PSI - Issue 48

Samira Belhour et al. / Procedia Structural Integrity 48 (2023) 288–295 Belhour/ Structural Integrity Procedia 00 (2019) 000 – 000

294

7

2020

0 10 20 30 40 50 60 70 80 90 100

2021

0 10 20 30 40 50 60 70 80 90 100

cumulative number of failures (%)

cumulative number of failures (%)

Subsystems

Subsystems

SAE

SAE

Doors

TCMS

Doors

TCMS

lighting

lighting

Bodywork

HVAC,ROOM Bodywork

PA system

PA system

HVAC Cabin

Friction braking HVAC Cabin

HVAC,ROOM

Friction braking

Braking traction

Braking traction

Magnetic braking

Indoor monitoring

Magnetic braking

Flange lubrication

Train safety monitoring Visual information Tacho control unit

Indoor monitoring

Bogie Suspension

Visual information

Tacho control unit

Adhesion restoration Bogie Suspension

Adhesion restoration

Cases and inter cases

Auxiliary energy supply

Train safety monitoring

Auxiliary energy supply Cases and inter cases

External access surveill

External access surveill

Windshield wipers and wa

Miscellaneous And Access Windshield wipers and wa

Miscellaneous And Access

Fig. 6. Distribution of the subsystems most affected by failures during the analysis period.

Table 1. Failure mode and effects Analysis (FMECA)

Failure

N Component Function

Recommended action

Cause of failure

Failure Mode

Effect of failure

Gravity

Frequency

Detection

Criticality

the train will be inoperative without the function of sanding the tram will be immobi lised and repatriated to the maintenance workshop with an end of turn report

-Clogging - Lack of sand Leaking fluid at calliper connection - loss of traction -Wheel deformation

Adhesion restoration

Clogged ejectors Empty tank

have covered storage regular filling Optimise good systematic periodicity train reset -requesting the operator to move the trains to the service station - ensure maintenance of the rail

1

Sanding

3 6 2 12

Friction braking

Major brake failure on bogie

2

Braking

4 6 2 48

-Isolated or locked traction boxes -Vibration in the train

- Immobilisation of the train - Lack of comfort

Braking traction

3

Traction

5 7 2 70

Degradation of rolling stock Discomfort for users

Bogie Suspension

Replacement of the brake control unit

5 6 2 60

4

Comfort

Vibrations

Rail defects

Malfunction Cylinder Lock

Closing Opening

Impossibility: of opening or closing

Optimise the maintenance plan

5 Doors

Lack of traction

4 5 2 40

5. Conclusion Today, for the well-being and satisfaction of users, the maintenance service in urban rail transport is approaching to know the disturbances, to direct the operating procedure towards the most penalizing links, improve the resolution of common problems, identify necessary recommendations, and develop appropriate maintenance plans. Among the