Natural frequencies and modes Finite element method 6 Bolted joints 5 Experimental modal analysis 5 Modal analysis 5 Bolts 4 Finite element modelling 4 Assembled structures 3 Finite-element model updating 3 Natural frequencies 3 Damage detection 2 Dynamic behaviours 2 Free boundary conditions 2 Mechanical joints 2 Stiffness 2 Structural analysis 2 Surface properties 2 3D modeling 1 Automotive industry 1 Binary alloys 1 Bismuth alloys 1 Commercial software 1 Comparative evaluations 1 Computational time 1 Damage assessments 1 Damaged structures 1 Degrees of freedom (mechanics) 1 Drops 1 Dynamic behaviour 1 Dynamic characteristics 1