained via the Bubnov–Galerkin method in Wolfram Mathematica. Additionally, a coupled model of a sprung mov-ing mass traversing a beam with a localized surface irregularity is developed using contact algorithms to capture inertial interaction effects. Numerical results show close agreement with analytical solutions and published reference data, confirming modelling accuracy and numerical stability. The study establishes a verification-based modelling procedure and supports the broader application of LS-DYNA in structural dynamic analysis.
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