Technical Notes Dynamic Characteristics Prediction of Large Structures by Component Modal Tests
K = stiffness matrix K = reduced stiffness ~ Kt = stiffness matrix of tested component with n additional stiffnesses M = mass matrix M = reduced mass ~ Mt = mass matrix of tested component with n additional masses n = number of mass and stiffness additive coordinates R = transformation vector x = displacement vector α = weighting coefficient ΔK = additional stiffness ΔM = additional mass σ = frequency used in finding additional mass and stiffness ω = angular frequency