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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

[en] THEORETICAL AND EXPERIMENTAL STUDY ON INTERNAL BALLISTICS / [pt] ESTUDO TEÓRICO-EXPERIMENTAL EM BALÍSTICA INTERNA

UBATAN GOMES GURGEL 16 March 2018 (has links)
[pt] Analizam-se os principais métodos de Cálculo para determinação dos parâmetros do tiro, segundo modelos que consideram exclusivamente a variação temporal das variáveis envolvidas. Aplicam-se os métodos selecionados a exemplos de tiros reais. Comparam-se resultados teóricos com experimentais. Apontam-se as principais dificuldades relativas a obtenção dos dados relativos às características termodinâmicas e balísticas dos propelentes, determinadas nos testes de bomba manomêtrica. Aplicam-se os conceitos de função de forma geométrica e de vivacidade dinâmica dos propelentes comprovando-se a validade de ambos na previsão dos resultados de tiros. / [en] The principal methods of calculation of the parameters from the shot are analysed, according to models that take into consideration exclusively the time variation of the envolved variables. The selected methods are applied in real shots examples. Experimental and theoretical results are compared. The main difficulties concerning the obtention of data of thermodynamics and ballistics characteristics of the propellants are pointed out through tests developed in manometrics bombs. The concepts of geometric form function and dynamic vivacity of propellants are applied, conforming the validity of both to forecast the effects of the shots.

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