Marcondes, Vera Lia [UNESP]De Almeida, Criscuolo [UNESP]De Oliveira, Antonio Marmo2014-05-272014-05-271999-12-01Revista Brasileira de Ciencias Mecanicas/Journal of the Brazilian Society of Mechanical Sciences, v. 21, n. 4, p. 713-721, 1999.0100-7386http://hdl.handle.net/11449/65974A study was developed in order to build a function M invariant in time, by means of Hamiltonian's formulation, taking into account the equation associated to the problem, showing that starting from this function the equation of motion of the system with the contour conditions for non-conservative considered problems can be obtained. The Hamiltonian method is extended for these kind of systems in order to validate for non-potential operators through variational approach.713-721engEquations of motionMathematical modelsMathematical operatorsProblem solvingVariational techniquesHamiltonian methodNon-potential operatorsMechanicsArtigo10.1590/S0100-73861999000400013S0100-73861999000400013Acesso aberto2-s2.0-0342960890