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This volume gathers the latest advances, innovations and
applications in the field of vibration and technology of machinery,
as presented by leading international researchers and engineers at
the XV International Conference on Vibration Engineering and
Technology of Machinery (VETOMAC), held in Curitiba, Brazil on
November 10-15, 2019. Topics include concepts and methods in
dynamics, dynamics of mechanical and structural systems, dynamics
and control, condition monitoring, machinery and structural
dynamics, rotor dynamics, experimental techniques, finite element
model updating, industrial case studies, vibration control and
energy harvesting, and MEMS. The contributions, which were selected
through a rigorous international peer-review process, share
exciting ideas that will spur novel research directions and foster
new multidisciplinary collaborations.
In this book the dynamics of the non-ideal oscillatory system, in
which the excitation is influenced by the response of the
oscillator, is presented. Linear and nonlinear oscillators with one
or more degrees of freedom interacting with one or more energy
sources are treated. This concerns for example oscillating systems
excited by a deformed elastic connection, systems excited by an
unbalanced rotating mass, systems of parametrically excited
oscillator and an energy source, frictionally self-excited
oscillator and an energy source, energy harvesting system, portal
frame - non-ideal source system, non-ideal rotor system, planar
mechanism - non-ideal source interaction. For the systems the
regular and irregular motions are tested. The effect of
self-synchronization, chaos and methods for suppressing chaos in
non-ideal systems are considered. In the book various types of
motion control are suggested. The most important property of the
non-ideal system connected with the jump-like transition from a
resonant state to a non-resonant one is discussed. The so called
'Sommerfeld effect', resonant unstable state and jumping of the
system into a new stable state of motion above the resonant region
is explained. A mathematical model of the system is solved
analytically and numerically. Approximate analytical solving
procedures are developed. Besides, simulation of the motion of the
non-ideal system is presented. The obtained results are compared
with those for the ideal case. A significant difference is evident.
The book aims to present the established results and to expand the
literature in non-ideal vibrating systems. A further intention of
the book is to give predictions of the effects for a system where
the interaction between an oscillator and the energy source exist.
The book is targeted at engineers and technicians dealing with the
problem of source-machine system, but is also written for PhD
students and researchers interested in non-linear and non-ideal
problems.
In this book the dynamics of the non-ideal oscillatory system, in
which the excitation is influenced by the response of the
oscillator, is presented. Linear and nonlinear oscillators with one
or more degrees of freedom interacting with one or more energy
sources are treated. This concerns for example oscillating systems
excited by a deformed elastic connection, systems excited by an
unbalanced rotating mass, systems of parametrically excited
oscillator and an energy source, frictionally self-excited
oscillator and an energy source, energy harvesting system, portal
frame - non-ideal source system, non-ideal rotor system, planar
mechanism - non-ideal source interaction. For the systems the
regular and irregular motions are tested. The effect of
self-synchronization, chaos and methods for suppressing chaos in
non-ideal systems are considered. In the book various types of
motion control are suggested. The most important property of the
non-ideal system connected with the jump-like transition from a
resonant state to a non-resonant one is discussed. The so called
'Sommerfeld effect', resonant unstable state and jumping of the
system into a new stable state of motion above the resonant region
is explained. A mathematical model of the system is solved
analytically and numerically. Approximate analytical solving
procedures are developed. Besides, simulation of the motion of the
non-ideal system is presented. The obtained results are compared
with those for the ideal case. A significant difference is evident.
The book aims to present the established results and to expand the
literature in non-ideal vibrating systems. A further intention of
the book is to give predictions of the effects for a system where
the interaction between an oscillator and the energy source exist.
The book is targeted at engineers and technicians dealing with the
problem of source-machine system, but is also written for PhD
students and researchers interested in non-linear and non-ideal
problems.
The book covers a wide range of applied engineering research
compactly presented in one volume, and shows innovative practical
engineering solutions for automotive, marine and aviation
industries, as well as power generation related to nonlinear
vibrations excited by limited power sources. While targeting
primarily the audience of professional scientists and engineers,
the book can also be useful for graduate students, and for all of
those who are relatively new to the area and are looking for a
single source with a good overview of the state-of-the-art as well
as up-to-date information on theories, analytical, numerical
methods, and their applications in design, simulations, testing,
and manufacturing. The readers will find here a rich mixture of
approaches, software tools and case studies used to investigate and
optimize diverse powertrains, their functional units and separate
machine parts based on different physical phenomena, their
mathematical model representations, solution algorithms, and
experimental validation.
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