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1

Axial vibration of bars using fractional viscoelastic material models

Łabędzki P., Pawlikowski R., Radowicz A.

Vibrations in Physical Systems

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2018

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Vol. 29

art. no. 2018009

EN

This paper presents dynamic analysis of a bar with one end fixed and other free, loaded with force at its free end. The viscoelastic material of the bar is described by fractional models (Scot-Blair, Voigt, Maxwell and Zener models). Rayleigh-Ritz and Laplace transform methods were applied to obtain closed-form solution of the considered problem.

2

Analiza teoretyczno-symulacyjna transformatora piezoelektrycznego

Łabędzki P., Pawlikowski R., Radowicz A.

Mechanik

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2016

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R. 89, nr 12

1836--1839

PL

Przedstawiono analizę teoretyczno-symulacyjną transformatora piezoelektrycznego o dowolnej konfiguracji. Poszukiwano optymalnych parametrów geometrycznych ze względu na uzyskiwane wzmocnienie napięcia. Dokonano analizy pracy transformatora przy różnych postaciach drgań własnych dla dwóch różnych materiałów.

EN

Theoretical and simulation analysis for the description of a piezoelectric transformer with respect to unrestricted configuration is developed. The working conditions of the transformer dependent on various eigen vibrations for two different kinds of material are considered and the influence of the gauge optimal parameters on a voltage amplification have been studied.

3

Dynamics of an unguided missiles launcher

Dziopa Z., Buda P., Nyckowski M., Pawlikowski R.

Journal of Theoretical and Applied Mechanics

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2015

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Vol. 53 nr 1

69--80

EN

The paper discussed the modelling, examination of the dynamic properties and stability of the WW-4 launcher of unguided short-range missiles NLPR-70. Remotely controlled armament module ZSMU-70, in the presented configuration, is designed to combat ground targets in form of light armoured vehicles. The purpose of this paper is to present a physical model, a mathematical model and computer simulation of launcher motion during launching and the first phase of flight of the missile. The virtual model is formulated in the vertical plane and verified by experimental studies. The theoretical model corresponds to experimental studies conducted at the military testing ground with application of a high-speed camera.

4

Pomiary i analiza topografii powierzchni wzorców kontrolnych typu C przeznaczonych do sprawdzania profilometrów stykowych

Kapłonek W., Łukianowicz C., Nadolny K., Pawlikowski R.

Pomiary Automatyka Kontrola

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2011

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R. 57, nr 11

1404-1408

PL

W pracy przedstawiono zagadnienia związane z analizą topografii powierzchni wzorców kontrolnych typu C (w odmianach C2 i C3) przeznaczonych do sprawdzania profilometrów stykowych. Wykazano, iż wzorce tego typu mogą być sprawdzane za pomocą aparatury pomiarowej wykorzystującej nowoczesne metody optyczne - koherencyjną interferometrię korelacyjną oraz konfokalną laserową mikroskopię skaningową. Rozpatrzenie możliwości zastosowania różnych metod umożliwia opracowanie procedur kalibracyjnych stosowanych dla urządzeń stykowych.

EN

In modern measurement technique there are used many groups of methods for assessment of geometrical structure of surface (GSS). The most important mechanical methods, which have played the predominant role for many years in this type of measurements, are the stylus methods. They are realized by stylus profilometers characterized by high accuracy and resolution as well as possibility of assessment of surface topography in 2D and 3D. To obtain a high accuracy and repeatability of measurements, the stylus profilometers should be periodically calibrated. The standard procedures include diagnostics of the general conditions of a measuring instrument as well as testing its metrological parameters. In most cases these procedures are realized by calibration specimens (material and programmable). In the paper issues related to measurements and analysis of the surface topography of calibration specimens of type C (variations C2 and C3) for calibrating the stylus profilometers are presented. It is shown that specimens of these types can be assessed by advanced measuring systems using optical methods e.g. CCI (Coherence Correlation Interferometry) and CLSM (Confocal Laser Scanning Microscopy). Consideration of the possibility of using different methods allows working out proper calibration procedures for the stylus instruments.