半クレータ型新波動ブラックホールの有限要素法制振特性解析

抄録

This paper deals with vibration damping analysis using finite element method with Model Strain Energy Method for flat plate having new type acoustic black holes． The new black holes have shapes like half of craters． Viscoelastic vibration damping materials are laminated on the plate at the acoustic black holes． The flat plate is fixed at two edges where the acoustic black hole doesn’t exist． The damping layer is modeled by linear solid finite elements in consideration of complex modules of elasticity． We calculated modal loss factors and eigenmodes of the models using Modal Strain Energy (MSE) method． We clarified effects of the new acoustic black hole on the modal damping for each eigenmode．