热荷载作用下薄板振动能流的可视化研究  

Vibration Power Flow Visualization of Thin Plate under Thermal Load

作　　者：耿雪若 陈涛[1] 

机构地区：[1]哈尔滨工程大学理学院,黑龙江哈尔滨150001

出　　处：《力学季刊》2017年第3期503-509,共7页Chinese Quarterly of Mechanics

基　　金：中央高校基本科研业务费专项资金;黑龙江省自然科学基金(LC2016001)

摘　　要：基于振动声强法研究了热荷载作用下矩形薄板中振动能量的传递和分布特性.首先,得到热荷载作用下薄板的振动方程,并详细给出了热荷载作用下薄板振动声强的表达式,可利用模态叠加法求出薄板振动的横向位移.之后,利用流线可视化技术,通过流线图显示出薄板振动时能量流出的位置,能量被吸收的位置和能量的流动路径.最后,通过具体的数值算例分析了热荷载和机械荷载对薄板振动时能量流动的影响,数值模拟表明施加热荷载后会改变机械荷载对薄板中振动能量流动的影响,使振动能量的流动路径发生明显改变,且在不同的热荷载作用下,通过改变机械荷载可以抵消热荷载对振动能量流动的影响.The characteristics of transmission and distribution of vibration power flow in rectangular thin plate under thermal load were analyzed by Vibration Intensity Method. Firstly, the vibration equations of thin plate under thermal loads were obtained, the formulations for vibration intensity under thermal loads were given. Then, the lateral displacements of the thin plate in vibration can be calculated by using Mode Superposition Method. Next, based on the streamline visualization technology, the location of the source, the location of the energy dissipation and the power flow paths in plate structures can be determined by streamline diagrams. Finally, we analyze the influence of mechanical load and thermal load on the vibration power flow in thin plate through a specific numerical example. The results indicate that the influence of mechanical load on the power flow paths can be changed when the thermal load is imposed, and the effect of the thermal load on the vibration power flow can be eliminated by changing the external mechanical load when different thermal load is imposed.

关 键 词：板 热荷载 振动能流 流线可视化 

分 类 号：O343.6[理学—固体力学]