Study on vertical vibration and transmission characteristics of railway ballast using impact hammer test

2022 ◽  
Vol 316 ◽  
pp. 125898
Author(s):  
Ganzhong Liu ◽  
Jianli Cong ◽  
Ping Wang ◽  
Shuai Du ◽  
Li Wang ◽  
...  
Keyword(s):  
Vertical Vibration ◽  
Transmission Characteristics ◽  
Railway Ballast

The Statistical Evaluations of Transmission Characteristics, Limits of Ranges and Speeds of Transmission of Information Via the Pulsed Atmospheric Bistatic Optical Channels

2019 ◽  
pp. 97-104
Author(s):  
Mikhail V. Tarasenkov ◽  
Egor S. Poznakharev ◽  
Vladimir V. Belov
Keyword(s):  
Communication Systems ◽  
Estimation Algorithm ◽  
Transmission Characteristics ◽  
Radiation Beam ◽  
Optical Channels ◽  
The Monte Carlo Method ◽  
Wide Range ◽  
Transmission Of Information ◽  
Optical Axes ◽  
Visibility Range

The simulation program by the Monte Carlo method of pulse reactions of bistatic atmospheric aerosol-gas channels of optical-electronic communication systems (OECS) is created on the basis of the modified double local estimation algorithm. It is used in a series of numerical experiments in order to evaluate statistically the transfer characteristics of these channels depending on the optical characteristics of an atmosphere plane-parallel model for wavelengths λ = 0.3, 0.5, and 0.9 μm at a meteorological visibility range SM = 10 and 50 km. The results are obtained for a set of basic distances between the light source and the light receiver up to 50 km and for the angular orientations of the optical axes of a laser radiation beam and of the receiving system in a wide range of their values. The dependences of the pulse reactions maximum values over-the-horizon channels of the OECS on the variations of these parameters are established.

A 3-DOF Inchworm Using Levitation Caused by Vertical Vibration

2014 ◽  
Vol 134 (11) ◽  
pp. 1716-1723 ◽  
Author(s):  
Akihiro Torii ◽  
Mitsuhiro Nishio ◽  
Kae Doki ◽  
Akiteru Ueda
Keyword(s):  
Vertical Vibration

Estimating vibration transmission characteristics in tooth roots: A study.

1987 ◽  
Vol 31 (4) ◽  
pp. 907-915
Author(s):  
Eiichi Hanzawa ◽  
Hideaki Takehana ◽  
Akira Kimura ◽  
Minoru Toyoda ◽  
Etsuro Matsuo
Keyword(s):  
Transmission Characteristics ◽  
Vibration Transmission ◽  
Tooth Roots

Analysis of Transmission Characteristics of Copper/Carbon Nanotube CompositeThrough-Silicon Via Interconnects

2019 ◽  
Vol 28 (5) ◽  
pp. 920-924
Author(s):  
Kai FU ◽  
Jie ZHENG ◽  
Wen sheng ZHAO ◽  
Yue HU ◽  
Gaofeng WANG
Keyword(s):  
Carbon Nanotube ◽  
Transmission Characteristics

scholarly journals Development of fragility curves for railway ballast and embankment scour due to overtopping flood flow

2016 ◽  
Author(s):  
Ryota Tsubaki ◽  
Koji Ichii ◽  
Jeremy D. Bricker ◽  
Yoshihisa Kawahara
Keyword(s):  
Spatial Distribution ◽  
Failure Probability ◽  
Fragility Curves ◽  
Railway Track ◽  
Single Track ◽  
Hydraulic Analysis ◽  
Railway Ballast ◽  
Log Normal ◽  
Flood Flow

Abstract. Fragility curves evaluating risk of railway track ballast and embankment fill scour were developed. To develop fragility curves, two well-documented single-track railway washouts during two recent floods in Japan were investigated. Type of damage to the railway was categorized into no damage, ballast scour, and embankment scour, in order of damage severity. Railway overtopping surcharge for each event was estimated via hydrologic and hydraulic analysis. Normal and log-normal fragility curves were developed based on failure probability derived from field records. A combined ballast and embankment scour model was validated by comparing the spatial distribution of railway scour with the field damage record.

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