中国铁道科学2018，Vol.39Issue(1)：31-38,8.DOI:10.3969/j.issn.1001-4632.2018.01.05
沪通长江大桥主桥风—车—桥动力响应研究
Research on Wind-Train-Bridge Dynamic Response of Main Bridge of Shanghai-Nantong Yangtze River Bridge
摘要
Abstract
Taking the track irregularity as the internal excitation of the system and the wind load as the external excitation,considering the static and pulsating wind forces,the self-compiled software program TYWTB was used to build the dynamics model of train-bridge coupled system.The system dynamic responses when train passing bridges at different speeds under the excitations of different wind speeds were analyzed.The safety and comfort of the train were evaluated.Results show that,with the increase of wind speed,the dynamic response of train-bridge system increases,both the maximum vertical deflection and the lateral displacement of mid-span appear windings on train running side.With the increase of train speed,the dynamic response of train-bridge system increases,the safety and comfort of the train on bridge decreases with the increase of train speed.When the wind speed is equal to or less than 25 m · s-1,the dynamic response of train travelling at 160～250 km · h 1 does not exceed the limit.When the wind speed reaches 30 m · s-1,the lateral acceleration of motor car travelling at 160～250 km · h-1 is beyond the limit.The wheel load reduction rate of trailer car travelling at 250 km · h-1 exceeds the limit and the driving safety cannot be guaranteed.Since the wind-affected surface of the train is blocked by the Shanghai-Nantong Yangtze River Bridge,the average wind speed reaching 25 m · s1 can still ensure the running safety and ride comfort,which meets the relevant requirements of "Railway Technology Management Regulations".Moreover,steel box structure is adopted for the deck of the Shanghai-Nantong Yangtze River Bridge to enhance the vertical,lateral stiffness and torsional stiffness,making the overall performance of the bridge good under the combined action of wind field and train.关键词
大跨度斜拉桥/沪通长江大桥/风—车—桥耦合系统/动力响应/风载荷/安全性/舒适性Key words
Long-span cable-stayed bridge/Shanghai-Nantong Yangtze River bridge/Wind-train-bridge coupled system/Dynamic response/Wind load/Safety/Comfort引用本文复制引用
张骞,高芒芒,于梦阁,方兴,马莉,李红梅..沪通长江大桥主桥风—车—桥动力响应研究[J].中国铁道科学,2018,39(1):31-38,8.基金项目
国家自然科学基金资助项目(51705267) （51705267）
中国铁路总公司科技开发计划项目(2015G007-A) （2015G007-A）
