摘要
以传热学理论为基础,解释了一维杆传热的热弹性现象,研究了滚珠丝杠受周期变化端热源影响而产生的温度响应及变化特性.通过有限元软件对变化热源作用下滚珠丝杠的温度场和热变形进行了建模和仿真,解释了温度响应的幅值衰减特性及相位变化特性,说明了滚珠丝杠末端热变形与不同测点温度值变化之间的"超前性"和"滞后性",进一步阐述了滚珠丝杠在周期热源作用下的热动态特性.
The phenomenon of thermal elasticity is brought out by heat source changing alternately which is acting on an object. On the basis of theory of heat transfer, the thermal elasticity phenomenon of the heat transfer in one dimension stick is explained. Temperature responding and changing characteristics of ball-screw are studied when it is influenced by periodic endmost heat source. By simulating and modeling of finite element software on temperature and thermal deformation of ball-screw under variational heat source, the correctness of academic result is well validated. The characteristics of amplitude attenuation and phase changing are made clear. Also, the nature of lead and lag, between thermal deformation of ball-screw tail and the temperature on the different testing point, are illuminated. Further, the thermal dynamic characteristic of ball-screw under periodic heat source is illuminated.
出处
《华中科技大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2008年第3期1-4,共4页
Journal of Huazhong University of Science and Technology(Natural Science Edition)
基金
国家重点基础研究发展计划资助项目(2005CB724101)
国家自然科学基金资助项目(50575087
50675076)
关键词
滚珠丝杠
热弹性
热动态特性
有限元仿真
ball-screw
thermal elasticity
thermal dynamic characteristic
finite element simulating
