wavelet base approach propos paper analysi optim dynam respons multilay medium subject move load respect materi properti thick support halfspac the investig model consist load move along beam rest surfac multilay medium infinit thick layer differ physic properti the theoret model describ eulerbernoulli equat beam navier elastodynam equat motion viscoelast halfspac the move load model finit seri distribut harmon load special method base wavelet expans function transform domain adopt calcul displac physic domain the interact between beam multilay medium analyz order obtain vibrat respons surfac critic veloc associ the choic specif valu design paramet each layer which minim vibrat respons multilay medium can seen structur optim problem first approach use optim techniqu explor potenti wavelet model present briefli discuss result from analysi vibrat respons present illustr dynam character obtain use method numer exampl reflect result numer optim respect multilay medium paramet also present

Piotr Koziol

M.M. Neves

Multilayered Infinite Medium Subject to a Moving Load: Dynamic Response and Optimization Using Coiflet Expansion

the vibrat damp characterist assembl structur made steel investig experiment modal analysi compar result finit element modal analysi generic experi carri out evalu stiff damp properti structur join patch using result appropri finit element model structur develop where join patch repres thinlay element contain materi properti which deriv from generic experi result the joint stiff model orthotrop materi behavior wherea damp properti repres model constant hysteresi lead complexvalu stiff matrix comparison between experiment numer modal analysi show good agreement more detail damp model conjunct optim procedur joint paramet result improv correl between experiment numer modal quantiti reveal result generic experi sound

A. Schmidt

S. Bograd

L. Gaul

Measurement of Join Patch Properties and Their Integration into Finite-Element Calculations of Assembled Structures

high effici seismic protect bridg have been demonstr passiv control system mechan link select viscoelast energi dissip through viscous friction dri friction these system abl take over deform movement caus temperatur variat those due seismic activ from road traffic number natur factor atmospher anthropogen paramet shock vibrat from road traffic lead degrad viscoelast bond passiv control system base rubber mold the presenc elast dissip nonlinear forc function antiseism system inevit lead quantit qualit chang structur respons bridg viaduct both time spectral domain the implic chang integr stabil bridg viaduct section may from simplest most sever depend type seismic excit which subject for reason imper should identifi quantifi degre nonlinear antiseism system embed structur bridg viaduct order prevent accid sever socioeconom implic way can determin depend nonlinear behavior bear system degre degrad viscoelast link from theoret point view follow paramet vibrat system compar analyz displac acceler bridg deck time frequenc domain hysteret loop represent plane phase power spectral densiti spectrogram acceler signal from experiment point view identifi plot paramet abl provid inform regard abnorm oper bear from elastom system acceler represent time frequenc it spectrogram

A. Leopa

S. Nastac

C. Debeleac

Numerical and Experimental Testing of Normality in the Functioning of the Bearings System

acoustic emission techniqu use structur health monitor civil aeronaut aerospac structur recent structur made composit materi due advantag over tradit materi increas interpret complex failur mode present therefor order make trustworthi techniqu reliabl sourc locat damag mechan character must accomplish account work propos novel approach base chirplet atom decomposit timefrequ energi distribut dispers analysi where failureemit signal separ from extran nois detect mode analyz accord dispers behaviour angular depend characterist dispers relat obtain use higher order plate theori nonabsorb anisotrop plate model use conjunct previous methodolog mode identif local the propos methodolog model valid capabl method overcom practic issu encount test demonstr experiment

M.A. Torres-Arredondo

C.-P. Fritzen

Characterization and Classification of Modes in Acoustic Emission Based on Dispersion Features and Energy Distribution Analysis

the attitud control system acs flexibl space structur fss like rigidflex satellit solar sail demand great reliabl autonomi robust the associ flexibl motion larg angl maneuv impli fss dynam onli captur complex nonlinear mathemat model result fss control perform design linear control techniqu under hypothesi rigid dynam can degrad although vibrat can suppress rapid flexibl effect can introduc track error result minimum attitud acquisit time other hand faster manoeuvr can excit flexibl mode way make fss lose requir point accuraci present work shown new multiobject optim algorithm call mgeo real multiobject gener extremal optimiz real codif good tool use kind problem the mgeo real real code version mgeo evolutionari algorithm its perform find gain non linear control law evalu through it applic problem control larg angl attitud manoeuvr rigidflex satellit the satellit nonlinear model consist rigid central hub clamp free flexibl beam the multiobject approach allow optim conflict object function like time energi result one can find tradeoff solut nondomin solut these solut becom avail design posterior choic individu solut implement the nondomin solut repres design space pareto set object function space pareto front have mind complex implement control algorithm onboard satellit comput preliminari investig has shown nonlinear control base mgeo real algorithm promis techniqu sinc has satisfi all acs requir great advantag mgeo real procedur it capac deal nonlinear system design nonlinear control constant gain facilit board comput implement

I. Mainenti-Lopes

L.C.G. Souza

F.L. De Sousa

Design of a Nonlinear Controller for a Rigid-Flexible Satellite Using Multi-Objective Generalized Extremal Optimization with Real Codification

this paper describ sever interferometr techniqu applic structur damag identif with object mind damag aluminum beam clampedfre freefre boundari condit analyz differ damag case inflict creat small cut perpendicular beam longitudin axi be damag therefor character dimens cut the outofplan displac field modal respons measur electron speckl pattern interferometr system the static dynam rotat field defin spatial deriv displac field measur two differ speckl shearographi system second third order spatial deriv displac field which relat bend moment shear forc comput differenti techniqu the cut locat determin look maximum valu perturb damag indic base bend moment shear forc this method valid compar it result numer one from which most suitabl interferometr techniqu chosen

H. Lopes

J. Ribeiro

J.V. Araújo dos Santos

Interferometric Techniques in Structural Damage Identification

design satellit attitud control system acs involv plant uncertainti larg angl manoeuvr follow stringent point control may requir new nonlinear control techniqu order have adequ stabil good perform robust context experiment valid new nonlinear control techniqu through prototyp way increas confid control design the space mechan control divis dmc inpe construct simul suppli condit implement test satellit acs hardwar softwar the simul can accommod various satellit compon like sensor actuat comput it respect interfac electron depend manoeuvr simul plant can high nonlinear simul inertia paramet well determin plant also can present some kind uncertainti result control design linear control techniqu can have it perform robust degrad therefor control design new nonlinear approach must consid this paper present applic statedepend riccati equation sdre method conjunct kalman filter techniqu design control dmc satellit simul the sdre can consid nonlinear counterpart linear quadrat regul lqr control techniqu initial simpl comparison between lqr sdre control perform after practic applic present address problem like presenc nois process measur incomplet state inform kalman filter consid state observ address issu the effect plant nonlinear nois uncertainti consid perform robust control design sdre kalman filter the simul simulinkbas model has been develop perform simul exampl investig sdre control perform use state estim kalman filter simul have demonstr valid propos approach onc sdre control has present good stabil margin great perform robust

R.G. Gonzáles

Application of the State-Dependent Riccati Equation and Kalman Filter Techniques to the Design of a Satellite Control System

piezoelectr cantilev type sensor locat precis weakimpact touch posit plate present paper sinc import humancomput interfac touch panel system has been rapid increas recent studi could suggest appropri sensor detect weakimpact point effect accur system this sensor detect outofplan vibrat panel when touch finger pen appli the sensor made steel beam singl crystal pmnpt patch bond beam which design detect base vibrat panel the sensor design manufactur verifi detect abil weakimpact attach two differ plate glass 400 400 4 wooden mdf 600 600 9 the experi result sensor compar acceleromet which can also use same purpos show clear weakimpact respons narrowband properti it reson frequenc expect cantilev type sensor studi could appli make simpl flat plate touch panel when time differ arriv method use locat weakimpact point

Young-Sup Lee

Sang-Kwon Lee

Kihong Shin

Piezoceramic Cantilever Sensor Design for Weak-Impact Detection on Plates

corros longterm process result deterior reinforc concret structur most structur problem observ under impact either earthquak servic load might occur due corros therefor predict remain servic life corrod structur play import role prevent serious prematur damag studi corrod 25yearold high school build which has been demolish earlier time analyz function corros rate bondslip relationship were taken account nonlinear analys function corros rate differ time period noncorrod 0 exist 25 50 year after construct were use ensur effect timedepend slip rotat global structur behaviour modifi target postyield stiff each structur member nonlinear pushov analys were perform defin timedepend plastic hing properti consequ corros effect order defin perform level three differ time period nonlinear increment dynam analys ida were perform 20 earthquak ground motion record function corros rate result show bondslip relationship between concret steel veri import evalu nonlinear behaviour corrod structur

Hakan Yalciner

Serhan Sensoy

Ozgur Eren

Effect of Corrosion Damage on the Performance Level of a 25-Year-Old Reinforced Concrete Building

befor establish prioriti set reduct seismic risk water suppli infrastructur necessari understand dynam behavior elev water tank which compon those infrastructur among other inform main frequenc vibrat structur must estim analyt model use analysi design should reproduc frequenc valu obtain insitu dynam test this work focus exclus reinforc concret elev water tank 200750 3 water height 3040 which veri common structur water suppli system portug sinc mid xxth centuri this type structur can also seen mani region around world first nationwid survey conduct determin most common typolog countri term structur layout second insitu campaign use ambient vibrat input perform group select structur determin main frequenc vibrat identifi modal shape damp valu third finit element model sever differ typolog develop use water simpli concentr mass top elast properti model structur includ foundat were calibr frequenc various mode shape obtain analyt model would match frequenc real structur final express deriv estim fundament frequenc group elev water tank typolog base total mass top support structur which includ water global later stiff height tank this studi provid import inform frequenc vibrat rcelev water tank contribut definit way analysi design water tank

H.M. Lopes

C.S. Oliveira

Use of In-Situ Dynamic Measurements to Calibrate Analytical Models of RC-Elevated Water Tanks

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Shock and Vibration publishes papers on all aspects of shock and vibration, especially in relation to civil, mechanical and aerospace engineering applications, as well as transport, materials and geoscience.&nbsp;

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