Studies on collision-protective structures in nuclear powered ships

  • Akita Y
  • Ando N
  • Fujita Y
 et al. 
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Abstract

For the purpose of obtaining design formulae of collision-protective side structures installed in nuclear powered ships, various series of tests and theoretical analyses were carried out. Fracture types of side structures could be grouped into two types such as deformation and crack ones. Discrimination of fracture, estimation of load, and absorbed energy against penetration depth were formulated. The dynamic effects could be explained well with the rise of yield stress of steel. Relationship between added mass of water and elapsed time of collision was analyzed. The influence of the strength of a stem of striking ship could be examined with strength ratio of stem to side structure and semi-experimental formulae of the energy absorption were obtained. The influence of the stem angle and penetration angle to the energy absorption was clarified to be small. The condition of the side structures required to have large absorbed energy was discussed using the model tests of various side structures. © 1972.

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Authors

  • Yoshio Akita

  • Noritaka Ando

  • Yuzuru Fujita

  • Katsuhide Kitamura

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