Shallow water sloshing load characteristics and approximate calculation method
Here,high-precision Boussinesq equation was adopted to establish a numerical model,combine experimental means,and deeply analyze load characteristics of shallow water sloshing motion inside a rectangular water tank.The study results showed that when dimensionless external excitation frequency approaches natural frequency of water sloshing,sloshing motion and load time history curves exhibit similar nonlinear characteristics,and present various different forms with increase in excitation frequency.By performing Fourier analysis for load time history curve,load frequency domain distribution characteristics under different external excitation frequencies were obtained.Based on similarity between sloshing load and free liquid surface wave height frequency response curves as well as analysis results of load characteristics,an approximate calculation method for sloshing load was established.It was shown that this method can exhibit excellent generalization performance under different water depths and excitation amplitudes,and correct the overestimation of linear approximation wall surface load under resonance state to reduce the error at jump frequency by more than 50％;the proposed approximation method can quickly estimate wall surface load under known wave height to provide a technical support for engineering design.
shallow water sloshingload characteristicsapproximation methodmodel experiments
万方数据
维普
