MODAL v7n4 - An Advanced Model for Stinger Force, Motion and Energy Transmissibilities

ABSTRACT

A longitudinal bar model that includes both stinger elastic and inertia properties is used to analyze the stinger's axial dynamics. Stinger motion and force transmissibilities, axial resonance, and excitation energy transfer problems are discussed. Results show that the peaks of the force and motion transmissibilities are closely related to the resonances and antiresonances of the test structure and the stinger-structure systems. The ability of the stinger to transfer excitation energy is mainly dependent on the ratio of the stinger's stiffness to the structure's driving point dynamic stiffness. Two structures that consist of a rigid mass and a double cantilever beam are chosen for numerical examples to illustrate the stinger's axial transmissibilities.