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T~~botogy and Vynam~c~ a~e u6uatty con6~de~ed a~ 6epa~ate 6ubject6.
Acco~d~ngty, ~e6ea~che~6 ~n th06e two 6~etd6 6etdom meet, de6p~te,
the 6act that the~e ~6 a con~~de~a- bie ove~tap 06 ~nte~e~t~ namety
when deat~ng w~th ~otat~ng mach~ne~y cond~t~on mon~to~~ng. Rotat~ng
mach~ne~ a~e u~ed ~n atmo~t eve~y ~ndu~t~~at appt~cat~on namety
m~t~ta~y, powe~ gene~at~on, chem~cat , 600d p~oce6~~ng, etc. Any
powe~ u~e~ o~ gene~at~ng ~y~tem ~6 ba6ed on ~otat~ng mach~ne~ 6uch
a~ tu~b~ne~, 6an~, pump6, comp~e~~o~~, etc. mak~ng the ~c~ent~6ic
e660~t~ in the 6~etd 06 ~otat~ng mach~ne~y in ~ecent yea~~ wett
ju~t~6~ed. Fa~tu~e 06 ~otat~ng component~, due to wea~ andlo~
v~b~a- t~on p~obtem~, ~~ 6t~tt d~66~cutt to p~ed~ct and ~e~utt~
6~eQuentty 6~om ~nadeQuaxe de~~gn. Thi~ i~ o~iginaxed by ~mpe~6ecx
knowtedge 06 the acxuat behav~ou~ 06 xhe ~y~tem~ Ve~pixe xhe
p~og~e~~ achieved in xhe 6ietd~ 06 x~ibotogy and dynamic~, a tack
06 communicaxion ctea~ty ~xitl exi~x~ between xh06e ~nvolved in
de~ign and developmenx ~n ind- x~y and ~e~ea~ch team~ in
un~ve~~ixie6 and othe~ li~hmenx~. B~inging togethe~ x~ibotog~6t~
and dynam~c~6t~ ~n o~de~ xo cont~ibute xo inc~ea6e p~og~e~6 ~n both
6ietd~ wa~ the main object~6 06 the NATO AVVANCEV STUVY INSTITUTE
(ASI) on "VIBRATION ANV WEAR VAMAGE IN HIGH SPEW ROTATING
MACHINERY" hetd ~n T~oia, Po~xugat, 10xh to 22nd Ap~il 1989, and
o~ga- n~zed by CEMUL-Cente~ 06 Mechan~c~ and Maxe~ial~ 06 the
Technicat Un~ve~~~ty 06 Li~bon.
Modal analysis is one of the most powerful tools available to the
engineer for the dynamic analysis of structures. Development has
been rapid and spans the identification and evaluation of vibration
phenomena, the validation, correction and updating of analytical
models and the assessment of structural integrity. The texts
assembled here form a coheren t work. After a first chapter on the
fundamentals of modal analysis, the reader is introduced to signal
processing and the basic rules of exchange and analysis of dynamic
information. The derivation of theoretical models for modal
analysis is then addressed, followed by three chapters on the
different approaches to the derivation of models based in the
identification of experimental data: time domain, frequency domain
and pseudo-testing. This leads to the discussion of updating
analytical models and to model quality assessment techniques.
Further topics treated include damage detection and evaluation,
structural modification, damping modelling, and the normalisation
of complex modes. Less well-known topics are also included: active
control of structures, acoustic modal analysis and neural networks
for modal analysis, advanced optimization methods of model
updating, modal analysis for rotating machinery, and nonlinearity
in modal analysis.
T~~botogy and Vynam~c~ a~e u6uatty con6~de~ed a~ 6epa~ate 6ubject6.
Acco~d~ngty, ~e6ea~che~6 ~n th06e two 6~etd6 6etdom meet, de6p~te,
the 6act that the~e ~6 a con~~de~a- bie ove~tap 06 ~nte~e~t~ namety
when deat~ng w~th ~otat~ng mach~ne~y cond~t~on mon~to~~ng. Rotat~ng
mach~ne~ a~e u~ed ~n atmo~t eve~y ~ndu~t~~at appt~cat~on namety
m~t~ta~y, powe~ gene~at~on, chem~cat , 600d p~oce6~~ng, etc. Any
powe~ u~e~ o~ gene~at~ng ~y~tem ~6 ba6ed on ~otat~ng mach~ne~ 6uch
a~ tu~b~ne~, 6an~, pump6, comp~e~~o~~, etc. mak~ng the ~c~ent~6ic
e660~t~ in the 6~etd 06 ~otat~ng mach~ne~y in ~ecent yea~~ wett
ju~t~6~ed. Fa~tu~e 06 ~otat~ng component~, due to wea~ andlo~
v~b~a- t~on p~obtem~, ~~ 6t~tt d~66~cutt to p~ed~ct and ~e~utt~
6~eQuentty 6~om ~nadeQuaxe de~~gn. Thi~ i~ o~iginaxed by ~mpe~6ecx
knowtedge 06 the acxuat behav~ou~ 06 xhe ~y~tem~ Ve~pixe xhe
p~og~e~~ achieved in xhe 6ietd~ 06 x~ibotogy and dynamic~, a tack
06 communicaxion ctea~ty ~xitl exi~x~ between xh06e ~nvolved in
de~ign and developmenx ~n ind- x~y and ~e~ea~ch team~ in
un~ve~~ixie6 and othe~ li~hmenx~. B~inging togethe~ x~ibotog~6t~
and dynam~c~6t~ ~n o~de~ xo cont~ibute xo inc~ea6e p~og~e~6 ~n both
6ietd~ wa~ the main object~6 06 the NATO AVVANCEV STUVY INSTITUTE
(ASI) on "VIBRATION ANV WEAR VAMAGE IN HIGH SPEW ROTATING
MACHINERY" hetd ~n T~oia, Po~xugat, 10xh to 22nd Ap~il 1989, and
o~ga- n~zed by CEMUL-Cente~ 06 Mechan~c~ and Maxe~ial~ 06 the
Technicat Un~ve~~~ty 06 Li~bon.
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