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Harada, Takehiko,Yoshimura, Takeshi,Tanaka, Takahisa,Mizuta, Yoji,Hashiguchi, Takafumi,Sudo, Makoto,Miyazaki, Masao Techno-Press 2004 Wind and Structures, An International Journal (WAS Vol.7 No.1
A method of numerical analysis without conducting 3D wind tunnel model tests was examined in our previous study for predicting vortex-induced oscillation of bridge girders with span-wise varying geometry. The aerodynamic damping forces measured for plural wind tunnel 2D models were used in the analysis. A further study was conducted to examine the precision of solution obtained by this method. First, the responses of vortex-induced oscillation of two rocking models and a taut-strip bridge girder model with span-wise varying geometry were measured. Next, the responses of these models were numerically analyzed by means of this method, and then a comparison was made between the obtained $Vr-A-{\delta}_a$ contour diagram of each 3D model in the wind tunnel test and the diagram in the numerical analysis. Since close correlations were observed between each two $Vr-A-{\delta}_a$diagrams obtained in the model test and in the analysis in cases where the 3D model did not have strong three-dimensionality, our findings revealed that the predicted solution proved to be reasonably accurate.
Recent Trends in Elevator Group Control Systems
Sandor Markon,Ken’ichi Aoki,Masami Nakagawa,Takeshi Sudo 대한전자공학회 2008 ITC-CSCC :International Technical Conference on Ci Vol.2008 No.7
The latest elevator systems have structural differences from traditional systems, such as the use of destination calls, or multiple cars in the same hoistway. This requires the development of new elevator group control systems, which is best done by adopting modern soft-computing methods. We review some of these systems and the results of research so far, and suggest further directions of research.