ENGINEERING TRIPOS PART IIB - 2012/2013

Module 4C8 - Applications of Dynamics

AIMS

The material on vehicle vibration introduces some simple mathematical models and performance criteria, and shows how the suspension parameter values can be tuned to optimise performance.

LECTURE SYLLABUS

Introduction (1L) (Dr D. J. Cole and Prof. D. Cebon )

Vehicle dynamics(6L) (Prof D. Cebon)

• Introduction to the creep forces and moments generated by rolling wheels, using the 'brush' model;
• Steady state and transient response of a simple automobile model to steering and side force inputs;
• Introduction to understeer, oversteer, and handling diagrams;
• Stability and cornering of a single railway wheelset and a two-axle railway bogie.

Vehicle vibration (6L) (Dr D. J. Cole)

• Introduction to random vibration, description of road surface roughness;
• Performance criteria;
• Quarter-car model of vehicle vibration, natural modes, conflict diagrams;
• Pitch-plane model, natural modes, wheelbase filtering, suspension tuning;
• Roll-plane model, lateral tyre behaviour, parallel road profiles;
• Vehicle suspension technology.

OBJECTIVES

On completion of the module students should:

• derive the equations of motion of simple vehicle models and calculate the vibration responses;
• understand the trade-offs involved in suspension design.
• explain the influence of vehicle and road parameters on vehicle vibration behaviour.

COURSEWORK

One laboratory experiment on behaviour of rubber tyres, to be performed in pairs, essentially unsupervised. A booking sheet will offer a wide range of possible times at which the experiment may be performed. A normal laboratory write-up is to be prepared, which will be assessed for the coursework credit. Total time commitment will be comparable to a Part IIA major experiment.

REFERENCES

Please see the Booklist for Group C Courses for references for this module.

Last updated: September 2012