Bus Passenger Seats - Simulation and Testing for Life Cycle Requirement 2015-26-0235
Generally it is observed that in city buses most of the time, passenger seat fails at the seat mounting area in buses which are used for more than 3 years. This fatigue failure doesn't get captured either in Anchorage Test or Limited Vibration Test.
Passenger seats' durability should be equal to vehicle life which is 10L km or 12 Years of life span. Physical testing on the vibration test rig is time consuming and costly. Most of the time machine availability for testing will be an issue, to validate alternate seat proposals. So there is a need to establish a correlation between physical testing and CAE simulation so that alternate proposals can be easily and quickly verified using CAE alone.
This paper deals with the verification and validation of passenger seat in buses for life cycle requirement, through various methodologies adopted from data collection, CAE verification and physical validation to simulate real-time environment. Several iterations were conducted to map various failures and to keep the weight of the seat in specified limits. Generally failures occurred on back rest support, seat mounting area and seat leg. Existing seats are used to check the durability and various failures are reproduced in CAE. By establishing this method to evaluate seat proposals of different designs and different suppliers through CAE, one can ensure faster development time and arrive at a cost effective solution.