Driver influence on vehicle track-ability on floating bridges
Projektarbete, avancerad nivå
Please use this identifier to cite or link to this item:
|Type: ||Projektarbete, avancerad nivå|
|Title: ||Driver influence on vehicle track-ability on floating bridges|
|Authors: ||Balakrishna Bhat, Abhishek|
Adithya Reddy, Chintalapudi
|Abstract: ||Thinking from a traveler’s perspective, it can be said that it is important to reduce travel time.
The Norwegian Public Roads Administration (NPRA) is working on a long term project to
extend the coastal highway route E39 as a continuous stretch of road between Kristiansand
and Trondheim. The road has a number of ferry crossings over fjords. Due to the depth in
the fjords, it is not possible to build conventional bridges. Thus, the objective is to reduce
the travel time by implementing a series of connections (e.g.submerged floating tunnels, subsea
road tunnels and floating bridges). One such fjord crossing is the Bjørnafjorden bridge which
spans for a length of over 5000 m.
The floating bridge will be exposed to a number of varied weather conditions of different
intensities. It is important to assess the vehicle handling and how the driver is experiencing
the moving road surface in these conditions. The bachelor thesis which was proposed on the
same topic, established a method to simulate the weather conditions in the CASTER driving
simulator at Chalmers. The Automotive Engineering project (AEP) aims at evaluating the
driving comfort and handling, when driving over the bridge in different weather conditions.
The main approach adopted is to simulate the driving conditions in CASTER driving simulator,
using the weather data provided by NPRA. Further, driving trials are conducted for a
combination of different weather conditions and vehicle speeds for car and bus models. The
results obtained from the trials are analyzed both subjectively using the driver feedback and
objectively using the data obtained from the driving simulator, to make suitable conclusions
and recommendations regarding the safe operating conditions of the bridge.
The project further concludes the correlation between the weather conditions and drivability
through both subjective and objective data analysis. The weather conditions were varied
from no wind condition to a 100-year storm condition. Also, the most frequently occurring
1-year storm condition was studied in detail with only wind on the vehicle, sea swell and wind
due to the wave conditions. A total of 157 driving trials were conducted with different vehicle
speeds (70 kmph, 90 kmph and 110kmph) and different maneuvers like lane change and
overtaking were performed to analyze the handling and stability of the car and bus. Straight
line driving is also simulated to determine the operating conditions of bridge, to check the safe
speed limit and ability of the driver to stay in lane.
Another deliverable of the project is to develop a driver model to perform a greater number
driving trials to test more conditions. Due to the lack of time and complexity of the weather
data, a basic driver model has been developed and a thorough literature survey has been done
to make suitable suggestions for the existing basic driver model as a future scope of the project.
To sum it up, the vertical and lateral dynamics of the vehicles driving over the bridge are
assessed in a virtual environment. A detailed analysis is done with the help of the data obtained
in order to make suitable recommendations for safe driving on the bridge at different
|Keywords: ||Floating bridge;Driving trials;Simulation;Driver comfort;Lane change;Overtake;Staying in lane;Driver model|
|Issue Date: ||2020|
|Publisher: ||Chalmers tekniska högskola // Institutionen för mekanik och maritima vetenskaper|
|Collection:||Projektarbeten // Project Reports|
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.