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过程中,将移动车辆对桥梁的作用近似为移动常量力和移动简谐力叠加,对桥梁动力响应进行频谱分析并取功率谱第1个主瓣的右谷值为截止频率,相对于截止频率的低频段即为桥梁振动响应中静态分量的频段.通过低通滤波从动力响应中提取相应的静力成分,低通滤波器频响函数H(f)如式(3)所示,其中,fu为低通滤波截止频率.典型的滤波前后桥梁响应时程曲线见图2. 图2 滤波前后桥梁响应曲线 Fig. 2 Bridge....从表1可见:当车辆速度不超过80 km/h时,应用本文方法所得到的桥梁FDA相较理论值最大相对误差为0.1%;采用低通滤波法计算求得的FDA与理论值最大相对误差为-5.24%;采用波峰-波谷法所得FDA最大相对误差达到9.84%,而且一般速度越高,相对误差越大. 图7 不同车速下桥梁动力响应曲线 Fig. 7 Bridge dynamic response curve under......
; 文章编号:1672-7207(2008)01-0202-07 Pushover analysis for continuous rigid frame bridge CHEN Xing-ye, LIU Wen-hao, TANG Xue-song (College of Bridge and Structural Engineering, Changsha University of Science and Technology, Changsha 410076, China) Abstract: The seismic response analysis for a continuous rigid frame bridge was performed by application of the pushover method......
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Preparation of Yttria-doped Zirconia Powder from Molten Salts张昭摘 要:PreparationofYttria-dopedZirconiaPowderfromMoltenSaltsZhangZhao,HudaAL-RaihaniandD.Inman(张昭)(ChengduUniversityofScienceandTec...关键词:......
Interactions of molten salts with cathode products in the FFC Cambridge ProcessGeorge Z.ChenDepartment of Chemical and Environmental Engineering, Faculty of Engineering, University of NottinghamDepartment of Chemical and Environmental Engineering, Faculty of Science and Engineering, University of Nottingham Ningbo China摘 要:Molten salts play multiple......
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Cathodic Process of Ti(Ⅳ) in Molten LiF-NaF石青荣,段淑贞摘 要:CathodicProcessofTi(Ⅳ)inMoltenLiF-NaFShiQingrongandDuanShuzhen石青荣,段淑贞(UniversityofScienceandTechnologyBeijing,Beijing100083,C...关键词:......
Electrochemical Reduction of Niobium lons in Molten NaF-CaF2方百增,刘新宇,王新东,段淑贞摘 要:ElectrochemicalReductionofNiobiumlonsinMoltenNaF-CaF_2.FangBaizeng;LiuXinyu;WangXindongandDuanShuzhen方百增(刘新宇)(王新东)(段淑贞)(Unive...关键词:......
Electrochemical Study on Formation of Dy-Ni Alloy in Molten Chlorides童叶翔,刘冠昆,杨绮琴,洪惠婵,陈胜洋,甘罗摘 要:ElectrochemicalStudyonFormationofDy-NiAlloyinMoltenChloridesTongYexiang;LiuGuankun;YangQiqin;HongHuichan,(童叶翔)(刘冠昆)(杨绮琴)(洪惠婵)...关键词:......