In this paper,we study the water-wave flow under a floating body of an incident wave in a fluid.This model simulates the phenomenon of waves abording a floating ship in a vast ocean.The same model,also simulates the p...In this paper,we study the water-wave flow under a floating body of an incident wave in a fluid.This model simulates the phenomenon of waves abording a floating ship in a vast ocean.The same model,also simulates the phenomenon of fluid-structure interaction of a large ice sheet in waves.According to this method.We divide the region of the problem into three subregions.Solutions,satisfying the equation in the fluid mass and a part of the boundary conditions in each subregion,are given.We obtain such solutions as infinite series including unknown coefficients.We consider a limited number only of the coefficients by truncating the infinite series and satisfy the remaining boundary conditions approximately.Numerical experiments show that the results are acceptable.Tables are given along with the graph of the system of the resulting streamlines and the dynamical pressure acting on the obstacle.The drawn system of streamlines shows the correctness of the solution and the pressure is maximum on the side facing the upstream extremity of the channel.The same procedure can be adequately applied for problems with more complicated geometry and other phenomenon can thus be simulated.展开更多
This paper studies optimization of three design parameters （mass ratio, frequency ratio and damping ratio） of multiple tuned mass dampers MTMDs that are applied in a cable stayed bridge excited by a strong wind usin...This paper studies optimization of three design parameters （mass ratio, frequency ratio and damping ratio） of multiple tuned mass dampers MTMDs that are applied in a cable stayed bridge excited by a strong wind using minimax optimization technique. ABAQUS finite element program is utilized to run numerical simulations with the support of MATLAB codes and Fast Fourier Transform FFT technique. The optimum values of these three parameters are validated with two benchmarks from the literature, first with Wang and coauthors and then with Lin and coauthors. The validation procedure detected a good agreement between the results. Box-Behnken experimental method is dedicated to formulate the surrogate models to represent the control efficiency of the vertical and torsional vibrations. Sobol＇s sensitivity indices are calculated for the design parameters in addition to their interaction orders. The optimization results revealed better performance of the MTMDs in controlling the vertical and the torsional vibrations for higher mode shapes. Furthermore, the calculated rational effects of each design parameter facilitate to increase the control efficiency of the MTMDs in conjunction with the support of the surrogate models.展开更多
文摘In this paper,we study the water-wave flow under a floating body of an incident wave in a fluid.This model simulates the phenomenon of waves abording a floating ship in a vast ocean.The same model,also simulates the phenomenon of fluid-structure interaction of a large ice sheet in waves.According to this method.We divide the region of the problem into three subregions.Solutions,satisfying the equation in the fluid mass and a part of the boundary conditions in each subregion,are given.We obtain such solutions as infinite series including unknown coefficients.We consider a limited number only of the coefficients by truncating the infinite series and satisfy the remaining boundary conditions approximately.Numerical experiments show that the results are acceptable.Tables are given along with the graph of the system of the resulting streamlines and the dynamical pressure acting on the obstacle.The drawn system of streamlines shows the correctness of the solution and the pressure is maximum on the side facing the upstream extremity of the channel.The same procedure can be adequately applied for problems with more complicated geometry and other phenomenon can thus be simulated.
文摘This paper studies optimization of three design parameters （mass ratio, frequency ratio and damping ratio） of multiple tuned mass dampers MTMDs that are applied in a cable stayed bridge excited by a strong wind using minimax optimization technique. ABAQUS finite element program is utilized to run numerical simulations with the support of MATLAB codes and Fast Fourier Transform FFT technique. The optimum values of these three parameters are validated with two benchmarks from the literature, first with Wang and coauthors and then with Lin and coauthors. The validation procedure detected a good agreement between the results. Box-Behnken experimental method is dedicated to formulate the surrogate models to represent the control efficiency of the vertical and torsional vibrations. Sobol＇s sensitivity indices are calculated for the design parameters in addition to their interaction orders. The optimization results revealed better performance of the MTMDs in controlling the vertical and the torsional vibrations for higher mode shapes. Furthermore, the calculated rational effects of each design parameter facilitate to increase the control efficiency of the MTMDs in conjunction with the support of the surrogate models.
