2.波动方程及其解 di Ou 1 O2u aa 8t a =Co =LoCo 1 821 dx t u=Lodx +2u+ u d 8x dx i=Codx +i+ -dx Lodx Lodx i+ -dx 8t Ex +YY C.dx Codx 8 2. 波动方程及其解 波动方程及其解 ⎪⎪⎩ ⎪⎪⎨⎧ ∂ ∂ = ∂ ∂ − ∂ ∂ = ∂ ∂ − t u C x i t i L x u 0 0 ⎪⎪⎩ ⎪⎪⎨⎧ ∂ ∂ = ∂ ∂ = ∂ ∂ ∂ ∂ = ∂ ∂ = ∂ ∂ 2 2 2 2 2 2 0 0 2 2 2 2 2 2 2 0 0 2 1 1 t i t v i L C x i t u t v u L C x u ⎪⎪⎩ ⎪⎪⎨⎧ ∂ ∂ + + ∂ ∂ = ∂ ∂ + + ∂ ∂ = dx x i i t u i C dx dx x u u t i u L dx 0 0