Vibration Control of a Composite Panel Carrying Concentrated Masses Under Different Boundary Conditions

Kouhi, Mohsen; Mojtahedi, Alireza; Dadashzadeh, Mehran; Ebrahimi, Shabnam

doi:10.22034/ijcoe.2025.513241.1151

Vibration Control of a Composite Panel Carrying Concentrated Masses Under Different Boundary Conditions

Document Type : Original Research Article

Authors

Mohsen Kouhi ¹

Alireza Mojtahedi

Mehran Dadashzadeh ¹

shabnam Ebrahimi ²

¹ Dept. of Water Resources Engineering, Faculty of Civil Engineering, University of Tabriz, Iran

² Dept. of Mechanical Engineering, Sahand University of Technology, Tabriz, Iran

10.22034/ijcoe.2025.513241.1151

Abstract

Composite panels are commonly used structural forms in marine environments, subjected to complex dynamic loads and vibration forces due to harsh operational conditions. Understanding their vibrational behavior is crucial for ensuring structural reliability and performance. The presence of localized mass variations, such as concentrated masses from attached equipment or marine growth, significantly influences their dynamic response. This study investigates the impact of concentrated masses on the vibrational characteristics of a composite panel under fixed and pinned boundary conditions through comprehensive experimental and numerical analyses. A finite element (FE) model was developed and updated based on experimental modal analysis results. The findings reveal that the location and magnitude of concentrated masses play a critical role in altering mode shapes and reducing natural frequencies. The introduction of concentrated masses leads to a systematic frequency shift, with greater reductions observed for higher mass magnitudes. The validated FE model enables an extended parametric analysis, reducing the dependency on extensive experimental testing. These insights provide a foundation for optimizing vibration control strategies in composite marine structures, contributing to improved design methodologies for enhanced structural integrity and performance.

Keywords

Composite panel

Vibration behavior

Concentrated mass effect

Updated FE model

Vibration control

Subjects