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Volume 25 Issue 新刊5
 
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Article Navigation >  Journal of Unmanned Undersea Systems  > 2017  >  25(新刊5): 453-458
WANG Sheng, YIN Shao-ping, WANG Zhong, GUO Jun, ZHANG Zhi-min. Study on Modal Characteristic of Torpedo's Wedge-ring Connection Structure[J]. Journal of Unmanned Undersea Systems, 2017, 25(新刊5): 453-458. doi: 10.11993/j.issn.2096-3920.2017.05.010
Citation: WANG Sheng, YIN Shao-ping, WANG Zhong, GUO Jun, ZHANG Zhi-min. Study on Modal Characteristic of Torpedo's Wedge-ring Connection Structure[J]. Journal of Unmanned Undersea Systems, 2017, 25(新刊5): 453-458. doi: 10.11993/j.issn.2096-3920.2017.05.010
shu

Study on Modal Characteristic of Torpedo's Wedge-ring Connection Structure

doi: 10.11993/j.issn.2096-3920.2017.05.010
  • 1.

    The 705 Research Institute, China Shipbuilding Industry Corporation, Xi′an 710077, China

  • 2.

    Science and Technology on Underwater Information and Control Laboratory, Xi′an 710077, China

  • Received Date: 2017-06-08
  • Rev Recd Date: 2017-07-14
  • Publish Date: 2017-12-20
    Abstract
  • To solve the problem that in the free modal test of whole torpedo, the wedge-ring connection stiffness imposes different influences on its modal frequencies, this paper studies the nonlinear characteristic in free boundary condition, and analyzes the modal characteristic based on modal sensitivity. Finite element simulation and free modal test under different exciting forces are conducted to reveal the modal characteristic. The result shows that with the increase of the exciting force, the torpedo cabin shell’s modal frequency and the contact stiffness of the wedge-ring connection structure decrease with obvious nonlinear characteristic; For the same order of modal frequency, the higher the sensitivity of modal frequency to connection stiffness is, the greater the influence of connection stiffness change on modal frequency becomes. This research may provide a reference for designs of torpedo′s shell structure and environmental adaptability.

     

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