Dynamic Analysis of the Vehicle Running on Turnout at High Speed Considering Longitudinal Variation of Rail Profiles

2005 ◽  
Author(s):  
Hiroyuki Kono ◽  
Yoshihiro Suda ◽  
Masahiro Yamaguchi ◽  
Hiroshi Yamashita ◽  
Yukihide Yanobu ◽  
...  
Keyword(s):  
Dynamic Behavior ◽  
High Speed ◽  
Light Rail ◽  
Longitudinal Variation ◽  
Transit Systems ◽  
Traffic Jam ◽  
Railway Systems ◽  
Body Dynamics ◽  
Multi Body ◽  
High Speed Railroad

Recently, railroad systems are getting increased worldwide attention in order to reduce environmental pollution and traffic jam. The railway systems are light rail transit systems in city or high-speed railroad systems between cities. Up to now, dynamic behavior of the vehicle running on a turnout at high speed was NOT researched. In this research, dynamic behavior of the vehicle running on turnout at high speed was calculated using A’GEM (Multi-Body Dynamics program), which was developed to enable to calculate the longitudinal variation of cross-section of rail profiles with vehicle running on turnout which has tongue rails and crossing rails. This paper shows the analysis method and the results of dynamic simulation of the vehicle running on a turnout at high speed considering longitudinal variation of rail profiles.

Simulation Analysis and Structure Optimum Design of the High Speed Conveying Manipulator Based on ADAMS

2014 ◽  
Vol 945-949 ◽  
pp. 121-126 ◽  
Author(s):  
Feng Wei Xue ◽  
Ji Ping Zhou
Keyword(s):  
Production Line ◽  
High Speed ◽  
Design Theory ◽  
Simulation Analysis ◽  
Structural Characteristics ◽  
Transmission System ◽  
Manufacturing Cost ◽  
Body Dynamics ◽  
Virtual Prototyping Technology ◽  
Multi Body

The conveying manipulator is an indispensable transmission system of JM31-160 automatic stamping production line, and structural characteristics of the manipulator directly affect the productivity of auto stamping production line. Using virtual prototyping technology, basing on the Multi-body dynamics theory, explored the technical line of dynamic design theory to apply on the transmission system. Reaching a conclusion the function of optimized structure is improved, and manufacturing cost brings down.

Safety of a high-speed train passing by a windbreak breach under different wind speeds

2021 ◽  
pp. 095440972110460
Author(s):  
Zhuang Sun ◽  
Syeda Anam Hashmi ◽  
Huanyun Dai ◽  
Guiyu Li
Keyword(s):  
High Speed ◽  
Navier Stokes ◽  
Windward Side ◽  
High Speed Train ◽  
Wind Speeds ◽  
Pressure Fields ◽  
Body Dynamics ◽  
Multi Body ◽  
Yaw Angle ◽  
Moving Train

A derailment phenomenon could take place on the windward side of a 120 km/h high-speed train when it runs by a breach, between two windbreak walls, subjected to a normal wind speed of 32 m/s. To study the safety of a high-speed train under different normal speeds of crosswind, six wind speeds are investigated; 32 m/s, 28 m/s, 25 m/s, 20 m/s, 15 m/s, and 10 m/s. The wind forces and moments of the moving train are calculated using the Unsteady Reynolds-averaged Navier-Stokes (URANS) model, which are then applied to the train multi-body dynamics. The pressure fields around the train passing by the breach are analysed, which gives a reasonable explanation for the fluctuation of the wind loads. After an analysis on the response of the train, it is apparent that the risk of derailment on the windward side is much greater than the risk of overturning. The lateral distance of the first wheelset increases towards the windward side as along with the yaw angle of the wheelset, which increases as well with wind speeds of higher than 20 m/s.

scholarly journals Numerical and Experimental Investigation of Deployment Behaviour of Folded Fin Mechanism based on the Dynamic Loading Conditions

2020 ◽  
Author(s):  
MURAT AVCI ◽  
ÖZER TAGA ◽  
ÖMER KELEŞ
Keyword(s):  
High Speed ◽  
Numerical Models ◽  
Test Results ◽  
Test Device ◽  
Camera System ◽  
Mechanism Model ◽  
Body Dynamics ◽  
Deployment Time ◽  
Dynamic Loading Conditions ◽  
Multi Body

Abstract In this study, the friction and damping values ​​that arise during the deployment of the folded fin mechanism were obtained based on the experimental data. Although there are recommended values ​​for friction in the literature, damping is a phenomenon that varies from system to system and must be obtained through test data. In this study, firstly, the mechanism was operated on the test device with a specific drive pressure and the actual drive pressure generated in the system was measured. The dynamic behaviour of the mechanism was recorded by a High-Speed camera system as well. Adams MBD (multi-body dynamics) was used to define the mechanism model and drive pressure data from the test was defined as input to the model. With the help of Adams DOE (Design of Experiments), certain intervals were defined for friction and damping, multiple analyses were carried out at the friction and damping intervals defined and total deployment time of the mechanism and the dynamic behaviours it exhibited during deployment were obtained. From these numerical results obtained, friction and damping values ​​were obtained based on the model with the highest correlation and test results. The same mechanism was tested for different drive pressures with the specified friction and damping values ​​and the results were compared to the numerical models. It was decided that the friction and damping values ​​determined as a result of the comparison could be used in future numerical analyses.

Numerical Modeling of the Dynamic Behavior of Shredder Hammers and Correlation With Material Damage

2012 ◽  
Author(s):  
Eugenio G. M. Brusa ◽  
Nicola Bosso ◽  
Stefano Morsut
Keyword(s):  
Finite Element ◽  
Dynamic Behavior ◽  
Electric Arc Furnace ◽  
Electric Arc ◽  
Industrial Plant ◽  
Strong Impact ◽  
Arc Furnace ◽  
Body Dynamics ◽  
Multi Body ◽  
The Impact

Pre-forming and fragmentation of the ferrous scrap used into the electric arc furnace for the melting process is a relevant activity for a steelmaking plant. Shredding machines are applied to suitably reduce the size of scrap. A set of hammers is connected to a main rotor. Rotation converts the high kinetic energy of each hammer into a strong impact against the scrap. Metallic parts are crushed and fed into the electric arc furnace. Damage of the hammer material is due to impact, vibration, wear and temperature. In addition fatigue affects its life. An effective prediction of the damage location as well as of its propagation in the hammer is rather difficult. A resident health monitoring system cannot be easily applied. Therefore a preliminary model was built to predict the dynamic behavior of each hammer in rotation and to compute the applied stress, while the impact is occurring. A rotor-dynamic analysis was performed by means of a Multi Body Dynamics and a Finite Element code, respectively. Magnitude, direction and frequency of the dynamic loads were first computed by the Multi Body Dynamics code. Stress exciting the hammer material was then computed by the Finite Element Method. Nonlinearities are crucial for the design operation. Friction among the materials, clearance between the pin and the hammer and the nonlinear behavior of materials are all relevant for the nonlinear dynamic response of the hammer. Numerical results were compared to some preliminary observations performed on an industrial plant. They allowed motivating the occurrence of cracks and wear effects in some critical points of the hammer. Some design criteria were defined and successfully tested to improve the performance of materials.

Vibration Analysis of Seated Passenger on High Speed Railway Vehicle by Multi-body Dynamics

2016 ◽  
Vol 2016 (0) ◽  
pp. G1800105
Author(s):  
Kou HISANO ◽  
Takayoshi KAMADA ◽  
Ryohei SHIMAMUNE ◽  
Shinichi HASEGAWA ◽  
Michiko TANAKA
Keyword(s):  
Vibration Analysis ◽  
High Speed ◽  
Railway Vehicle ◽  
High Speed Railway ◽  
Body Dynamics ◽  
Multi Body
Sign in / Sign up

Export Citation Format

Share Document