The dynamic stability of a cantilevered beam actuated by a nonconservative follower force has previously been studied for its interesting dynamical properties and its applications to engineering designs such as thrusters. However, most of the literature considers a linear model. A modest number of papers consider a nonlinear model. Here, a system of nonlinear equations is derived from a new energy approach for an inextensible cantilevered beam with a follower force acting upon it. The equations are solved in time, and the agreement is shown with published results for the critical force including the effects of damping (as determined by a linear model). This model readily allows the determination of both in-plane and out-of-plane deflections as well as the constraint force. With this novel transparency into the system dynamics, the nonlinear postcritical limit cycle oscillations (LCO) are studied including a concentration on the force which enforces the inextensibility constraint.
Nonlinear Response of an Inextensible, Cantilevered Beam Subjected to a Nonconservative Follower Force
Contributed by the Design Engineering Division of ASME for publication in the JOURNAL OF COMPUTATIONAL AND NONLINEAR DYNAMICS. Manuscript received September 10, 2018; final manuscript received December 5, 2018; published online January 11, 2019. Assoc. Editor: Mohammad Younis.
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McHugh, K. A., and Dowell, E. H. (January 11, 2019). "Nonlinear Response of an Inextensible, Cantilevered Beam Subjected to a Nonconservative Follower Force." ASME. J. Comput. Nonlinear Dynam. March 2019; 14(3): 031004. https://doi.org/10.1115/1.4042324
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