According to Collins Dictionary, “Modal analysis is the analysis of a structure to find its natural frequencies of vibration” and it is the task of modal analysis to determine a system’s different modes of vibration”. Its core concept is the description of the dynamic behavior of a given structure in terms of the natural vibration modes of the structure. This description, or model, is equivalent to the Analytic Dynamics, or Geometrical, Model or to the Time Domain description. It is certainly one of the most useful approaches of structural dynamics. It is used in several fields, including Structural Health Monitoring & Damage Detection, Structural Modification, Solid-Fluid Interaction & Flutter Analysis, Fatigue Testing and Material Characterization. In this lecture, an overview of Modal Analysis, including Experimental Modal Analysis, will be presented. Within this framework, some of its characteristic techniques and tools, as well as some of the ongoing research in this field will be addressed. Finally, some research and industrial examples will be referred.


António Ribeiro has a graduation, a master and a doctorate in Mechanical Engineering at Institute Superior Tecnico in the university of Lisbon. He is an assistant professor at Instituto Superior Tecnico in the Mechanical Design and Structural Materials scientific area, being responsible for and teaching courses in the ‘Mechanical Engineering” and ‘Engineering Design and Advanced Manufacturing’ graduations and post-graduations. During his career he has participated and/or coordinated several national and European R&D projects in collaboration with different industrial sectors, from railway to defense and aeronautics, mainly related to the structural vibrations, human-machine interfaces and management of complex design processes. His scientific interests include Holistic Design, Ethics in Engineering and Higher Education Innovation, among others. He has a large number of scientific and technical publications in national and international conferences and journals. His extra-academic interests range from History and Anthropology to outdoor activities and strategy games.