摘要
利用有限元法,研究了激振源(换能器)面积的变化对矩形板条纹振动模态振动节线形状和节线分布的影响,计算了矩形板在频率约为15kHz、20kHz的条纹振动模态.结果表明:当激振源面积较小时,换能器的振动几乎不影响矩形板条纹振动模式的振动特性;当激振源频率与矩形板本征频率相同且激振源半径增加到8.0mm时,条纹振动模式节线开始由直变曲,节线分布变的不规则.应用扫描式激光测振仪进行了测试,实验结果与有限元计算的结果一致.
The stripe vibration mode at 15 kHz and 20 kHz of rectangular plate are obtained by using of finite elements method,then the effect of excitation area （transducer） on the nodal line of the stripe vibration mode of rectangular plate is investigated.It shows that the vibration characteristics of the stripe vibration mode of rectangular plate were hardly affected by the vibration of the transducer with samll excitation area,the nodal line of stripe vibration mode obviously deformed irregularly with increase of the excitation radius to 8.0 mm,The experiment results by the aid of scanning laser vibrometer agree well with those of theoretical calculations.
出处
《陕西师范大学学报（自然科学版）》
CAS
CSCD
北大核心
2014年第2期46-49,共4页
Journal of Shaanxi Normal University：Natural Science Edition
基金
国家自然科学基金资助项目(11374201)
关键词
矩形板
条纹振动模式
激振面积
节线
rectangular plate
stripe vibration mode
excitation area
nodal line
