a nuclear power plant. Weintroduce a perfectly matched layer (PML) wave-absorbing boundary to limit ... emi-discrete form with symmetric damping and stiffness matrices. The transient elastic wave equations ... to a full-waveform inversion approach for characterizing cavities inside a containment wall. 한국전산구조공학회 한국전산구조공학회논문집 김은영, 김보영, 강준원, 이홍표