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Open access

Marek Dudziński and Marcin Kluczyk

REFERENCES Antoni, J. Daniere, J. Guillet, F. (2002). Effective vibration analysis of IC engines using cyclostationarity part I: a methodology for condition monitoring. Journal of Sound and Vibration, 257(5), pp. 815-837. Antoni, J. Daniere, J. Guillet, F. (2002). Effective vibration analysis of IC engines using cyclostationarity part II: new results on the reconstruction of the cylinder pressures. Journal of Sound and Vibration, 257(5), pp. 839-856. Carlucci, A.P. Chiara, F.F. Laforgia. D. (2006). Analysis of the relation between injection

Open access

Piotr Bielawski

-142. Bielawski, P. (2009). Condition monitoring of marine power plants. Diagnostyka 1 (49), pp. 45-48. Bielawski, P. (2011). Diagnostics of marine propeller shafts. Journal of Polish CIMAC 6 (2), pp. 31–40. Bielawski, P. (2012). Measurement and evaluation of mechanical vibration of reciprocating machines. Diagnostyka – Applied Structural Health, Usage and Condition Monitoring 1 (61), pp. 25-30. Bielawski, P. (2016a). Measures and limits of machine wear margin of production systems. Problemy eksploatacji / Maintenance Problems 1, pp. 129-139. Bielawski

Open access

Petras Dubinskas and Laimutė Urbšienė

, Singapore, No. 4, pp. 379-381. Fraser, A.S. (1957), “Simulation of Genetic Systems by Automatic Digital Computers”, Biological Science Vol. 10, pp. 484-499. Friedberg, R.M. (1958), A Learning Machine: part I, IBM 2, pp. 2-13. Friedberg, R.M., Dunham, B. and North, J.H. (1959), A Learning Machine: part II, IBM 3, pp. 282-287. Manolas, D.A., Borchers I. and Tshalis, D.T. (2000), “Simultaneous Optimization of the Sensor and Actuator Positions for an Active Noise and/or Vibration Control System Using Genetic

Open access

Andronicus Torp, Andreia Gabriela Andrei and Anca Alexandra Purcarea

References Bodanis, D. (2000). E=mc2. Haase & Søns Forlag. Boxall, P. & Purcell, J. (2011). Strategy and Human Resource Management. Palgrave Macmillan. Hawking, SW. (2010). The Grand Design. Bantam Press. London. Hunt, VV. (1996). Infinite mind: The Science of Human Vibrations of Consciousness. Malibu Publishing Co. Hunter, J.E., & Hunter, R.F. (1984). Validity and Utility of Alternative Predictors of Job Performance. Psychological Bulletin. Vol. 96. No. 1

Open access

Lucian T. Mândrea, Ioan I. Curta and Zoltan Z. Marosy

. Dobson P., O’Keffe E. (2000) Investigations into Stress and it’s Management using the Gas Discharge Visualization Technique, International Journal of Alternative and Complementary Medicine, June 2000. Dumitrescu, F.I. (1979) Electronografia - Metode electronografice în biologie, Electronography - Electronographic Methods in Biology, Editura Ştiinţifică şi Enciclopedică, Scientific and Encyclopedic Publishing House, Bucharest. Gerber, R. (2005) Medicina vibraţională, The Vibration Medicine, Editura Elit, Elit Publishing House, ISBN 973

Open access

Krzysztof Kotwica and Paweł Sienkiewicz

Abstract

The paper presents a new solution of a mining head for roadheader designed for hard and very hard rock mining. The mining head was equipped with mini disk tools with a complex trajectory. The results of field tests were presented, under which the effectiveness of the new mining head solution was observed. The load and vibrations of the mining head, dustiness and grain size of the excavated material as well as disk tool wear were measured. These tests were carried out for various constructional and material parameters of the used asymmetrical mini disk tools and kinematic parameters of the mining head.

Open access

Adam Szeleziński, Adam Muc and Lech Murawski

Abstract

The paper presents a comparative analysis of non-destructive testing methods used in the assessment of welded joints. The authors describe the methodology of conducting tests on welded plates using the vibration method. On the basis of the FFT analysis of responses from accelerometers, spectral characteristics were calculated, and then used along with statistical measures to develop a comparative method in non-destructive testing of welded joints. This method will make it possible to quickly and easily distinguish plates with non-defective welded joints from plates with faulty welds. The paper presents test results for a non-defective plate weld (sample no. 2202), a plate with defective edge fusion (sample no. 2127) and one with a cracking along the entire sample length (sample no. 2132). The article points out the limitations of the proposed method and the need for further research

Open access

Patrycja Pawłowska, Zbigniew Matuszak, Katarzyna Sosik and Mária Chovancová

Abstract

Vulcanised rubber as a complex system is made from the basic component being virgin rubber and various components amounting to 10-15 per cent or even more. The material gains its most valuable properties in the final phase of processing i.e. vulcanisation. In mechanical as well as automotive engineering it is important for vulcanised rubber to be resistant to grease, oil and fuel in high operating temperatures. Being one of the very valuable isolation materials, vulcanised rubber is also characterised by dielectric and elastic properties as well as distinguished resistance to operating conditions (high/low temperature, weather conditions). All the above mentioned applications of vulcanised rubbers are also found in the shipyard industry. Their use is also very much predicated on the properties such as: ability to attenuate mechanical vibrations, high elasticity, considerable elastic deformability under static and dynamic loads, low permeability of water and gas, resistance to various chemicals, and other. The purpose of this article was to determine the hardness of vulcanised rubber samples obtained from various places on the “Izabel” inland barge. The scope of the study covered sampling and preparing the samples for testing (i.e. cleaning and degreasing the samples). Then, the hardness of the samples was measured using the Shore hardness test. The first part of the article presents the general concept of vulcanised rubber, its main components, properties, applications, and ageing. The second part focuses on the research scope and measuring the hardness of vulcanised rubber samples obtained from the “Izabel” inland barge.

Open access

Artur Bejger and Jan Drzewieniecki

REFERENCES Bejger A. (2012). Zastosowanie fal sprężystych emisji akustycznej do diagnozowania układów wtryskowych okrętowych silników spalinowych. FOTOBIT, Kraków. Holroyd T. (2000). Machine & Systems Condition Monitoring Series. Acoustic Emission & Ultrasonics, Coxmoor Publishing Company’s, Oxford UK. Goldman S. (1999). Vibration Spectrum Analysis. A Practical Approach. Industrial Press Inc. New York. Lalanne Ch. (2009). Random Vibration, John Wiley & Sons, Inc. ISTE Ltd. Suzuki H., Kinjo T., Hayashi Y., Takemoto M., Ono K

Open access

Tomasz Lus

REFERENCES Haller, C.L., Kelleher, E. (2000). Practical Integrated Maintenance and Diagnostics for Medium and Slow Speed Diesel Engines. SNAME ASNE SMPE, Alexandria, VA, USA. Klockars, T., Eykerman, A., Mayr, I. (2010). Making the most of perfect maintenance timing, indetail, Wärtsilä Technical Journal, 01.2010, pp. 57-60, Finland. Lus, T., Łutowicz, M. (2010). Preliminary tests of envelope vibration diagnostic method on marine high-speed diesel engine. Research papers of IAg Eng LUA & LU of Ag, vol 41, no 1-2, pp. 86-97, Lituania. McNeill