Study of Propeller Blade Stresses and Bearing Forces on a High-Speed Twin-Screw Container Ship

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  • 2軸超高速コンテナ船のプロペラ翼応力とベアリングフォースに関する研究
  • 2ジク チョウコウソク コンテナセン ノ プロペラヨク オウリョク ト ベアリ
  • 2軸超高速コンテナ船のプロペラ翼応力とベアリングフォースに関する研究(第一報 : 静的応力について)
  • 1 st Report, Statical Stress
  • 第一報, 静的応力について

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With larger and higher-powered ships, “Wide Bladed Propeller” has recently come into use along with multiple shafts as a countermeasure to cavitation erosion due to increased propeller loads. As a result, shaft alignments including propeller shaft bearings in bossings also have become a important design subject for marine engineers.<BR>In order to evaluate the propeller bearing forces, a computer program has been developed at the Ship Research Institute of Japan using non-steady lifitng-surface propeller theory. Although the results computed by the program showed good agreement with measured model propeller forces, they have not been verified for operating full-scale propellers.<BR>It is hardly possible to measure the propeller bearing forces directly. By virtue of the above mentioned program, however, the bearing forces can be checked by measuring the bending stresses on a full-scale propeller blade according to the process shown in Fig. 1.<BR>In this report the statical stress analysis for the propeller blade of a twin screw container ship of 80, 000 SHP, supposed to be operating in a circumferentially mean wake, is presented along with stress measurements obtained on a 114 scale propeller.<BR>In the second report, these data are to be compared with the actual fluctuating blade stresses measured on full scale.

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