- Type of paper
: Book
Title: TECHNICAL MECHANICS
- Authors:
- Stegić, Milenko (44723)
Publisher: Sveučilište u Zagrebu, Elektrotehnički fakultet
ISBN: 86-7819-012-4
Year: 1992
Number of pages: 231
Number of references: 20
Language: hrvatski
- Type of paper
: Paper in proceedings
Title: ROTOR OPTIMISATION BY VIBRATION CRITERIA
- Authors:
- Stegić, Milenko (44723)
- Kranjčević, Nenad
Proceedings title: Zbornik Prvog savjetovanja Hrvatskog komiteta CIGRE I.sekcija
Language: hrvatski
Place: Zagreb
Year: 1993
Pages: from 133 to 141
Meeting: Prvo savjetovanje Hrvatskog komiteta CIGRE (Hrvatski komitet međunarodne konferencije za velike električne sisteme)
Held: from 10/10/93 to 10/13/93
Summary: The optimisation method has been carried out on a simple
rotorexample with the aim to achieve desired natural frequencies.
Forobjective function the deviation square value has been taken.Numerical
solution has been achieved by means of program packageMATLAB.
Keywords: rotor vibrations, optimisation
- Type of paper
: Paper in proceedings
Title: VIBRATION OF ROTOR-BEARINGS SYSTEMS
- Authors:
- Stegić, Milenko (44723)
- Mikulić, Boris
- Editors
- Smolčić Žerdik, Zora
Proceedings title: XVI Zbornik radova Fakulteta strojarstva i brodogradnje Sveučilišta u Zagrebu
Language: hrvatski
Place: Zagreb
Year: 1992
ISBN/ISSN: 0350-3097
Pages: from 61 to 68
Summary: The paper shows numerical procedure for analysing vibration
ofrotor-bearing systems based on finite element method. The systemis
modelled with rigid discs, shaft finite elements and bearingsfor which
experimentally achieved stiffness and oil-film dampingcoefficients are
taken into account. Equation of motion arederived in inertial frame of
reference involving the influence ofrotary inertia, gyroscopic effect and
axial load.
Keywords: vibration of rotor, finite elements, hydrodinamic journal bearing
- Type of paper
: Paper in proceedings
Title: DETERMINATION OF THE PLASTIC SHAKEDOWN LIMITS BY
FICTITIOUS HOLONOMIC SOLUTION
- Authors:
- Vranković, Nikola (53203)
- Editors
- Alfirević, Ivo
Proceedings title: Zbornik radova 7. jugoslavenskog simpozija o plastičnosti
Language: hrvatski
Place: Zagreb
Year: 1991
Pages: from 28 to 33
Meeting: 7. jugoslavenski simpozij o plastičnosti
Held: from 06/05/91 to 06/07/91
Summary: Plastic shakedown is defined as the possibility that within
apart of the structure elastic shakedown occurs and within otherpart
alternating plasticity. Simplified form of the upper boundshkedown theorem
is usually used for solving this problem but thepaper describes
determination of the plastic shakedown limits byfictitious holonomic
solution.
Keywords: plastic shakedown, cyclic loading, ficititous holonomic solution
- Type of paper
: Paper in proceedings
Title: POSSIBLE ANALYSIS OF FORCED VIBRATIONS OF AN IMPACT-PAIR
BY THE METHOD OF HARMONIC BALANCE
- Authors:
- Wolf, Hinko (162353)
- Editors
- Smolčić Žerdik, Zora
Proceedings title: ZBORNIK RADOVA FAKULTETA STROJARSTVA I BRODOGRADNJE SVEUČILIŠTA U ZAGREBU
Language: hrvatski
Place: Zagreb
Year: 1994
ISBN/ISSN: 1330-4364
Pages: from 37 to 44
Summary: In this paper the possible analysis of forced vibrations of
an impact_pair by the method of harmonic balance is analysed.The obtained
results are checked by using a piecewise linear technique.By comparing the
obtained results,the frequency ranges in which the method of harmonic
balance gives satisfactory accurate and reliable results are established.
Keywords: impact pair,forced vibrations,method of harmonic balance
- Type of paper
: Paper in proceedings
Title: THE RELIABILITY OF ANALYSIS OF FORCED VIBRATIONS OF A
MECHANICAL SYSTEM WITH CLEARANCES BY USING THE METHOD OF HARMONIC BALANCE
- Authors:
- Wolf, Hinko (162353)
- Editors
- Sorić, Jurica
- Vranković, Nikola (53203)
Proceedings title: ZBORNIK RADOVA 1. KONGRESA HRVATSKOG DRUŠTVA ZA MEHANIKU
Place: Pula
Year: 1994
ISBN/ISSN: 953-96243-0-4
Pages: from 358 to 364
Meeting: 1. KONGRES HRVATSKOG DRUŠTVA ZA MEHANIKU
Held: from 09/14/94 to 09/17/94
Summary: Forced vibrations of a mechanical system with a piecewise
linear force displacement relationship is analysed.Frequency response
characteristics are approximatively obtained by applying the method of
harmonic balance.The results are valuated by using a piecewise linear
technique.By comparing the obtained results,the frequency ranges in which
the method of harmonic balance gives satisfactory accurate results are
established.
Keywords: clearances,forced vibrations,method of harmonic balance
- Type of paper
: Paper in proceedings
Title: VIBRATION CRITERIA IN ROTOR OPTIMISATION
- Authors:
- Stegić, Milenko (44723)
- Kranjčević, Nenad
- Editors
- Smolčić Žerdik, Zora
Proceedings title: XVIII Zbornik radova Fakulteta strojarstva i brodogradnje Sveučilišta u Zagrebu
Language: hrvatski
Place: Zagreb
Year: 1994
ISBN/ISSN: 0350-3097
Pages: from 21 to 28
Summary: The optimisation method has been carried out on the example
of a simple rotor with the aim to achieve the desired natural frequency.
For obtaining the objective function the variance with respect to the
natural frequency has been taken into account. Solution of the problem has
been achieved numerically.
Keywords: rotor vibrations, optimisation
- Type of paper
: Paper in proceedings
Title: VIBRATION CRITERIA IN ROTOR OPTIMISATION
- Authors:
- Stegić, Milenko (44723)
- Kranjčević, Nenad
- Editors
- Smolčić Žerdik, Zora
Proceedings title: XVII Zbornik radova Fakulteta strojarstva i brodogradnje Sveučilišta u Zagrebu
Language: hrvatski
Place: Zagreb
Year: 1993
ISBN/ISSN: 0350-3097
Pages: from 45 to 52
Summary: The optimisation method has been carried out on a simple
rotor example with the aim to achieve the desired natural frequencies. For
obtaining the objective function the variance with respect to natural
frequencies has been taken into account. Numerical solution has been
achieved by means of the program package, MATLAB.
Keywords: rotor optimisation, vibrations
- Type of paper
: Paper in proceedings
Title: ANALIZA PLASTIČNOG SHAKEDOWNA POMOĆU UVJETA POSTOJANJA
ALTERNIRAJUĆE PLASTIČNOSTI
- Authors:
- Vranković, Nikola (53203)
- Editors
- Sorić, Jurica
- Vranković, Nikola (53203)
Proceedings title: ZBORNIK RADOVA 1. KONGRESA HRVATSKOG DRUŠTVA ZA MEHANIKU
Language: engleski
Place: Zagreb
Year: 1994
ISBN/ISSN: 953-96243-0-4
Pages: from 145 to 151
Meeting: 1. KONGRES HRVATSKOG DRUŠTVA ZA MEHANIKU
Held: from 09/14/94 to 09/17/94
Summary: The nonratchetting condition for reversed plasticity is
established for an elastic-perfectly plastic solid body subjected to
cyclic/steady loads such as to produce plastic shakedown (i.e. alternating
plastic strains take place within one part of the body and elastic
shakedown within other part). In one example this condition is used to
determine the plastic shakedown boundary.
Keywords: Shakedown, elastic and plastic shakedown, reversed plasticity
- Type of paper
: M.A.
Title: VIBRATIONS OF MECHANICAL SYSTEMS WITH CLEARANCES
- Authors:
- Bonači, Juraj (4445)
- Stegić, Milenko (44723)
Faculty: Fakultet strojarstva i brodogradnje Sveučilište u Zagrebu
Date of defense: 02/18/94
Language: hrvatski
Number of pages: 110
Summary: This paper deals with mechanical systems with
clearance-typenon-linearities. Two direct numerical integration methods
aredisplayed.
The accuracy and convergence of both of these methods are shownon one
particular example of piecewise linear SDOF system. Theapplication of these
methods on MDOF systems was shown bysimulating the frequency response
characteristics of one 2DOFsystem under different loading of external
harmonic excitation.
Keywords: nonlinear vibrations, clearances, direct integration methods
- Type of paper
: M.A.
Title: VIBRATIONAL BEHAVIOUR OF ROTOR BEARING SYSTEMS
Faculty: Fakultet strojarstva i brodogradnje Sveučilište u Zagrebu
Date of defense: 07/12/93
Language: hrvatski
Number of pages: 150
Summary: This work shows a numerical procedure for lateral
vibrationanalysis of rotor in hydrodinamic joural bearings.
Developedprocedure is based on finite element method. Rotor is modelledwith
shaft finite elements, rigid disc finite elements andelements representing
the influence of bearings. Tapered beamfinite element for shaft modeling
has been developed, taking intoaccount shear deformation, gyroscopic
effect, rotary inertia andaxial load. Stiffness and damping coefficients of
the wholecircular journal bearings are calculated using Galerkin's
method.The application of developed numerical procedure is illustratedby
examples. Results show strong influence of the fluid-filmforces on
vibrational behaviour of rotors.
Keywords: vibrations of rotor, finite elements, hydrodinamic journal bearing
- Type of paper
: M.A.
Title: VIBRATIONS OF NON-LINEAR MECHANICAL SYSTEMS
Faculty: Fakultet strojarstva i brodogradnje Sveučilište u Zagrebu
Date of defense: 01/20/94
Language: hrvatski
Number of pages: 93
Summary: Forced vibration of a single-degree-of-freedom system
witha piecewise linear force-displacement relationship is
analysed.Parametric analysis is applied, using the method of
harmonicbalance. The method of harmonic balance is approximative andlimited
to consideration of steady-state frequency response forprimary resonance
only.
Obtained results are validated by using a piecewise lineartechnique,
which includes effects of superharmonics andsubharmonics in a response. The
existence of superharmonics andsubharmonics and their effect on the time
domain response is
verified using Fourier transformation.
By comparing the results obtained by these methods, it isestablished
that both methods give very similar results in thedouble-sided frequency
ranges, which were predicted by the methodof harmonic balance. By analysing
the time-domain responses
in these frequency ranges, it is established that the assumptionof
dominance of primary resonance in response is satisfied, underwhich the use
of the method of harmonic balance is based.
Keywords: nonlinear vibrations, piecewise linear characteristics, harmonic balanse method, piecewise linear technicque
- Type of paper
: Mentorship
Title: VIBRATIONS OF NON-LINEAR MECHANICAL SYSTEMS
Faculty: Fakultet strojarstva i brodogradnje Sveučilište u Zagrebu
Date of defense: 01/20/94
Number of pages: 93
Author: Wolf Hinko
Degree level: M.A.
- Type of paper
: Mentorship
Title: VIBRATIONS OF MECHANICAL SYSTEMS WITH CLEARANCES
Faculty: Fakultet strojarstva i brodogradnje Sveučilište u Zagrebu
Date of defense: 02/18/94
Number of pages: 110
Author: Kranjčević Nenad
Degree level: M.A.
- Type of paper
: Mentorship
Title: VIBRATIONAL BEHAVIOUR OF ROTOR-BEARING SYSTEMS
Faculty: Fakultet strojarstva i brodogradnje Sveučilište u Zagrebu
Date of defense: 07/12/93
Number of pages: 150
Author: Mikulić Boris
Degree level: M.A.
- Type of paper
: Invited lecture
Title: VIBRATIONS OF MECHANICAL SYSTEMS WITH CLEARANCES
Institution: Hrvatsko društvo za mehaniku
Year: 1994
- Type of paper
: Invited lecture
Title: VIBRATIONS OF NONLINEAR MECHANICAL SYSTEMS WITH CLEARANCES
Institution: Hrvatsko društvo za mehaniku
Year: 1994
