RANDOM　CHARACTERISTICS　OF　FLOW　FLUCTUATING　PRESSURE　AND　DYNAMIC　RESPONSE　ON　THE　SHAFT　SPILLWAY  

作　　者：Cui Li(Dalian University of Technology, Dalian 116023, P. R. China) 

出　　处：《Journal of Hydrodynamics》1995年第2期28-34,共7页水动力学研究与进展B辑（英文版）

摘　　要：The flow down a shaft spillway, connected with tunnel, results in nonsymmetric vortex around the axis of the shaft. The greater the nonsymmetry, the greater the pressure fluctuation and random vibration of structures.This paper deals with an attempt to determine the fluctuating pressure characteristics in the shaft. Stochastic theory and random time series are employed to analyse the sample function x(t) , its x(t) and x(t), and their correlations:The moments of the spectra are obtained:The fluctuating pressure characteristics are related to the non-symmetric inlet vortex. The relation between the point pressure spectra and fluctuating pressures on the shaft wall are indicated and discussed.This paper gas further into the simulated test on the framed over-flow tower and puts forward an effective proposed way. Besides the calculation in frequency domain, computation in time domain is also ueed to analyse the same structure. The vibration source and the method to remove it are found out.The flow down a shaft spillway, connected with tunnel, results in nonsymmetric vortex around the axis of the shaft. The greater the nonsymmetry, the greater the pressure fluctuation and random vibration of structures.This paper deals with an attempt to determine the fluctuating pressure characteristics in the shaft. Stochastic theory and random time series are employed to analyse the sample function x(t) , its x(t) and x(t), and their correlations:The moments of the spectra are obtained:The fluctuating pressure characteristics are related to the non-symmetric inlet vortex. The relation between the point pressure spectra and fluctuating pressures on the shaft wall are indicated and discussed.This paper gas further into the simulated test on the framed over-flow tower and puts forward an effective proposed way. Besides the calculation in frequency domain, computation in time domain is also ueed to analyse the same structure. The vibration source and the method to remove it are found out.

关 键 词：shaft spillway dynamic response random characteristics 

分 类 号：O353.3[理学—流体力学]