REDUCTION OF HULL WHIPPING IN SLAMMING BY ACTIVE CONTROL SYSTEM

The reduction of hull girder whipping in slamming by an active control system is investigated. Under the consideration of hull flexibility, a mathematical formulation is developed for the whipping of a hull, subject to slamming, and including an active vibration control system consisting of a tuned mass and hydraulic servo system. Using the optimal theory, the control law of the active system is determined. In addition, a closed-loop estimator is introduced to estimate the distribution of hull motion, which is required to compute the actuator output of the active system. Finally, a numerical example of an application to a 205-ton high-speed craft is described. The results show that the whipping will be reduced significantly. The whipping acceleration and induced stress in particular are reduced more than 95% within 2 sec by this scheme.

  • Supplemental Notes:
    • J Ship Res, v 38 n 2, June 1994, p 115 [8 p, 29 ref, 2 tab, 14 fig]
  • Authors:
    • Hsueh
    • W-J
    • Lee, Brian Ho-Yin
    • Y-J
  • Publication Date: 1994

Language

  • English

Subject/Index Terms

Filing Info

  • Accession Number: 00717526
  • Record Type: Publication
  • Source Agency: British Maritime Technology
  • Files: TRIS
  • Created Date: Mar 4 1996 12:00AM