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Spring 2003 Generalized forces revisited Derived Lagrange s equation from d'Alembert's equation ∑m(8x+16y+22)=∑(Fx+F+F。=) Define virtual displacements sx Substitute in and noting the independence of the 8q,, for each

一、基本概念 Fourier级数定义:设f(x)是(-∞,+∞)上以2为周期的函数,且f(x)在[-n,]上绝对可积,称形如

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