| Purpose: To introduce the learner to the behaviour and analysis of nonlinear systems, in particular nonlinear and forced oscillations. Solutions to linear differential equations can only behave in a fairly limited number of ways, but the presence of nonlinear elements may introduce totally new phenomena. Seemingly simple nonlinear differential equations can lead to unexpectedly complex solution structures. This module introduces analytical approximation methods as well as qualitative methods for analysing the behaviour of solutions to the nonlinear systems. Contents: Perturbation methods, forced oscillations, harmonic and subharmonic response, stability of periodic solutions, bifurcation, structural stability, chaos.
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