粘滞流体阻尼器冲击缓冲特性研究  

Shock absorption characteristics of a viscous fluid damper

作　　者：孙靖雅[1] 焦素娟[1] 张磊[2] 华宏星[1] 

机构地区：[1]上海交通大学机械系统与振动国家重点实验室,上海200240 [2]海军装备研究院舰船所,北京100037

出　　处：《振动与冲击》2013年第14期196-199,共4页Journal of Vibration and Shock

基　　金：国家自然科学基金(10872132)

摘　　要：为获得粘滞流体阻尼器冲击缓冲特性,设计并制作一种非牛顿流体粘滞阻尼器样机,而后对其进行了不同高度下的冲击缓冲实验。为从流体力学角度分析阻尼力机理,建立改进幂律模型来描述硅油的粘度特性,并通过对实验数据的拟合获得其中待定参数。采用FLUENT软件并结合动网格技术,对阻尼器流场仿真后获得冲击载荷作用下阻尼力输出特性,将之与实验结果相对比,发现结果基本一致,可用于指导阻尼器初步设计。To obtain shock absorption characteristics of a viscous fluid damper,a non-Newtonian fluid damper was designed and made,and then shock tests were performed for it under various height conditions.To analyze the damping force mechanism from the aspect of fluid dynamics,a modified power law function model was used to describe the viscosity of silicone oil,and the parameters of the model was determined with the measured viscosity data under various shear rates.CFD software FLUENT was adopted and combined with the dynamic meshing technology to obtain the characteristics of damping force under shock conditions.By comparing the results of tests and those of simulations,it was indicated that both the results approximately match each other and they can be used to guide damper designs.

关 键 词：阻尼器 冲击缓冲 FLUENT 幂律流体 数值仿真 

分 类 号：TB535.1[理学—物理]