瞬态冲击作用下油液阻尼器粘性温升的理论与实验研究  

THEORETICAL MODELING AND EXPERIMENTAL STUDY ON THE VISCOUS HEATING OF FLUID DAMPER UNDER SHOCK ENVIRONMENT

作　　者：褚德英[1] 张志谊[1] 王贡献[1] 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

出　　处：《振动与冲击》2008年第8期34-37,共4页Journal of Vibration and Shock

基　　金：海军装备部抗冲击试验设备研制项目资助(05131-1046)

摘　　要：提出了一种能够对被测试件进行瞬间制动的流体阻尼器结构,产生抗冲击测试中的负冲击加速度波形。基于流体单元中热传递的三维能量方程,构建了油液阻尼器内粘性温升的理论模型,对阻尼器在瞬态冲击作用下的油液温升进行了预测。为验证理论模型的有效性,更好的了解阻尼器结构内的油液温升情况,对阻尼器在冲击试验机上以不同冲击速度进行了一系列的试验。试验结果表明,理论模型能够比较可靠的对阻尼器内的粘性温升进行预测。A specially designed fluid damper used as negative shock pulse generator in the shock resistance test system to dissipate the shock input energy in transient time duration was presented. The theoretical modeling based on the three-dimensional equation of heat transfer through a fluid element was introduced to predict the viscous heating in the fluid damper under shock conditions. A corresponding comprehensive experimental program was conducted on the shock test machine to validate the analytical expression built. The experimental results show that the theoretical model can offer a dependable prediction of the temperature history in the damper with different input velocities.

关 键 词：负冲击波发生器 流体阻尼器 粘性温升 冲击激励 

分 类 号：TK124[动力工程及工程热物理—工程热物理]