WANG Xueliang, GU Xuekang, HU Jiajun. 船体梁刚度对波激振动影响的比较研究[J]. Chinese Journal of Ship Research, 2016, 11(5): 55-62,77. doi: 10.3969/j.issn.1673-3185.2016.05.009
Citation: WANG Xueliang, GU Xuekang, HU Jiajun. 船体梁刚度对波激振动影响的比较研究[J]. Chinese Journal of Ship Research, 2016, 11(5): 55-62,77. doi: 10.3969/j.issn.1673-3185.2016.05.009

船体梁刚度对波激振动影响的比较研究

doi: 10.3969/j.issn.1673-3185.2016.05.009
  • Received Date: 2015-10-22
  • Publish Date: 2016-09-30
  • 船舶大型化发展的趋势使得其尺度越来越大,而结构轻量化设计的需求则使高强度钢被大量应用于其结构设计之中,相对于传统的小尺度船舶,相对刚度的下降使得船体梁变得越来越“软”,这将导致大型船舶在波浪中航行时船体结构波激振动特性发生变化。采用模型试验和理论预报的方法,研究某大型工程船在不同船体梁刚度下的低频和高频垂向波浪载荷响应。分段试验模型采用2种横剖面惯性矩的钢质梁,用以分别模拟船舶横剖面原始的和变化后的刚度。采用三维水弹性理论对该船在波浪中的响应进行预报,并与模型试验结果进行比较。结果显示:小刚度的船体梁更易在波浪中发生波激振动;频繁的波激振动将导致结构发生严重的疲劳损伤问题。这种刚度变化对船体梁波激振动的影响规律表明,有必要将刚度作为大型船舶结构优化设计的重要参数之一。

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