钢弹簧浮置板隔振道路的模态分析  

A Modal Analysis of Vibration Isolation Road with Steel Spring Floating Slab

作　　者：邹锦华[1] 陈伟[2] 黄龙田[2] 陈海斌[2] 李碧坤 蔡仕晨 Zou Jin-hua;Chen Wei;Huang Long-tian;Chen Hai-bin;Li Bi-kun;Cai Shi-cheng(School of Civil and Transportation Engineering,Guangdong University of Technology,Guangzhou 510006,China;Guangdong Institute of Architectural Design,Guangzhou 510010,China)

机构地区：[1]广东工业大学土木与交通工程学院,广东广州510006 [2]广东省建筑设计研究院,广东广州510010

出　　处：《广东工业大学学报》2020年第1期53-57,共5页Journal of Guangdong University of Technology

基　　金：广东省科技计划项目(2015B090901054);广东省交通运输厅科技项目(科技-2017-02-013)

摘　　要：为了减小道路交通汽车荷载对广州市番禺万博商务中心地下空间结构产生的低频振动影响,研发一种新型的钢弹簧浮置板隔振道路。应用ANSYS软件分别建立钢弹簧浮置板、地下空间、浮置板和地下空间结构的三维有限元模型,对这3种不同结构进行模态分析,并进一步研究了传导比。结果表明:设计的浮置板道路基频为8.69 Hz;地下空间基频为15.69 Hz;浮置板与地下空间整体结构基频为7.33 Hz;从振型上看,低频时主要体现为浮置板的振动,中高频时主要为地下空间结构顶板的振动;3种结构的传导比峰值均出现在第一阶固有频率附近,地下空间结构在增加钢弹簧浮置板后传导比最大为0.878。钢弹簧浮置板道路可起到良好的隔振效果。In order to reduce the impact of road traffic load on the low-frequency vibration of the underground space structure of the Panyu Wanbo Business Center in Guangzhou, a new type of vibration isolation road with steel spring floating slab was developed. 3-D finite element models of steel spring floating slab, underground space,floating slab and underground space structure were established by using ANSYS software. A modal analysis of these three different structures was carried out, and transmission ratio further studied. The results showed that: the fundamental frequency of floating slab road is 8.69 Hz;the fundamental frequency of the underground space is15.69 Hz;the fundamental frequency of the floating slab and underground space structure is 7.33 Hz;the vibration modal of floating slab was mainly in the form of low frequency, and the vibration modal of roof in the underground space mainly in the form of medium and high frequency;the peak value of transmission ratio of the three structures occurred near the first natural frequency, and the ground frequency was mainly in the form of vibration. The maximum transmission ratio of the lower space structure was 0.878 when the steel spring floating slab was added.Steel spring floating slab road had good effects of vibration reduction and isolation.

关 键 词：交通荷载 钢弹簧浮置板 模态分析 传导比 隔振 

分 类 号：U213[交通运输工程—道路与铁道工程]