Wyniki wyszukiwania - BazTech

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Analiza sztywności kompensatora gumowego z wykorzystaniem metody elementów skończonych oraz badań doświadczalnych

Jaszak P., Skrzypacz J., Adamek K., Myjak P.

Elastomery

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2018

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T. 22, nr 1

51--65

PL

W pracy przedstawiono właściwości mechaniczne gumy EPDM i NBR o twardości 65 °ShA. Rezultaty w postaci jednoosiowego i dwuosiowego rozciągania stanowią niezbędne dane do przeprowadzenia analizy numerycznej odkształcenia elementów wykonanych z gumy. Do zaprojektowania kompensatora o zwiększonej wytrzymałości wykorzystano analizę numeryczną, bazującą na metodzie elementów skończonych. Numeryczny model kompensatora poddano złożonemu obciążeniu, wyznaczając sztywność w danym kierunku osi oraz dopuszczalne naprężenia gwarantujące bezawaryjną eksploatację kompensatora.

EN

The paper presents the mechanical properties of the NBR and EPDM 65 Shore A hardness rubber. The results in the form of uniaxial and biaxial tension are necessary data to preform numerical analysis of the elements made of rubber. To design of the rubber expansion joint with increased strength the numerical analysis based on finite elements method was used. The numerical model of the rubber bellow subjected to complex load as results determined stiffness in different axial direction as well as permissible stress guarantying its failure-free exploitation.

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Monitoring of historical land use changes caused by underground mining in Miedzianka town, based on a webgis tool and InSAR observations

Tama A., Adamek K., Pargieła K., Ochałek A., Krawczyk A., Lupa M.

Czasopismo Inżynierii Lądowej, Środowiska i Architektury / Journal of Civil Engineering, Environment and Architecture

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2018

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z. 65, nr 1

127--140

EN

The article presents land surface changes caused by historical mining of metal ores on in the country town of Miedzianka in Lower Silesia, Poland. From the 19th until the middle of 20th century, mining in Miedzianka was in depression. Due to long-term and widespread mining activity, the town almost completely disappeared. The scale of the devastating effects of the mining appeared on the surface of the land, which led to the decision to abandon Miedzianka. Despite the damage the local authority made efforts to renew regional tourism. Unfortunately, it is impossible to carry out revitalization without recognizing the current threat of postmining excavations. Therefore, the authors focused on analyzing collected archival documentation to understand the mining processes that have occurred and may still be occurring under the surface. The archival maps presented in the article have been indicated land use changes from 1886 to 1951. The current situation display WMS layer from Geoportal website. The collected materials allowed the spatiotemporal changes that occurred in Miedzianka to be presented. Additionally, the information base has been enriched with InSAR results for monitoring terrain deformation. The observations demonstrate that the biggest changes have taken place before 1936. In addition, current urban development constitute less than 25% of historical buildings. Analysis of InSAR method indicate that the research area require more accurate technique, because of the occurrence of large number of agricultural and forest areas.

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Szlaki w nieznane

Adamek K.

Geodeta : magazyn geoinformacyjny

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2017

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nr 7

44--46