基于振动功率流的板-壳耦合结构振动传递特性研究  

Study on Vibration Transmission Characteristic of Plate-shell Hybrid Structures Based on Vibration Power Flow

作　　者：李鑫淼 谢坤 LI Xinmiao;XIE Kun(College of Engineering,Huazhong Agricultural University,Wuhan 430070,China;College of Mechanical and Electrical Engineering,Central South University,Changsha 410083,China)

机构地区：[1]华中农业大学工学院,武汉430070 [2]中南大学机电工程学院,长沙410083

出　　处：《噪声与振动控制》2023年第1期37-42,共6页Noise and Vibration Control

基　　金：国家自然科学基金资助项目(51909098)。

摘　　要：为探究板壳间的振动传递机理,建立一种L型板-圆柱壳耦合结构有限元模型,并结合有限元理论给出板壳间振动传递功率的计算方法。利用ANSYS计算板-壳耦合结构的振动传递功率,分析L型板夹角、板长、板厚及激励等因素对结构振动传递的影响。研究发现,可以通过减小L型板夹角、增大板长和板厚、合理调整激励方向及位置等方式降低结构振动传递功率,减小板壳间振动传递的能量,改善结构的振动传递特性。To investigate the mechanism of vibration transmission between plates and shells, a finite element model of L-shaped plate-cylindrical shell hybrid structures is developed. The vibration transmission power of the hybrid plate-shell structures is calculated by Ansys software, and the influences of the angle and length of L-shaped plate, the thickness of plate and the excitation on the vibration transmission are analyzed. It is found that the vibration transmission power and the vibration transmission energy between plates and shells can be reduced by reducing the angle between L-shaped plates,increasing the length and thickness of plates, and adjusting the excitation direction and position reasonably. Accordingly, the vibration transmission characteristics can be improved.

关 键 词：振动与波 板-壳耦合结构 有限元法 振动传递功率 ANSYS 

分 类 号：O327[理学—一般力学与力学基础]