Abstract
This article develops a novel curved surface-based vibration isolation mechanism for the parametric design of stiffness characteristics, which consists of double linking rods, a coil spring, roller cam followers and curved surfaces. The general modeling derived from Lagrangian dynamics provides design guidance for implementing on-demand stiffness characteristics, such as quasi-zero stiffness, or absolute-zero stiffness in its special situation. The design methodology is then utilized to isolate severe vibrations. In theory, deterministic averaging is applied to predict the dynamical responses to harmonic excitations and evaluate its dynamical characteristics and transmissibility. An experimental platform is built, and vibration tests are conducted to verify the isolation performance. Systematic investigation uncovers prominent design of stiffness and an excellent ultralow frequency performance for vibration isolation.
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