环形沟槽几何参数对隔振区域影响的试验研究

摘要
图/表
参考文献(20)
相关文章 (2)

全文: PDF (1722 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要为了研究环形沟槽深度、宽度及其振源距离等几何参数对隔振区域的影响，通过进行环形沟槽隔振的室外试验，绘制振幅降低比的等值线图，以振幅降低比不大于0.35的区域作为有效隔振区域的评价指标，将上述几何参数对有效隔振区域的影响进行分析。结果表明：环形沟槽的深度、宽度、振源距离及其圆心角均会对有效隔振区域产生不同程度的影响。沟槽深度与瑞利波波长的比值为0.54~0.77、沟槽宽度与瑞利波波长的比值为0.23~0.33、振源距离与瑞利波波长的比值为1.18~1.52时，环形沟槽可以取得良好的有效隔振区域面积；在本试验条件下继续增大各参数的比值对增大有效隔振区域无益。环形沟槽圆心角是影响有效隔振区域面积的重要因素，增大圆心角可显著增大有效隔振区域的面积；沟槽圆心角为90º时，隔振区域内将形成不连续的有效隔振区域；沟槽圆心角选取与频率有关，达到同等大小的有效隔振区域，沟槽圆心角随频率的减小而增大。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章
	刘晶磊1
	2
	于川情1
	2
	刘杰1
	2

关键词 ：室外试验, 环形沟槽, 隔振区域, 几何参数

Abstract：In order to study influences of geometric parameters such as depth, width, and distance of an annular trench on a vibration isolation area, an outdoor test of the annular trench was carried out, and the contour map of the amplitude reduction ratio was drawn.The area with the amplitude reduction ratio of not more than 0.35 was used as the evaluation index of the effective vibration isolation area, and the influence of the above geometric parameters on the effective vibration isolation area was analyzed.The results show that the depth of the trench, width of the trench, the distance from trench to the vibration source and center angle of the trench have different effects on the effective vibration isolation area.When the ratio of the trench depth to Rayleigh wave length is 0.54-0.77, the ratio of trench width to Rayleigh wave length is 0.23-0.33, and the ratio of the distance from the trench to the vibration source to Rayleigh wave length is 1.18-1.52, a good effective vibration isolation area of annular trench can be obtained.Under the conditions of this test, continuously increasing the ratio of each parameter is not beneficial to enlarge the effective vibration isolation area.The central angle of the annular trench is an important factor affecting the effective vibration isolation area.Increasing the angle can obviously enlarge the area of the effective vibration isolation area.When the angle is 90, a discontinuous effective isolation area will be formed in the isolation area.The selection of the angle is related to the frequency, when the effective isolation area of the same size is achieved, and the angle increases with the decrease of the frequency.

Key words： Outdoor test Annular trench Vibration isolation area Geometric parameters

收稿日期: 2018-12-12 出版日期: 2019-10-15

引用本文:

刘晶磊1,2，于川情1,2，刘杰1,2. 环形沟槽几何参数对隔振区域影响的试验研究[J]. 振动与冲击, 2019, 38(20): 266-274.
LIU Jinglei1,2, YU Chuanqing1,2, LIU Jie1,2. A test study on the influence of geometric parameters of annular trench on vibration isolation area. JOURNAL OF VIBRATION AND SHOCK, 2019, 38(20): 266-274.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2019/V38/I20/266

[1] Woods R D. Screening of surface waves in soils[J]. Journal of the Soil Mechanics and Foundations Division, 1968, 94(4): 221-314.
[2] Ahmad S, AI-Hussaini T M. Simplified design for vibration screening by open and in-filled trenches[J]. Journal of Geotechnical Engineering, ASCE 1991, 117(1): 67-88.
[3] Klein R, Antes H, Le Houe dec D. Efficient 3D modeling of vibration isolation by open trenches[J]. Comput Struct, 1997, 64:809-817.
[4] 刘晶磊，于川情，刘桓，等. 隔振沟槽几何参数对隔振效果的影响研究[J].振动工程学报,2018,31(06):930-940.
LIU Jing-lei, YU Chuan-qing, LIU Huan, et al. Influence of geometric parameters of isolation trench on vibration isolation effect[J] Journal of Vibration Engineering, 2018,31(06):930 -940.
[5] 姚锦宝，夏禾，胡敬梁. 空沟对列车运行产生的环境振动隔振效果研究[J]. 中国铁道科学，2018, 39(02): 44-51.
YAO Jin-bao, XIA He, HU Jing-liang. Study on vibration isolation effect of open trench on environmental vibration induced by train operation[J]. China Railway Science, 2018,39(02): 44-51.
[6] 徐平. 空沟对平面纵波隔离效果的理论解答[J]. 振动与冲击，2017, 36(05): 67-71+101.
XU Ping. Theoretical analysis for of isolation effect of an open trench on plane longitudinal waves[J]. Journal of vibration and shock, 2017, 36(05): 67-71+101.
[7] 巴振宁，王靖雅，梁建文. 层状地基中隔振沟对移动列车荷载隔振研究-2.5维IBEM方法[J]. 振动工程学报，2016, 29(05): 860-873.
BA Zhen-ning, WANG Jing-ya, LIANG Jing-wen. Reduction of train induced vibrations by using a trench in a layered foundation[J] Journal of Vibration Engineering, 2016, 29(05): 860-873.
[8] 巴振宁,梁建文,王靖雅. 空沟对层状饱和地基中列车移动荷载的隔振性能研究[J]. 岩土工程学报，2017, 39(05): 848-858.
BA Zhen-ning, LIANG Jian-wen, WANG Jing-ya. Isolation effect of an open trench against train induced vibration in a saturated layered ground[J] Chinese Journal of Geotechnical Engineering, 2017,39(05): 848-858.
[9] 高广运，彭争光，张梦芳，等. 层状地基空沟被动隔振分析[J]. 西北地震学报， 2009, 31(02): 115-120.
GAO Guang-yun, PENG Zheng-guang, ZHANG Meng-fang, et al. Analysis of passive vibration Isolation Using Open Trench in Layered Ground[J]. Northwestern Seismological Journal, 2009, 31(02): 115-120.
[10] 时刚，高广运. 饱和地基中二维空沟远场被动隔振研究[J].振动与冲击，2011, 30(09): 157-162.
SHI Gang, GAO Guang-yun. Two-dimensional analysis of open trench used as passive barriers in saturated soil[J]. Journal of vibration and shock, 2011, 30(09): 157-162.
[11] 熊浩，高广运，王小岗. 均质地基中空沟对交通荷载的隔振分析[J]. 中南大学学报(自然科学版)，2011, 42(08): 2459-2468.
XIONG Hao, Gao Guang-yun, Wang Xiao-gang. Analysis of isolating vibration from traffic by open trench in homogenous ground[J]. Journal of Central South University(Science and Technology), 2011, 42(08): 2459-2468.
[12] 邓亚虹，夏唐代，陈敬虞. 车辆荷载作用下隔震沟隔震效率影响因素分析[J]. 岩土力学，2007(05): 883-887+894.
DENG Ya-hong, Xia Tang-dai, Cheng Jing-yu. Analysis of efficiency of vibration isolating groove subjected to vehicle load[J]. Rock and Soil Mechanics, 2007, (05):883-887+894.
[13] 淳庆，潘建伍. 减振沟在强夯施工时的减振效果研究[J].振动与冲击，2010,29(06):115-120+239-240.
CHUN Qing, PAN Jian-wu. Study on the vibration reduction effect of the dynamic consolidation[J] Journal of vibration and shock，2010, 29(06):115-120+239-240.
[14] 刘晶磊，张雷刚，宋绪国，等. 高速铁路空沟减隔振措施数值分析与模型试验[J]. 铁道标准设计，2017, 61(03): 42-46.
LIU Jing-lei, ZHANG Lei-gang, SONG Xu-guo et al. Numerical analysis and model test of vibration reduction by open trench on high speed railway[J] Railway Standard Design, 2017, 61(03): 42-46.
[15] 陈昆，贾霄，刘彬，等. 高速铁路空沟隔振措施隔振效果的有限元分析[J]. 地震工程学报，2014, 36(03): 575-579.
CHEN Kun, JIA Xiao, LIU Bin, et al. Finite element analysis of reducing the high speed railway vibration effect on the environment using open trenches[J] China Earthquake Engineering Journal, 2014, 36(03): 575-579.
[16] 肖世伟，雷长顺，郭超. 高速铁路空沟隔振数值分析[J]. 铁道工程学报，2011, 28(08): 23-29.
XIAO Shiwei, LEI Changshun, GUO Chao, YAN Shuwang. Numerical analysis of vibration of open trench for high speed railway[J] Journal of railway engineering society, 2011, 28(08): 23-29.
[17] 刘晶磊，冯桂帅，王建华，等. 轨道交通单排非连续隔振屏障隔振效果模型试验研究[J]. 振动与冲击，2018, 37(11):175-182+201.
LIU Jing-lei, FENG Gui-shuai, WANG Jian-hua, et al. Model tests for effects of rail transit´s single row discontinuous vibration isolation barriers[J]. Journal of vibration and shock，2018, 37(11):175-182+201.
[18] 陈云敏，吴世明，曾国煕. 表面波频谱分析法及其应用[J] 岩土工程学报，1992，(03)：61－65.
CHENG Yun-min，WU Shi-ming，ZENG Guo-xi. Surface wave spectrum analysis method and its application[J]. Chinese Journal of Geotechnical Engineering, 1992, (03)：61－65.
[19] 吴世明，曾国熙，陈云敏等. 利用表面波频谱分析测试土层波速[J]. 地震工程与工程振动，1988，(04)：27－32.
WU Shi-ming, ZENG Guo-xi, CHENG Yun-min, et al. Measurement of wave velocity of soil deposits by spectral analysis of surface waves [J]. Earthquake Engineering and Engineering Dynamics,, 1988, (04):27－32.
[20] 徐平，石明生，郭长江. 空沟对SH波隔离效果的理论解答[J]. 地下空间与工程学报，2015,11(03):647-651.
XU Ping, SHI Ming-sheng, GUO Chang-jiang. Theoretical analysis of isolation effects of an open trench on incident SH waves[J]. Chinese Journal of Underground space and engineering, 2015, 11(03):647-651.