Topics in Modal Analysis, Volume 7:  Proceedings of the 31st IMAC, A Conference and Exposition on Structural Dynamics, 2013, the seventh volume of seven from the Conference, brings together contributions to this important area of research and engineering. The collection presents early findings and case studies on fundamental and applied aspects of Structural Dynamics, including papers on: Fluid Structure InteractionAdaptive StructuresExperimental TechniquesAnalytical MethodsDamage DetectionDamping of Materials & MembersModal Parameter IdentificationModal Testing MethodsSystem IdentificationActive ControlModal Parameter EstimationProcessing Modal Data