基于试验的单摆流固耦合作用分析  

Fluid-structure interaction study of the single pendulum based on experiments

作　　者：马跃 张安琪 王山水 刘平[1] MA Yue;ZHANG Anqi;WANG Shanshui;LIU Ping(School of Civil Engineering and Architecture,Jiangsu University of Science and Technology,Zhenjiang 212100,China)

机构地区：[1]江苏科技大学,土木工程与建筑学院,镇江212100

出　　处：《江苏科技大学学报（自然科学版）》2023年第1期98-102,共5页Journal of Jiangsu University of Science and Technology:Natural Science Edition

基　　金：国家自然科学基金资助项目(51508238);江苏省博士后科研资助项目(1601014B)。

摘　　要：为了研究结构振动时空气作用力的特征与规律,设计考虑空气作用的单摆试验.测量不同摆球半径、不同摆球质量及不同摆线长度共9种工况下的单摆位移时程曲线,通过分析单摆位移随时间的递减规律,从而计算出单摆所受空气阻力大小.对阻力值采取两种理论计算方法-即线性阻尼(一次阻尼)与Bernoulli阻尼(二次阻尼).结合单摆的运动方程,给出了理论求解方法.通过与试验结果对比得出结论:两种阻尼方法预测与试验结果均比较接近,但是线性阻尼方法准确性更高;线性阻尼比大小与摆球面积成正比、与摆球质量成反比,而二次阻尼比大小与摆球面积成正比,与摆球质量规律不明显.To obtain the characteristics and laws of air effect with the structure vibrating in the air flow,some pendulum experiments were carried out.The displacement of the pendulum withparameters of different radius,weight,and cycloid length was measured via laser displacement meter.As for theoretical analysis,two damping rules including linear damping and Bernoulli damping were taken into account.Comparing with experiments we have done,we draw the following conclusion.The linear damping is more accurate although both damping can predict the result.The linear damping ratio is proportional to the cross area of the pendulum and inversely proportional to the mass of the pendulum,while the ratio of the Bernoulli damping is proportional to the cross area of pendulum.

关 键 词：风阻力 阻尼比 非定常风荷载 单摆试验 

分 类 号：O314[理学—一般力学与力学基础]