Dynamics of Mechanical Systems - a.y. 2016/2017
Period (Year/Semester): I/II
Required/expected prior knowledge: Nothing
Lecturers: Di Massa Giandomenico
The course intends to provide the necessary concepts for the identification, mathematical formulation, simulation and testing of the most significant dynamic phenomena in the field of machines and mechanical systems, with particular reference to the flexional critical speeds, torsional oscillations and the elastically constrained rigid body dynamics.
Tables of contents:
Conservative and non-conservative lumped parameters systems, eigenvalues solution, modal model, free vibrations for assigned initial conditions and forced vibration by action of harmonic, periodic and random forces.Dynamics of elastically suspended rigid body, determination of the matrices of the masses and stiffness for discrete and continuous suspension systems. Vehicle suspensions, dynamics of the suspended mass with respect to the ride comfort. Simple and compensated air suspensions, mixed and conjugate suspensions.Forced torsional oscillations, lumped system determination, particular equivalent systems: system of naval propulsion and transmission system of a motor vehicle. Exciting causes of forced vibration, critical speeds, amplitudes of forced elastic vibrations for a system of n-masses.Flexional vibrations and critical speeds, simple system, disk effect, systems n concentrated masses, isostatic and statically indeterminate. Method of transfer matrix.Introduction to experimental modal analysis.
Lections and class or laboratory exercitation.
Textbooks and learning aids:
S. della Valle, G. Di Massa, DINAMICA DEI SISTEMI MECCANICI, Ed. ESA.
Assessment will be oral.