新型空心管屏障隔振效果对比数值研究  

Comparative Numerical Study of Vibration Isolation Effect of New Hollow Pipe Barriers

作　　者：胡中华 徐长节[2] 柳伟[1] 朱怀龙 HU Zhonghua;XU Changjie;LIU Wei;ZHU Huailong(Jiangxi Vocational and Technical College of Communications,Nanchang 330013,China;College of Civil Engineering and Architecture,East China Jiaotong University,Nanchang 330013,China)

机构地区：[1]江西交通职业技术学院建筑工程学院,南昌330013 [2]华东交通大学土木建筑学院,南昌330013

出　　处：《噪声与振动控制》2024年第5期218-223,共6页Noise and Vibration Control

基　　金：国家自然科学基金资助项目(52208344);江西省教育厅科技资助项目(GJJ2205202);江西省交通厅科技资助项目(2021H0037)。

摘　　要：为研究新型空心管屏障在工程隔振中的应用价值及对其影响因素进行分析,基于Plaxis3D有限元分析软件,依照已有的模型和现场试验参数建立有限元模型,并采用经过验证的有限元模型进行仿真计算。基于有限元数值分析方法,开展新型空心管隔振效果与已有模型和现场试验中屏障的对比研究;分析单根空心管高度和空心管数量对新型空心管隔振效果的影响。研究发现:新型空心管屏障平均减振系数比填充沟、排桩和波阻板小得多,彼此之间平均减振系数偏差最大可达373%,而与空沟的平均减振系数偏差较小。这一结果表明:新型空心管的隔振效果明显要优于填充沟、排桩和波阻板,而与空沟的隔振效果相接近。此外,还发现在不同的工程条件下,新型空心管隔振屏障的平均减振系数大都在0.3以下,具有很好的隔振效果;且随着空心管数量的增加,空心管的隔振效果也随之提升;在空心管总高度不变的条件下,调节单根空心管的高度对屏障的隔振效果影响很小。To study the application value of a new type of hollow pipe barriers in engineering isolation and analyze its influencing factors,a finite element model was established based on the Plaxis 3D software according to the existing model and field test parameters.The model was validated using original test data,and then simulated calculations were performed on the verified finite element model.Based on finite element numerical analysis methods,the isolation effect of the new hol-low pipe was compared with the barrier used in the original model and field trials.Also,the impact of the height of a single hollow pipe and the number of hollow pipes on the isolation effect of the new hollow pipe was analyzed.The results show that the average damping coefficient of the hollow pipe is much smaller than that of the filling trench,row of pile,and wave impeding blocks.The deviation between their average damping coefficients can reach up to 373%,while the deviation of the average damping coefficient between the new hollow pipe and the empty trench is relatively small.It indicates that the isolation effect of the new hollow pipe is significantly better than that of the filling trench,row of piles,and wave impeding blocks,but is close to the isolation effect of the empty trench.In addition,it is found that under different engineering condi-tions,the average damping coefficients of the new hollow pipe barriers is mostly below 0.3,so they have a good isolation ef-fect.As the number of hollow pipes increases,the isolation effect of the barrier also improves.Adjusting the height of a sin-gle hollow pipe has little influence on the isolation effect of the barrier when the height of the other hollow pipes remains unchanging.

关 键 词：振动与波 水平空心管 空沟 排桩 隔振效果对比 

分 类 号：X593[环境科学与工程—环境工程]