地铁邻近高层住宅建筑振动分布规律及影响因素研究  

Distribution Law and Influencing Factors of Vibrations inside High-rise Residential Buildings Adjacent to Subway

作　　者：曾钦娥 何蕾 邬玉斌 宋瑞祥 户文成 ZENG Qin'e;HE Lei;WU Yubin;SONG Ruixiang;HU Wencheng(Institute of Urban Safety and Environmental Science,Beijing Academy of Science and Technology,Beijing 100054,China)

机构地区：[1]北京市科学技术研究院城市安全与环境科学研究所,北京100054

出　　处：《噪声与振动控制》2024年第6期242-248,共7页Noise and Vibration Control

基　　金：北京市科学技术研究院青年学者资助项目(YS202102);北京市自然科学基金资助项目(8232024)。

摘　　要：通过有限元法建立轨道-隧道-土体-建筑大型精细化有限元模型,考虑轮轨激励的频率特性,结合源强原位测试验证模型的可靠性,在此基础上,系统研究建筑不同房间、楼板不同位置、不同楼层的振动分布规律,结合楼板的模态分析,重点研究不同房间振动水平差异的形成原因。结果表明,同一楼层不同房间振动差异受楼板一阶固有频率与输入源强卓越频率重叠关系影响,不同房间的振动水平仿真结果差异达到15.1 dB;当房间楼板一阶固有频率远低于源强卓越频率时,房间楼板振动极值点出现在房间楼板中央以外的位置,反之则出现在楼板中央;振动随楼层高度的增加表现为波动变化规律,不同房间的最大值可能出现的位置为首层、中间层或顶层。A large-scale refined numerical model including track,tunnel,soil and building was established based on finite element method.Considering the frequency characteristics of wheel/rail excitation,the numerical model was validated by the in-situ test of the vibration source intensity.Based on this model,a systematic study on vibration variation in different rooms,different locations of floor slabs,and different stories were conducted.Combined with modal analysis of different rooms'floors,the causes of the vibration difference in different rooms were studied emphatically.The results show that vibration in different rooms on the same story is influenced by the overlap relationship between the first-order natural frequency of the floor and the dominant frequency of the input source.The simulation vibration levels in different rooms show a difference of 15.1 dB.When first-order natural frequency of the floor is much lower than the dominant frequency of the source,the extreme vibration point of the floor slab appears outside the center of the floor slab,or otherwise,it appears in the center of the floor slab.The vibration fluctuation increases with the increase of the stories,and the story location where the maximum value appears may be in the first story,the middle story,and the top story.

关 键 词：振动与波 地铁 住宅建筑 室内振动 楼板固有频率 

分 类 号：U231[交通运输工程—道路与铁道工程] TB533[理学—物理]