Linear PDE governing small-amplitude displacement u in an isotropic elastic solid: ρ ∂²_t u = (λ + μ) ∇(∇·u) + μ Δu. Predicts longitudinal (P) and transverse (S) waves.
Linear PDE governing small-amplitude displacement u in an isotropic elastic solid: ρ ∂²_t u = (λ + μ) ∇(∇·u) + μ Δu. Predicts longitudinal (P) and transverse (S) waves.