Acoustic radiation simulation of forced vibrating plates using isogeometric analysis

Area of Science:

• Mechanical Engineering
• Acoustics
• Computational Mechanics

Background:

• Vibratory behavior and acoustic responses of plates are crucial in various industries.
• Existing research often relies on experimental or analytical methods, with limited focus on moving forces or near-field radiation.
• The finite element method is common, but its application to elastoacoustic response analysis has limitations.

Purpose of the Study:

• To apply isogeometric analysis (IGA) for studying the acoustic field radiated by a circular plate under impact and moving forces.
• To investigate the elastoacoustic response of plates using a novel computational approach.
• To analyze the near-field acoustic radiation of a plate subjected to a moving force.

Main Methods:

• Utilized isogeometric analysis (IGA), a novel method for this problem.
• Discretized Reissner-Mindlin theory and the Rayleigh integral equation using the Bézier extraction method.
• Modeled a circular plate embedded in a rigid baffle.

Main Results:

• Successfully applied IGA to analyze the acoustic field radiated by a circular plate.
• Demonstrated the capability of IGA to handle both impact and moving force excitations.
• Provided detailed analysis of near-field radiation patterns for plates under moving loads.

Conclusions:

• Isogeometric analysis is a viable and powerful tool for elastoacoustic problems involving plates.
• The study provides new insights into the acoustic radiation from plates subjected to dynamic loads, particularly moving forces.
• This research opens avenues for improved design and analysis in industries concerned with plate acoustics.