Damped frequency response apparatus, systems, and methods

Details Damped frequency response apparatus, systems, and methods Damped frequency response apparatus, systems, and methods

2007-03-06

2007-03-06

Wachsman, Hal (Department: 2857)

Data processing: measuring, calibrating, or testing

Measurement system in a specific environment

Electrical signal parameter measurement system

C702S056000, C702S041000, C073S579000

Reexamination Certificate

active

11088154

ABSTRACT:
Apparatus, systems, and methods are disclosed to solve an equation associated with a structure of the form {−ω2MR+iωBR+[(1+iγ)KR+i(K4R)]}Y=FR, wherein ω is a time-harmonic excitation frequency, MRis a reduced form of a symmetric mass matrix M, BRis a reduced form of a viscous damping matrix B, γ is a scalar global structural damping coefficient, KRis a reduced form of a symmetric stiffness matrix K, K4Ris a reduced form of a symmetric structural damping matrix K4representing local departures from γ, FRis a reduced form of a matrix F, and Y is a matrix having a plurality of vectors corresponding to the plurality of load vectors acting on the structure and included in the matrix F.

REFERENCES:
patent: 5233540 (1993-08-01), Andersson et al.
patent: 5686667 (1997-11-01), McCollum et al.
patent: 5777236 (1998-07-01), Walls
patent: 6779404 (2004-08-01), Brincker et al.

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