TY JOUR TI Multi-layer protective structure printed on a construction 3D printer. Physics of elastic wave passing through it KW multilayer structure KW energy absorption KW elastic waves KW impedance,attenuation KW fiber JO Construction and Architecture AU Sycheva, A.M. AU Nesterov, O.S. AU Shashkov, A.I. AU Morozov, I.S. PY 2025 IS PB Publishing Center RIOR