基于附板的结构振动抑制与传递衰减特性研究  

Vibration suppression and transfer attenuation of a structure based on an additional plate

作　　者：向建华[1] 廖日东[1] 蒲大宇[1] 

机构地区：[1]北京理工大学机械与车辆工程学院,北京100081

出　　处：《振动与冲击》2010年第1期12-16,共5页Journal of Vibration and Shock

基　　金：国防"973"重大项目(1030021210710)

摘　　要：针对在侧板上连接附板所形成的T型连接结构,开展了振动衰减特性的机理分析。在此基础上,运用有限元法系统地探讨了附板各结构参数变化对结构振动的抑制和传递衰减规律,并将研究成果应用到内燃机油底壳挡油板的改进设计中。结果表明,附板厚度相比其它结构参数能更显著地降低局部区域的振幅,衰减振动的传递;双层附板与增加板厚有相同的振动抑制和传递衰减变化趋势,但其效果要好于单层附板厚度增加。Aiming at a T-shape structure formed by a lateral plate and an additional plate,theoretical analysis of its vibration attenuation characteristics was done.Using finite element method,the laws of the structural vibration suppression and transfer attenuation versus the various parameters of the additional plate were systematically studied.Based on these results,the oil baffle of an oil pan was modified.The study showed that compared with other structural parameters of the oil baffle,the plate thickness can more significantly decrease the vibration amplitude of the local area and weaken the transfer of vibration;moreover,a double-layer additional plate has the same change trend of vibration suppression and transfer attenuation as that of the plate thickness increasing of a one-layer additional plate,but the former has better effects.

关 键 词：T型结构 振动抑制 传递衰减 挡油板 

分 类 号：TU433[建筑科学—岩土工程]