Wyniki wyszukiwania - BazTech

1

Cargo securing – comparison of the selected trucks

Vlkovský Martin, Veselík Petr

Transport Problems

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2020

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T. 15, z. 4, cz. 2

265--274

EN

The paper deals with a comparison of shocks (values of acceleration coefficients and inertial forces) of two types of vehicles (T-810 and T-815 MK IV) during transport experiments on a motorway. The measurement was performed using an OM-CP-ULTRASHOCK-5 three-axial accelerometer with a datalogger and calibration certificate. The goal of the paper is to accept or reject a hypothesis of the existence of a statistically significant difference between the values of the acceleration coefficients generated by the two vehicles. The statistical analysis of the measured data was done with use of two parameters. The results of the analysis show statistically significant differences between the examined vehicles. Based on the performed statistical analysis, the effect on cargo securing is demonstrated.

2

Lengthwise finning surface as the method of influence on the flow separation in diffusers

Zaryankin A., Rogalev A., Lisin E., Khudyakova V.

Journal of Applied Mathematics and Computational Mechanics

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2017

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Vol. 16, nr 1

127--138

EN

The paper deals with the analysis of power factors acting within the boundary layer for different types of flow: convergent, gradientless and diffuser. Based on the considered formation mechanism of boundary layer separation, a hypothesis about the possible influence on structure and character of a separated flow by changing the gradient of the tangential stresses in the boundary layer was proposed. This impact is proposed to realize by means of the longitudinal finning of diffuser. Verification of the concept is performed on the basis of numerical flow investigation and available experimental data.

3

Poprawa warunków formowania wstęgi papieru poprzez umiejętne wykorzystanie sił bezwładności

Głowacki K.

Przegląd Papierniczy

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2016

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R. 72, nr 12

737--738

4

Dynamic characteristics measurements of a force transducer against small and short-duration impact forces

Djamal M., Watanabe K., Irisa K., Prayogi I. A., Takita A., Yamaguchi T., Fujii Y.

Metrology and Measurement Systems

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2014

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Vol. 21, nr 1

59--66

EN

A method for evaluating the dynamic characteristics of force transducers against small and short-duration impact forces is developed. In this method, a small mass collides with a force transducer and the impact force is measured with high accuracy as the inertial force of the mass. A pneumatic linear bearing is used to achieve linear motion with sufficiently small friction acting on the mass, which is the moving part of the bearing. Small and short-duration impact forces with a maximum impact force of approximately 5 N and minimum half-value width of approximately 1 ms are applied to a force transducer and the impulse responses are evaluated.

5

Analysis of piston-crank system balancing in V-VR engines

Wierzbicki S.

Journal of Polish CIMAC

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2012

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Vol. 7, no 2

235-242

EN

The advances made in materials science and modern material production and processing technologies support the design and serial production of structural solutions which could not have been applied in the past on account of their complexity or high cost. The piston-crank system of a combustion engine remained practically unchanged over decades, and the only structural modifications involved the use of new materials for improved fatigue strength or attempts to limit the mass of system components to minimize inertial forces. Since the invention of the piston engine, in-line engines have been the predominant type of engine configuration on the market. Larger engines are built sporadically, and most of them have a "V" arrangement of cylinders and pistons for easier mounting. Selected vehicles, in particular sports cars, are equipped with boxer-type piston-crank systems. Recent years have witnessed the advance of new engine configurations with VR or V-VR piston-crank systems which are often referred to as W engines due to a unique arrangement of the connecting rod. The V-VR crankshaft-piston configuration supports the design of engines characterized by high displacement and reduced size for easier assembly in the vehicle's engine compartment. Such solutions are often deployed in upper class cars. There is a general scarcity of information about V-VR piston-crank systems in literature, therefore, this study presents an overview of the above configuration and analyzes inertial forces impacting the discussed system.