SciELO - Scientific Electronic Library Online

 
vol.11 número14Global optimal path planning of an autonomous vehicle for overtaking a moving obstacleA robust triangular membrane element índice de autoresíndice de assuntospesquisa de artigos
Home Pagelista alfabética de periódicos  

Serviços Personalizados

Journal

Artigo

Indicadores

Links relacionados

Compartilhar


Latin American Journal of Solids and Structures

versão On-line ISSN 1679-7825

Resumo

VAKILABADI, Karim Akbari; KHEDMATI, Mohammad Reza  e  SAYYARI, Habiballah. Analysis of the flexural mode response of a novel trimaran by segmented model test. Lat. Am. j. solids struct. [online]. 2014, vol.11, n.14, pp.2573-2588. ISSN 1679-7825.  https://doi.org/10.1590/S1679-78252014001400003.

A novel ship concept design is significantly an "adhoc" process. In the preliminary design stage of novel vessels, it is very important to be able to develop an initial estimate of the effects of stiffness and mass distribution on the longitudinal flexural natural frequencies due to different general arrangements in still water at zero speed to satisfy design specifications. For new emerging designs, this estimate has to be made based on a model test. The experiments should also be planned so that scales effects and other features that are not present in full scale case, are minimized. A model with a length of 1.5 meter has been selected. The model was cut into four segments longitudinally and connected by a backbone beam with three elastic hinges joining the four segments. Wet vibration tests were conducted on the model, showed significant influences on the flexural natural frequencies through variations in stiffness and different mass distributions. The whipping frequency was calculated with four degrees of freedom theoretical model to compare with the experimental results. The theoretical model shows a good agreement with the experimental results.

Palavras-chave : Novel Trimaran; segmented model; elastic hinge; natural frequency; model test.

        · texto em Inglês     · Inglês ( pdf )

 

Creative Commons License Todo o conteúdo deste periódico, exceto onde está identificado, está licenciado sob uma Licença Creative Commons