M ODELING AND S EMIACTIVE D AMPING OF S TAY C ABLES Greg
نویسندگان
چکیده
Long cables, such as are used in cable-stayed bridges, are prone to vibration due to their low inherent damping characteristics. Several studies have investigated the use of an optimal viscous damper attached transversely to dampen such vibration. This paper investigates the potential for improved damping using a semiactive device. The equations of motion of the cable/damper system are reviewed and an improved modeling formulation is introduced to dramatically reduce computational burden. The response of a cable with linear viscous, active, and semiactive dampers is studied. A semiactive damper is found to decrease response by 51% compared to the optimal linear viscous damper, thus demonstrating the efficacy of a semiactive damper for absorbing cable vibratory energy.
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