scholarly journals Ground Vibration Attenuation Measurement using Triaxial and Single Axis Accelerometers

2018 ◽  
Vol 995 ◽  
pp. 012113
Author(s):  
A H Mohammad ◽  
N A Yusoff ◽  
A Madun ◽  
S A A Tajudin ◽  
M N H Zahari ◽  
...  
Keyword(s):  
Ground Vibration ◽  
Attenuation Measurement ◽  
Vibration Attenuation

Research on the Vibration Attenuation Rules and Wave Propagation Law under Impacting Drill on the Deep Soil Layer

2011 ◽  
Vol 250-253 ◽  
pp. 1971-1977
Author(s):  
Bo Zhang ◽  
Lian Jin Tao ◽  
Wen Pei Wang ◽  
Ji Dong Li
Keyword(s):  
Wave Propagation ◽  
Soil Layer ◽  
Ground Surface ◽  
Ground Vibration ◽  
Vibration Source ◽  
Vertical Acceleration ◽  
Deep Soil ◽  
Deep Soil Layer ◽  
Propagation Law ◽  
Vibration Attenuation

A field test is carried out to study the effect of vibration while treating foundation using vibroflotation method in the deep soil layer in Zhengzhou, China. The vibration attenuation rules and wave propagation rules in different formations caused by different numbers of drills are analyzed. Evaluate the influence on the adjacent buildings. The result shows that the vibration will be generated in foundation obviously in the process of construction using the method. Vibration force, impact frequency and site soil are important influence factors on ground vibration attenuation. The analysis reveals that the maximum vertical acceleration attenuation velocity was much greater in near area than that in the relative far area. The waves caused by vibration propagate in two ways: (1) surface wave is generated on the wall of drill hole and propagated to the ground surface, and attenuated in a certain distance (<8m); (2) shear wave was generated and propagated in the impacting formation and attenuated from the deep formation to the ground surface. Vibration amplitude is mainly distributed in the low frequency range in the areas which far away from vibration source and in the silt layer near the ground surface.

Analysis and Prediction of Ground Vibration Induced by High-Speed Train

2013 ◽  
Vol 779-780 ◽  
pp. 731-738 ◽  
Author(s):  
Ke Xin Zhang ◽  
Jian Wei Yao ◽  
Ze Ping Zhao
Keyword(s):  
Neural Network ◽  
Test Data ◽  
High Speed ◽  
Ground Vibration ◽  
Vertical Vibration ◽  
Orthogonal Test ◽  
Vibration Level ◽  
High Speed Train ◽  
High Speed Railway ◽  
Vibration Attenuation

The principal aim of this paper is to determine the reasonable design parameters of high-speed railway vibration attenuation. The orthogonal test method is used to design the test of ground vibration induced by high-speed train. Four main factors that impact the maximum ground vertical vibration level are selected, and different values are given to each factor, so 8 groups of combinations can be obtained by using orthogonal test technique. Each group test data of the maximum ground vertical vibration level can be obtained by conducting vehicle testing on-track. In this paper, the primary and secondary factors that impact the maximum ground vertical vibration level are determined by range analysis. Moreover, the neural network theory is used to establish a model of the ground vertical vibration level, and this model can be trained and verified by the test data. The impact factors can be predicted by the method of combining orthogonal test and neural network concerning the specified vibration limit, and the value of maximum ground vertical vibration level with the predicted factors meets the requirement of accuracy. The conclusions provide a valuable reference to the vibration attenuation design of the high-speed railway.

Three-Dimensional Finite Element Simulations of Ground Vibration Generated by High-Speed Trains and Engineering Countermeasures

2005 ◽  
Vol 11 (12) ◽  
pp. 1437-1453 ◽  
Author(s):  
Judith C. Wang ◽  
Xiangwu Zeng ◽  
Robert L. Mullen
Keyword(s):  
Finite Element ◽  
Asphalt Concrete ◽  
High Speed ◽  
Three Dimensional ◽  
Ground Vibration ◽  
Finite Element Simulations ◽  
Modified Asphalt ◽  
Vibration Attenuation ◽  
Dimensional Finite Element ◽  
Three Dimensional Finite Element

In this paper we discuss the benefits of using rubber-modified asphalt concrete in high-speed railway foundations. We present the results from a series of three-dimensional finite element simulations modeling a high-speed train foundation utilizing various trackbed materials. Four trackbed materials were tested for their relative vibration attenuation capacities: ballast, concrete, conventional asphalt concrete, and rubber-modified asphalt concrete. Additionally, studies varying the speed and the weight of the passing train were performed. Parametric studies varying the dimensions of the trackbed underlayment were also examined. From these numerical simulations, it is shown that rubber-modified asphalt concrete outperforms other traditional paving materials in ground vibration attenuation. It is also shown that the speeds and weights of the passing trains and the dimensions of the trackbed have significant effects on the relative performance of the paving materials. Implications for design are discussed.

Numerical Simulations of Vibration Attenuation of High-Speed Train Foundations With Varied Trackbed Underlayment Materials

2004 ◽  
Vol 10 (8) ◽  
pp. 1123-1136 ◽  
Author(s):  
Judith Wang ◽  
Xiangwu Zeng
Keyword(s):  
Dynamic Loading ◽  
High Speed ◽  
Relative Effectiveness ◽  
Ground Vibration ◽  
High Speed Train ◽  
Vibration Attenuation ◽  
High Speed Trains ◽  
Alternative Means ◽  
Parametric Studies ◽  
Materials Used

Interest in high-speed railway as an alternative means of transportation is steadily increasing around the world. However, high-speed trains come with the concern of track vibration and induced noise and ground vibration. Excessive track vibration can cause damage to trains and tracks and reduce riding comfort for passengers. Ground vibration induced by passing trains can also damage and disturb surrounding infrastructure (especially structures housing precision machines or instruments) and residents. One potential solution toward minimizing these vibrations is the use of rubber-modified asphalt concrete (RMAC) as a material for high-speed train trackbed underlayments. In this paper we present the results of a finite element simulation of a high-speed train foundation. The simulated foundation was subjected to dynamic loading in several test scenarios, with RMAC and other traditional paving materials used as trackbed underlayment materials. The ground accelerations at designated points in these simulations were then monitored and compared with one another to determine the relative effectiveness in vibration attenuation. From these parametric studies, RMAC proves to be more effective than currently used paving materials in damping out vibrations from dynamic loading. Implications for field applications are also discussed.

The Practical Formula of Ground Vibration Attenuation Induced by the Parallel Vehicles on a Ring Road

2012 ◽  
Vol 446-449 ◽  
pp. 3137-3140
Author(s):  
Wei Bing Hu ◽  
Xiao Fan Li
Keyword(s):  
Point Source ◽  
Road Traffic ◽  
Moving Load ◽  
Ground Vibration ◽  
Concentrated Load ◽  
Equivalent Radius ◽  
Ring Road ◽  
Vehicle Load ◽  
Vibration Attenuation ◽  
Calculation Results

In this paper, based on the transient moving load equivalent radius, multiple non-point source within as multiple small non-point source, ground vibration amplitude for multiple small non-point attenuation stack, on the basis of considering the ground more than car parallel, will vehicle load simplified as parallel concentrated load, according to the harmonic waves equivalent radius, considering different soil types of geometric attenuation coefficient, gives a practical formulas with ring road of ground vibration attenuation caused by parallel vehicles. And through the comparison between the Xi’an bell Tower ring road traffic vibration decays monitoring and calculation results, the practical formulas are verified.

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