HAYM BENAROYA is a professor of mechanical and aerospace engineering at Rutgers University—New Brunswick in New Jersey; his research interests include structures and vibration, offshore structural dynamics, fluid-structure interaction, aircraft structures, and the development of concepts for lunar structures. He is the author of numerous publications, including the first four editions of this textbook. MARK NAGURKA is an associate professor of mechanical engineering at Marquette University in Milwaukee, Wisconsin.SEON HAN is an assistant professor and instructor at Texas Tech University in Lubbock.