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Parametric Vibration and Vibration Reduction of Cables in Cable-stayed Space Latticed Structure
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作者 包艳 周岱 柳杰 《Journal of Shanghai Jiaotong university(Science)》 EI 2008年第2期145-149,共5页
Mechanical model and vibration equation of a cable in cable-stayed space latticed structure (CSLS) under external axial excitation were founded.Determination of the mass lumps and natural frequencies sup- plied by the... Mechanical model and vibration equation of a cable in cable-stayed space latticed structure (CSLS) under external axial excitation were founded.Determination of the mass lumps and natural frequencies sup- plied by the space latticed structure (SLS) was analyzed.Multiple scales method (MSM) was introduced to analyze the characteristics of cable's parametric vibration,and the precise time-integration method (PTIM) was used to solve vibration equation.The vibration behavior of a cable is closely relative to the frequency ratio of the cable and SLS.The cable's parametric vibration caused by the external axial excitation easily occurs if the frequency ratio of the cable and SLS is in a certain range,and the cable's vibration amplitude varies greatly even if the initial disturbance supplied by SLS changes a little.Furthermore,the mechanical model and vibration equation of the composite cable system consisting of main cables and assistant cables were studied. The parametric analysis such as the pre-tension level and arrangement of the assistant cables was carried out. Due to the assistant cables,the single-cable vibration mode can be transferred to the global vibration mode, and the stiffness and damping of the cable system are enhanced.The natural frequencies of the composite cable system with the curve line arrangement of assistant cables are higher than those with the straight-line arrangement and the former is more effective than the latter on the cable's vibration suppression. 展开更多
关键词 cable parametric vibration composite cable system axial excitation vibration suppression
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Converged Communication Technology and Application in Intelligent Dual-Interactive Power System
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作者 j.y. Wang N. Li +3 位作者 Y. Fu H.J. Sun B. Tong L. Zhang 《Journal of Energy and Power Engineering》 2011年第12期1213-1218,共6页
Acknowledgments Thanks for assistance and support, which is provided by State Grid Corporation of China and State Grid Communication Information & Telecommunication Company, for the project in the process of researc... Acknowledgments Thanks for assistance and support, which is provided by State Grid Corporation of China and State Grid Communication Information & Telecommunication Company, for the project in the process of research and development. Fibrlink Communications Co., Ltd will keep exerting itself to innovating, which aims for making more contribution of the smart grid on energy reduction and environment protection. 展开更多
关键词 Converged communication optical fiber composite low-voltage cable power line communication micro-power wireless communication.
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