摘要
中南剧场作为第八届中国艺术节演出场地之一,对剧场声环境有较高的要求。环评报告指出:轨道交通引起的剧场内的结构噪声不满足噪声评价曲线NR-25小于30 dB(A)的规定。使用线性回归分析方法,得到了拟建场地环境振动的振级衰减回归曲线,使用Ansys有限元软件对拟建场地的环境振动进行了三维有限元数值模拟,利用桥墩处的振动数据作为输入载荷,模拟结果的振动衰减规律与实测结果相同,证明模型是可靠的。根据工程实际情况,分别建立了三种减振隔振措施的有限元模型。数值计算结果表明,连续墙加减振材料的隔振效果较好。
As one of the arenas of the Eighth China Art Festival, Zhongnan Theater is of stringent stipulation in the respect of acoustic environment. It was shown in the environmental evaluation report that structural noise in the theater induced by rail transit exceeded 30 dB（A）, which didn＇t satisfy the noise evaluation curve NR-25. The attenuation formula of environmental vibration in the field of Zhongnan Theater was derived by the linear regression method. Numerical simulation of environmental vibration around the projected field was carried out by Ansys three-dimensional FEM program, in which the exciting force was input from the vibration data measured at the foot of the pier. That the simulation results were consistent with the measured data indicated the reliability of the numerical model. According to the practice, three kinds of vibration isolation models were established. And it was indicated by the simulation results that the effect of combination of continual walls and vibration alleviation materials was satisfactory.
出处
《岩土工程学报》
EI
CAS
CSCD
北大核心
2007年第11期1720-1725,共6页
Chinese Journal of Geotechnical Engineering
关键词
轨道交通
振动
隔振
rail transit
vibration
vibration isolation
