scholarly journals 215 Study of human body effect to vibration of railway vehicle body

2000 ◽  
Vol 2000.75 (0) ◽  
pp. _2-29_-_2-30_ ◽  
Author(s):  
Tetsuo KANEDA ◽  
Hidekazu KOBAYASHI ◽  
Mitsuaki ODA ◽  
Satoru AKIYAMA
Keyword(s):  
Human Body ◽  
Vehicle Body ◽  
Railway Vehicle ◽  
Body Effect

A numerical assessment of the human body effect in the transmission of wireless microphones

2018 ◽  
Vol 61 (3) ◽  
pp. 809-817
Author(s):  
Eugenia Cabot ◽  
Ivica Stevanovic ◽  
Niels Kuster ◽  
Myles H. Capstick
Keyword(s):  
Human Body ◽  
Body Effect ◽  
Numerical Assessment

scholarly journals Simulation Analysis of a Multiple-Vehicle, High-Speed Train Collision Using a Simplified Model

2018 ◽  
Vol 2018 ◽  
pp. 1-11 ◽  
Author(s):  
Suchao Xie ◽  
Weilin Yang ◽  
Ping Xu
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
High Speed ◽  
Large Scale ◽  
Computing Time ◽  
Element Model ◽  
Vehicle Body ◽  
Railway Vehicle ◽  
Storage Space ◽  
High Speed Train

To solve the problems associated with multiple-vehicle simulations of railway vehicles including large scale modelling, long computing time, low analysis efficiency, need for high performance computing, and large storage space, the middle part of the train where no plastic deformation occurs in the vehicle body was simplified using mass and beam elements. Comparative analysis of the collisions between a single railway vehicle (including head and intermediate vehicles before, and after, simplification) and a rigid wall showed that variations in impact kinetic energy, internal energy, and impact force (after simplification) are consistent with those of the unsimplified model. Meanwhile, the finite element model of a whole high-speed train was assembled based on the simplified single-vehicle model. The numbers of nodes and elements in the simplified finite element model of the whole train were 63.4% and 61.6%, respectively, compared to those of the unsimplified model. The simplified whole train model using the above method was more accurate than the multibody model. In comparison to the full-size finite element model, it is more specific, had more rapid computational speed, and saved a large amount of computational power and storage space. Finally, the velocity and acceleration data for every car were discussed through the analysis of the collision between two simplified trains at various speeds.

A Study on the Vehicle Body Effect on Brake Noise

2016 ◽  
Author(s):  
Bongho Kim ◽  
Jeongkyu Kim ◽  
Kwang Yun Kim ◽  
Jung Hoon Woo
Keyword(s):  
Vehicle Body ◽  
Body Effect ◽  
Brake Noise

scholarly journals Optimisation of polynomial railway transition curves of even degrees

2015 ◽  
Vol 35 (3) ◽  
pp. 71-86 ◽  
Author(s):  
Krzysztof Zboiński ◽  
Piotr Woźnica
Keyword(s):  
Simulation Software ◽  
Lateral Acceleration ◽  
Vehicle Body ◽  
Railway Vehicle ◽  
Vehicle Model ◽  
Vehicle Simulation ◽  
Optimisation Methods ◽  
Advanced Model ◽  
Transition Curves

This paper represents new results obtained by its authors while searching for the proper shape of polynomial railway transition curves (TCs). The search for the proper shape means the evaluation of the curve properties based on chosen dynamical quantities and generation of such shape with use of mathematically understood optimisation methods. The studies presented now and in the past always had got a character of the numerical tests. For needs of this work advanced vehicle model, dynamical track-vehicle and vehicle-passenger interactions, and optimisation methods were exploited. In this software complete rail vehicle model of 2-axle freight car, the track discrete model, and non-linear description od wheel-rail contact are used. That part of the software, being vehicle simulation software, is combined with library optimisation procedures into the final computer programme. The main difference between this and previous papers by the authors are the degrees of examinated polynomials. Previously they tested polynomial curves of odd degrees, now they focus on TCs of 6th, 8th and 10th degrees with and without curvature and superelevation ramp tangence in the TC’s terminal points. Possibility to take account of fundamental demands (corresponding values of curvature in terminal points) concerning TC should be preserved. Results of optimisation are compared both among themselves and with 3rd degree parabola. The aim of present article is to find the polynomial TCs’ optimum shapes which are determined by the possible polynomial configurations. Only one dynamical quantities being the results of simulation of railway vehicle advanced model is exploited in the determination of quality function (QF1). This is: minimum of integral of vehicle body lateral acceleration.

scholarly journals Human Body Effect on Static UWB WBAN Off-Body Radio Channels

2020 ◽  
pp. 17-25
Author(s):  
Timo Kumpuniemi ◽  
Juha-Pekka Mäkelä ◽  
Matti Hämäläinen ◽  
Kamya Yekeh Yazdandoost ◽  
Jari Iinatti
Keyword(s):  
Human Body ◽  
Body Effect ◽  
Radio Channels

Effect of Low-Frequency Vibration on Human Body in Standing Position Exposed to Railway Vehicle

2018 ◽  
Vol 10 (3) ◽  
Author(s):  
Rajesh Govindan ◽  
Suraj Prakash Harsha
Keyword(s):  
Finite Element ◽  
Natural Frequency ◽  
Human Body ◽  
Low Frequency ◽  
Vertical Direction ◽  
Standing Position ◽  
Mode Shapes ◽  
Railway Vehicle ◽  
Lateral Direction ◽  
Low Frequency Vibration

In this paper, the dynamic characteristics of the human body were investigated by developing a 3-D finite element model based on 50th percentile anthropometric data for a 54 kg Indian male subject in standing position by considering human body segments as an ellipsoid. The finite element modal analysis is carried out to extract several low-frequency vibration modes and its vibration mode shapes were presented in this paper. The results show that the lowest natural frequency of the standing passenger model occurs in the fore-and-aft direction. The second natural frequency occurs in the lateral direction and the first order natural frequency of the standing passenger model in the vertical direction occurs at 5.379 Hz. The model will be helpful to predict the vibration response of human body under various vibration environment encounters in the railway vehicle.

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