流风
3.A 3-D baroclinic ocean model is used to examine the influence of tide, offshore wind and upwelling-favorable wind on the river plume development.
4.The section of turbulence wind field discusses the relations among the discrete random series ,the power spectrum and the Fourier spectrum in the random theory, introduces several representative and commonly used velocity power density spectrums such as Harris spectrum 、 Kaimal spectrum、 Von Karman spectrum etc.
5.Environment excitation-based methods are effective ones to identify flutter derivatives of bridges in turbulent wind field.
6.Results show that using bin to bin automatic gain control(AGC),clutter filtering,and suitable antenna tilt management,the “wet” microburst windshear can be accurately detected 80s(approximately 6km) in front of the aircraft,meeting the certification requirements proposed by FAA.
7.The result obtained showed that it was 1.38 times faster than the speed of natural wind where impeller installed, compared with modelⅠthe value increased 5.3%. Flux energy became 2.63 times of the natural wind in same area, 16.9% higher than modelⅠ.
8.Abstract: Based on thestatic wind force factors of a tower and on the root-mean-square of the buffetingdisplacement responses of the tower top, which are measured by wind tunnel tests inlaminar and turbulent field respectively, the static and buffeting internal forces of thetower bottom control sections under its design wind speed are obtained by linearsuperposition method and FEM.
9.The relations among the discrete random series,the power spectrum and the fourier spectrum in the random theory were discussed,and several representative and commonly used velocity power density spectrums such as Harris spectrum,Karmal spectrum,Von Karman spectnan,etc.
