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| Silva,Evandro P. da; Silva,Fábio M. da; Andrade,Ednilton T. de; Magalhães,Ricardo R.. |
| ABSTRACT Coffee harvesters are subject to stresses and vibrations in their structure, originating from engines and harvesting system. These structures must be designed to avoid rupturing of the components due to fragility of the materials, inadequate geometries, or the phenomenon of resonance, which increases the displacements/deformations of the components. In this scenario, the main objective of this study is to analyse the results of stresses and displacements from two static simulations and to present results of natural vibration frequencies from two modal simulations in a self-propelled coffee harvester. For this purpose, 20 modal shapes were generated, considering coffee harvester reservoir as empty and full. The simulations were carried out using... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Design; Vibration; Resonance; Stresses; Displacements. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018000700511 |
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| Lodi,Liliane; Tardin,Rodrigo H.; Hetzel,Bia; Maciel,Israel S.; Figueiredo,Luciana D.; Simão,Sheila M.. |
| Bryde's whales, Balaenoptera edeni Anderson, 1879, were observed on 17 occasions (N = 21 surveys) in the coastal waters off Rio de Janeiro in southeastern Brazil during austral summer through autumn 2014. Five whales were individually identified using photo-identification techniques. The mean interval between resightings for all individuals was 12.8 days, with a minimum of one day and a maximum of 48 days. The comparison between the catalogs of Bryde's whales off Rio de Janeiro and the Cabo Frio region revealed matches for three individuals. The resightings show movements of up to 149.6 km along the coastal waters off the state of Rio de Janeiro. Most of the observations consisted of solitary individuals (82.3% of sightings). Feeding was the predominant... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Balaenoptera edeni; Displacements; Individual identification; Surface activities. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702015000200171 |
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