Title
Dinamičko ponašanje određenih klasa transportnih mašina sa aspekta incidentnih događaja
Creator
Radoičić, Goran N.
Copyright date
2016
Object Links
Select license
Autorstvo-Nekomercijalno-Bez prerade 3.0 Srbija (CC BY-NC-ND 3.0)
License description
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Language
Serbian
Cobiss-ID
Theses Type
Doktorska disertacija
description
Datum odbrane: 27.09.2016.
Other responsibilities
mentor
Jovanović, Miomir 1951-
član komisije
Vladić, Jovan, 1949-
član komisije
Janošević, Dragoslav.
član komisije
Pavlović, Nenad, 1950-
član komisije
Petrović, Goran, 1974-
Academic Expertise
Tehničko-tehnološke nauke
University
Univerzitet u Nišu
Faculty
Mašinski fakultet
Group
Katedra za transportnu tehniku i logistiku
Alternative title
The dynamical behaviour of certain classes of heavy lifting and construction machinery from the aspect of accidental events
Publisher
[G. N. Radoičić]
Format
[21], 169 listova
description
Transport Technology and Logistics
Abstract (en)
The doctoral dissertation deals with incidents of heavy lifting and
construction machinery. The research studies the stability and the
risk of mechanical systems at the dynamic impulse influences
which determine the safety of supporting structures. Typical
incident events, at work of machinery, which influence in unique
way on placed modelling and dynamical simulation, here are
selected. The surveys on a group of five types of machines were
carried out whereby the models of numerical simulations were
developed, with the help of five experimental investigations of the
structures for supporting model verification. The results of the
disertation are: Exact identification of dangerous forced vibration
frequencies; Mathematical formulation of incidental excitation
forces; Mathematical forms of wind excitation forces with
medium strength in multiple gusts; Geometry of frame structures
with low dynamic stability; Mathematical forms of malicious
excitations with large vibration amplitudes. Elements of risk are
separated and defined: high accelerations, large deflections,
shaking (tremor), extreme dynamic coefficients, loss of contact of
structural parts. The finite element method (FEM) is applied in
transient dynamic analysis of mechanical system. The
experiments on tower crane, bridge crane, shipbuilding (levelluffing)
crane, mining stacker and mobile elevating platform were
performed. The obtained technical models are an incidental design
template which checks sensitivity on extreme and unexpected
influences.
Authors Key words
Dinamički odgovor, eksperimentalno ispitivanje, incidenti,
modalna analiza, modeliranje struktura, okvirne strukture,
oscilacije, simulacija, stabilnost, transportne mašine
Authors Key words
Accidents, dynamical response, experimental testing, FEM modelling,
frame structures, heavy lifting and construction machinery, modal
analysis, simulation, stability, vibration
Classification
621.86/.87:534(043.3)
Subject
T 210
Type
Elektronska teza
Abstract (en)
The doctoral dissertation deals with incidents of heavy lifting and
construction machinery. The research studies the stability and the
risk of mechanical systems at the dynamic impulse influences
which determine the safety of supporting structures. Typical
incident events, at work of machinery, which influence in unique
way on placed modelling and dynamical simulation, here are
selected. The surveys on a group of five types of machines were
carried out whereby the models of numerical simulations were
developed, with the help of five experimental investigations of the
structures for supporting model verification. The results of the
disertation are: Exact identification of dangerous forced vibration
frequencies; Mathematical formulation of incidental excitation
forces; Mathematical forms of wind excitation forces with
medium strength in multiple gusts; Geometry of frame structures
with low dynamic stability; Mathematical forms of malicious
excitations with large vibration amplitudes. Elements of risk are
separated and defined: high accelerations, large deflections,
shaking (tremor), extreme dynamic coefficients, loss of contact of
structural parts. The finite element method (FEM) is applied in
transient dynamic analysis of mechanical system. The
experiments on tower crane, bridge crane, shipbuilding (levelluffing)
crane, mining stacker and mobile elevating platform were
performed. The obtained technical models are an incidental design
template which checks sensitivity on extreme and unexpected
influences.
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