Week 2 Railwheel and Track

WEEK 2: SIMULATION ON RAIL WHEEL AND TRACK

AIM
To simulate the Railwheel and track for their lifecycle and the stress, strain, and total deformation provided by the wheel running on the track by the given forces.

OBJECTIVE
The main focus of this component is to evaluate the result of the product life cycle and the stress, strain, and total deformation in the static structural material. This component to be examined by two cases

Case 1: Load of 100000 N.
Case 2: Load of 5 times of 100000N.
And Implement user-defined results and compare both results in all aspects of the evaluation.

INTRODUCTION
Rail wheel concept
The train wheel or a rail wheel is specially designed for use of railway tracks. This rolling component (wheel) is especially pushes
onto on axle and mounted directly on a railway carriage or locomotive or indirectly we can say boogie. This wheel is cast or forged
and is heated or treated to have a specific hardness. New wheels are trued, using a lathe, to a specific profile before being pressed
onto an axle. All wheels profile must be regularly checked to ensure proper interaction between the rail and wheel. Incorrect
trued or worn out wheels can increase rolling resistance, reduce energy efficiency and many even cause a derailment.

Fig 1:
Rail wheel and track
Wheel Geometry and Flange, most train wheels have a conical geometry, which is the initial means of keeping the train motion
aligned with the track. The train wheels have a flange on one side to keep the wheels and hence the train, running on the rail
when the limits of geometry-based alignment are reached.

PROCEDURE
For the simulation of the rail wheel and track the static structural material which is default has been used to evaluate the result.
First, the geometry is imported and then opened directly in the mechanical module.

Fig 3: Geometry of rail wheel and track
To set up certain parameters and loads for the simulation process of the rail wheel and track the materials is default as structural
steel with the property mentioned below.

Fig 4: Properties of static structural

To understand the contact between the rail wheel and track they are renamed based on the definition and then flip contact to
the target. Two contacts are provided between them:

1) Frictional- WHEEL to RAIL.

Fig 5:
Contact between wheel to running rail

2) Frictionless - shaft to the wheel.

Fig 8:
Contact parameters shaft to the wheel

After giving the parameters, the joints to be applied for the application to be run on the simulation process while evaluating the result.
The first joined is applied is the fixed joint for the non-moment of the track while running the wheel on them.

Fig 10:
Parameters of fixed joint

Second is the transitional joint given to the shaft, was the shaft is attached to the wheel the forces act on the shaft will b
transitional to the wheel.

The final joint is the planar joint which provided to the wheel.

Fig 14: Parameters of Planar joint

Mesh
Element size: 30mm
and the three faces are selected with the facing size around 15mm.

Fig 17: Mesh statistics
Giving the appropriate parameters in the analysis setting with some joint load that need to apply on the geometry.

Analysis setting

Fig 18:
Analysis settings
After getting the parameters of the analysis setting two loads are applied

1) Bearing load with the value of 100000N

2) Bearing load with the value of 500000N

2) Joint displacement

The following parameters need to be evaluated for the result of the rail wheel and track:

Equivalent Von misses stress.
Total deformation.
Life cycle.
User-defined result.

life

contact status - pressure

fatigue tool - life

USER DEFINED HYDROSTATIC STRESS => (S1+S2+S3)/3

USER DEFINED DEFORMATION=> (UX+UY+UZ)/3

RESULT COMPARISION