Home    Reference Manuals    Return   

Modelling and Simulation of Rail Vehicles

Introduction
Modeling of railway vehicles
Time-domain Simulation and Postprocessing
Track irregularities and Wheel/rail-connection
Multiple runs
Miscellaneous

Introduction

• An overview over the GENSYS software package.
• The UNIX environment.
• Create a simple sine-wave.
• Time-domain simulation theory.
• Create and analyse a car-body resting on four coil-springs.

Hands on session:

• Repeat the creation of the sine-wave
• Analyse the car-body resting on coil-springs.

Modeling of railway vehicles

• Modeling of a 2-axle freight vehicle.
• Modeling of a 4-axle bogie vehicle.
• Checking and debugging the input data model.

Hands on session:

• Repeat the modeling of the 4-axle bogie vehicle
• Do the steps for checking the model
• Curving analysis of the 4-axle bogie vehicle

Time-domain Simulation and Postprocessing

• Simulations with postprocessing:
  • Acceptance test according to UIC 518 and CEN/TC 256 WG 10
  • Ride comfort
  • Wear and energy dissipation
  • Rolling contact fatigue on wheels and rails

Hands on session:

• Copy directory course/vehicle_BoBo+Post to your work space.
• Run the input data file runf/tsim_BoBo.tsimf
• Examine the results by running file diags/tsim_BoBo.ps.
• Improve the running performance of the vehicle

Track irregularities and Wheel/rail-connection

• Create track irregularities
• Classify track irregularities
• Create and examine wheel-rail-geometry functions
• Modeling of the wheel rail connection

Hands on session:

• Create and Evalulate tracks
• Create wheel/rail geometries

Multiple runs

• Run predefined cases in OPTI
• Minimize a goal-function in OPTI
• Estimation of total wear on wheels .
• Collect all results in tables and plots

Hands on session:

• Calculate stability of the BoBo vehicle in the range of vkmh=150-250 and lambda=0.01-1.0
• Calculate max non-linear speed at a effective conicity of 0.50
• Calculate wear v.s. curve radius and estimate total wear for our vehicle

Miscellaneous

• Flexible masses
• Searching in the documentation
• Other couplings and masses not used in the previous examples
• Writing own user defined coupling elements
• Modelling of a three-piece bogie with friction wedges
• Modelling long trains with only longitudinal degrees of freedom

Hands on session:

• Make a modal analysis with a flexible mass