1. Random vibrations and energy. Quadratic response estimators
SEA is a method of formulating vibratory exchanges between coupled dynamic systems in the form of a power balance. An historical overview of methodological developments is given in Box 1.
SEA analysis works only on responses to random excitations. Most of the entities introduced into the theory are quadratic operators, from which the rms values of the quantities concerned and their spectral decomposition are deduced.
1.1 Autocorrelation, power spectral density and autospectrum
A random signal x (t), a function of time t, is described to first order by its autocorrelation functionR xx and its amplitude distribution probability density. Random signals...
Exclusive to subscribers. 97% yet to be discovered!
You do not have access to this resource.
Click here to request your free trial access!
Already subscribed? Log in!
The Ultimate Scientific and Technical Reference
This article is included in
Mechanical and dimensional measurements
This offer includes:
Knowledge Base
Updated and enriched with articles validated by our scientific committees
Services
A set of exclusive tools to complement the resources
Practical Path
Operational and didactic, to guarantee the acquisition of transversal skills
Doc & Quiz
Interactive articles with quizzes, for constructive reading
Random vibrations and energy. Quadratic response estimators
Bibliography
Software tools
GSSEA-Light: Gothenburg Sound AB, Sweden
SEAM, SEAM 3D: Cambridge Collaborative Inc, USA
SEA+, SEAVirt, SEA-TEST, SEA-XP: InterAC, 10 impasse Borde-Basse, ZA La Violette,...
Events
Inter-Noise annual conference
French Acoustics Congress organized every two years by the SFA
Standards and norms
- Acoustics – Sound insulation measurement of buildings and building components/Laboratory measurement of airborne sound attenuation by building components. - ISO 140-3 - 1995
- Acoustics – Acoustic insulation measurement of buildings and building components/In situ measurement of airborne sound insulation between rooms. - ISO 140-4 - 1998
- Détermination des niveaux de puissance acoustique émis par les sources...
Directory
Manufacturers – Suppliers – Distributors (non-exhaustive list)
Société française d'acoustique (SFA) :
Documentation – Training – Seminars (non-exhaustive list)
ESI :
InterAC...
Exclusive to subscribers. 97% yet to be discovered!
You do not have access to this resource.
Click here to request your free trial access!
Already subscribed? Log in!
The Ultimate Scientific and Technical Reference