摘要
换热器管子的挤压膜阻尼与中间支承的几何参数以及管子与中间支承之间的动态相互作用有关。为研究中间支承的几何参数对挤压膜阻尼的影响,作者在具有中间支承的两跨试验装置上作了较系统的实验研究。本文主要研究管子在支承中作横向运动时的挤压膜阻尼。实验研究表明:支承厚度、直径间隙等几何参数对挤压膜阻尼均有明显的影响,而管子相对于支承板上圆孔的偏心率也是一个很重要的影响因素。在分析实验结果的基础上,讨论了计算挤压膜阻尼的半经验公式。
Squeeze-film damping is related to support prameters and dynamic interaction between the tube
and the support.Systematic experiments are carried out on a two-span tube with one nitermediate sup-
port to investigate the effects of support parameters on squeeze-film damping.This paper studies only
the support damping of two-span tube due to lateral motion.Experimental results show that sup-port
thickness and diametral clearance have an apparent effect on the squeeze-film damping.Eccen-tricity
of the tube within the tube support has a very important effect.A semi-empirical expression to formu-
late squeeze-film damping is discussed in light of the analysis of experimental results.
出处
《西安交通大学学报》
EI
CAS
CSCD
北大核心
1992年第3期107-114,72,共9页
Journal of Xi'an Jiaotong University
基金
"七五"国家科技重点攻关项目
关键词
传热管
流体
振动
支承
阻尼
support
damping
squeeze-film
eccentricity
