湍流风速谱有效模态的POD分析法.pdf

３６ ６ Vol ．３６ No ．６ ２０１４ １２ Journal of Civil ，A rchitectural Environmental Engineering Dec ．２０１４ doi ：１０ ．１１８３５／ ．issn ．１６７４‐４７６４ ．２０１４ ．０６ ．００３ j P OD （，５１５０６３） ：，。 ，， （Proper Orthogonal Decomposition ）。 。 ，。 ：；；；； ：T U ３７５.１ ：A ：１６７４‐４７６４（２０１４）０６‐００１４‐０８ Turbulent Wind Velocity Spectrum Analysis Approach Based on Proper Orthogonal Decomposition Liu Zhe （Collage of Engineering ，Shantou U niversity ，Shantou ５１５０６３ ，Guangdong ，P ．R ．China ） Abstract ：T he emergence of large‐span bridge and ex treme w eather attract much more attention of researchers on the bridge buff eting problem ．One of the most important f actors that aff ect bridge buff eting response is w ind velocity spectrum ．In the precious investigations ，w ind velocity of various f requency has impact on the bridge buff eting response ． While Proper Orthogonal Decompo sition （POD ）method is propo sed to decompo se the w ind velocity to solve the above problem and a cable ‐stay ed bridge w as used to investigate the contribution of eff ective model to bridge buff eting response ．T he result show ed that not all f requency ranges of w ind velocity spectrum contributed to the response w hich had relationship w ith both structural self ‐vibration mode and turbulence eff ective mode coefficient ． Key words ：Proper Orthogonal Decompo sition ； buff eting response ； turbulence ； eff ective mode ； w ind velocity spectrum （T acoma Narrow s Bridge ） ；Scanlan［２］ ， ； ［３］ ， Jain ； ［４ ］ 、