Abstract
The points of view of Hamilton, Lagrange, Gauss, Hertz, and Lord Rayleigh emphasized the concept of energy rather than force. The equations of motion of the system are not derived by consideration of equilibrium of forces acting on the system, possibly including the Newtonian and d’Alambert inertia forces. Instead, the primary role is played by energy considerations. As an example of such an approach, a condition of stable equilibrium under static loads is replaced by the condition of a local minimum for the potential energy of a mechanical system. Instead of solving the equations of motion of a vibrating system to find its natural frequencies, it is possible to consider the mean values of potential and kinetic energies, or to minimize an appropriate energy functional.
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© 1986 D. Reidel Publishing Company
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Komkov, V. (1986). Energy Methods, Classical Calculus of Variations Approach — Selected Topics and Applications. In: Variational Principles of Continuum Mechanics with Engineering Applications. Mathematics and Its Applications, vol 24. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-4564-7_2
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DOI: https://doi.org/10.1007/978-94-009-4564-7_2
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