Design of Bow Absorber for Vibration Reduction of Hull Girders

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概要

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• An active bow absorber for vibration reduction of hull girders is presented. In this investigation, the chain locker of ships is designed as the tuned mass of the absorber, which is driven by a hydraulic system. Since the chain locker is very heavy, the absorber will have a high efficiency for vibration reduction. Including the dynamics of the hydraulic system, the control law of the absorber is derived basing on the optimal control and optimum estimation theory. Finally, frequency and time response are considered for a bulk carrier to understand the feasibility of this design. From the simulations, we find the bow absorber is highly effective for vibration reduction of hull girder due to main engine excitation, especially for the lower frequency mode, such as v-2, v-3 and v-4 modes. The required hydraulic force and the displacement of the actuator for reducing the resonance exciting are reasonable. The results also show the effect of vibration suppression by the bow absorber is similar to that by the stern absorber even for the excitation in stern.

• 社団法人日本船舶海洋工学会の論文

著者

• Lee Ya-jung

  Department Of Naval Architecture And Ocean Engineering National Taiwan University

• Hsueh Wen-jeng

  Department Of Naval Architecture And Ocean Engineering National Taiwan University

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