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Axially excited spatial double pendulum nonlinear dynamics.
(Politechnika Łódzka. Wydział Mechaniczny. Katedra Automatyki, Biomechaniki i Mechatroniki., 2015)
Analysis of a 3D spatial double physical pendulum system, coupled by two
universal joints is performed. External excitation of the mechanism is realized
by axial periodic rotations of the first joint of the pendulum. ...
Dynamics of two coupled 4-DOF mechanical linear sliding systems with dry friction.
(Politechnika Łódzka. Wydział Mechaniczny. Katedra Automatyki, Biomechaniki i Mechatroniki., 2015)
The paper introduces a model of two identical coupled 4-DOF mechanical
linear sliding systems with dry friction coupled with each other by a linear torsional
spring. The appropriate components (bodies) of the coupled ...
Strain analysis and structural optimization of functionally graded rod with small concentration of inclusions.
(Politechnika Łódzka. Wydział Mechaniczny. Katedra Automatyki, Biomechaniki i Mechatroniki., 2015)
The homogenization procedure is applied to strain analysis and optimal
design of a Functionally Graded (FG) rod in the case when the inclusion size is
essentially less than a distance between them. The method is illustrated ...
Simulating the damped vibrations of a fractional oscillator with fuzzy initial conditions.
(Politechnika Łódzka. Wydział Mechaniczny. Katedra Automatyki, Biomechaniki i Mechatroniki., 2015)
A Picard-like scheme using quadrature and differential quadrature
rules, formerly introduced to solve integro-differential equations, is herein adapted
to solve the problem of an oscillator with damping defined by the ...
Internal resonances in nonlinear vibrations of a continuous rod with microstructure.
(Politechnika Łódzka. Wydział Mechaniczny. Katedra Automatyki, Biomechaniki i Mechatroniki., 2015)
Nonlinear longitudinal vibrations of a periodically heterogeneous rod are considered. Geometrical nonlinearity is described by the Cauchy–Green strain tensor. Physical nonlinearity is modelled expressing the energy of ...
Double pendulum colliding with a rough obstacle.
(Politechnika Łódzka. Wydział Mechaniczny. Katedra Automatyki, Biomechaniki i Mechatroniki., 2015)
The externally excited and damped vibrations of the double pendulum in the vertical plane are considered. The pendulum can collide with a rough obstacle many times during its motion. The pendulum is modeled as a piecewise ...
Theoretical analysis of the foil bearings dynamic characteristics.
(Politechnika Łódzka. Wydział Mechaniczny. Katedra Automatyki, Biomechaniki i Mechatroniki., 2015)
In the theoretical analysis, three systems were identified: a rotor, a
gas film and a exible structure. The mathematical analysis involves formulation of analytical equations for each of these elements and determination ...
Influence of intermediate foil on air-foil bearings performance and exploitation properties.
(Politechnika Łódzka. Wydział Mechaniczny. Katedra Automatyki, Biomechaniki i Mechatroniki., 2015)
Air-foil technology is an interesting alternative for classic rolling or oil
bearings in turbomachinery. It ensures low power losses, do not require external
lubrication or pressurization and is capable of working with ...
Modelling and numerical simulations of a pendulum elastically suspended and driven by frictional contact with rotating disk.
(Politechnika Łódzka. Wydział Mechaniczny. Katedra Automatyki, Biomechaniki i Mechatroniki., 2015)
The work concerns modelling and numerical simulations of a special kind of physical pendulum frictionally driven. The pendulum’s joint is suspended elastically in the plane of the motion resulting in the full plane motion ...
Mathematical model of a multi-parameter oscillator based on a core-less three-phase linear motor with skewed magnets.
(Politechnika Łódzka. Wydział Mechaniczny. Katedra Automatyki, Biomechaniki i Mechatroniki., 2015)
This paper uses the example of a three-phase core-less linear motor to create
a mathematical model of single-dimension multi-parameter oscillator. The studied
linear motor consists of: a stator, an U-shaped stationary ...