摘要
研究梁板耦合结构的振动特性,以导纳理论为基础推导了系统各部分功率流表达式。通过数值仿真研究主要结构参数变化对系统功率流的影响。结果表明:梁、板厚度及梁长度影响功率流幅值的频带分布,而梁、板损耗因子的变化改变净功率流、总功率流和吸收功率流的大小,其中板角是较为理想的耦合位置。通过优化设计,对某工程结构的振动控制取得了一定效果。
The article analyzes the vibration characteristics of a girder-plate coupled structure. Based on admittance theory, the power flow equations of the members of the structure are formulated. Numerical simulation is carried out to study the influence of the major structural parameters on the power flow of the structure. Results indicate that the length and height of the beam and the thickness of the plate have some influence on frequency band distribution of the power flow amplitude. While variation of the loss factors of beam and plate makes changes of the total power flow, the net power flow, and the absorbed power flow. Comers of the plate are the best positions for coupling. According to these analyses, an optimal design of an engineering structure is made, and some effect is derived in the aspect of vibration control.
出处
《噪声与振动控制》
CSCD
北大核心
2009年第4期6-9,共4页
Noise and Vibration Control
关键词
振动与波
梁板耦合结构
振动特性
导纳理论
功率流
vibration and wave
girder-plate coupled structure
vibration characteristics, admittance theory, power flow
