螺栓预紧力对交叉滚子导轨副振动特性影响的实验研究  

Experimental research on the influence of bolt preload on vibration characteristics of cross roller guide pair

作　　者：高梁 彭旸 魏珅[2] 邓华夏[1] 王宇[1] 龚兴龙[1] GAO Liang;PENG Yang;WEI Shen;DENG Huaxia;WANG Yu;GONG Xinglong(CAS Key Laboratory of Mechanical Behavior and Design of Materials,Department of Modern Mechanics,University of Science and Technology of China,Hefei 230027,Anhui,China;National Synchrotron Radiation Laboratory,University of Science and Technology ofChina,Hefei230027,Anhui,China)

机构地区：[1]中国科学技术大学近代力学系中国科学院材料力学行为与设计重点实验室,安徽合肥230027 [2]中国科学技术大学国家同步辐射实验室,安徽合肥230027

出　　处：《实验力学》2023年第6期696-703,共8页Journal of Experimental Mechanics

基　　金：国家自然科学基金项目(12372187);同步辐射联合基金项目(KY2090000097)。

摘　　要：为了探究交叉滚子导轨间隙螺栓预紧力对双晶单色器关键部件交叉滚子导轨副振动特性的影响规律,开展了不同预紧力下交叉滚子导轨副的正弦扫频试验和随机振动试验,对其振动响应特征进行研究,得到了预紧力对扫频共振峰和低频的振动传递系数的影响规律。此外,本文在对结构进行仿真分析时建立了表征螺栓预紧效果的简化模型,对交叉滚子导轨副的动力学特性参数进行了模型表征。结果表明:交叉滚子导轨副的共振频率随着螺栓预紧力增大而逐渐升高,最终趋于稳定;导轨在低螺栓预紧力情况下存在低频的振动稳定性问题,一定的预紧力可以抑制低频振动失稳所诱发的振动放大现象。In order to investigate the effect of the bolt preload on the vibration characteristics of the cross roller guide pair,a key component of the double-crystal monochromator, the sweep frequency vibration test and random vibration test of the cross roller guide pair under variable preloads were carried out. The vibration response characteristics were analyzed. The influence of the preload on vibration transmissibility at low frequency and the resonant peak were discussed. A simplified model was established to characterize the preload effect of bolts, and the dynamic characteristic parameters of cross roller guide pairs were presented. The results show that the resonance frequency of the cross roller guide pair increases gradually with the increase of bolt preload before it tends to a plateau finally. Under the condition of low bolt preload, there is a problem of vibration stability at low frequency. A certain preload can restrain the vibration amplification induced by the instability at low frequency vibration.

关 键 词：螺栓预紧力 导轨副 振动特性 

分 类 号：TB53[理学—物理]