顶部有集中质量的圆柱体在流场中振动的谱分析与试验研究  

THE SPECTRAL ANALYSIS AND TEST OF THE VIBRATION OF COLUMNS WITH A LUMP OF MASS ON TOP IN FLOW FIELD

作　　者：张绍文[1] 

机构地区：[1]苏州城建环保学院城建系

出　　处：《苏州城建环保学院学报》1996年第3期34-42,共9页Journal of Suzhou Institute of Urban Construction and Environmental Protection

摘　　要：本文对海洋工程中独柱平台模型──顶部有集中质块圆柱结构在涡流场中振动的荷载及反应谱进行了理论分析和试验研究。通过把流体动力荷载分解为耦合弹性力、卡门涡脱力、紊流脉动力及壅水、迥流、空化所致随机振动力，求出对应各荷载的广义功率语后迭加。再由推导的谱传递函数，将分析和实测的荷载（或反应）谱相互印证，表明预报涡流场中柱体振动的“组合荷载模型”是可行的。文末给出实测荷载谱的标准化方程。This paper studies in theory and test the load and response spectrum of column structure (which is a model of single column platform) vibrating in flow field with vortex. The method is to divide fluid loads into water elastic force, vortex shedding force, turbulence force and random vibration force due to water congestion, bubble collapse and roundabout flow.After the board souse power spectrum being gotten of all of the above loads,the calculative results (load or response spectrum) arc compared with tested ones through transfer functions deduced. The agreement between them shows that the “combination loads model” is reliable for forecasting the vibratian of column strueture in flow field with vortex. In the end, the normal equation is given of load spectrum tested.

关 键 词：流体动力学 悬臂柱 荷载 结构动力学 流场 

分 类 号：O351.2[理学—流体力学] TV312[理学—力学]