文章摘要
胡明,何其渝,董初生,蒋念涵.围网渔船作业时的起网力矩及横摇计算[J].水产学报,1994,18(2):101~109
围网渔船作业时的起网力矩及横摇计算
THE CALCULATION FOR HAULING MOMENT AND ROLLING OF PURSE SEINER DURING THE PROCEDURE
投稿时间:1993-09-08  修订日期:1993-01-01
DOI:
中文关键词: 围网渔船  起网力矩  横摇  稳性  计算
英文关键词: purse seiner  hauling moment  rolling  stability  calculation
基金项目:
作者单位
胡明 上海水产大学, 200090 
何其渝 上海水产大学, 200090 
董初生 上海水产大学, 200090 
蒋念涵 上海水产大学, 200090 
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中文摘要:
      本文在实船测试的基础上,将渔船绞纲起网时的括纲视作一种呈悬链线状的柔索,由此求解产生于绞纲结束阶段的最大倾侧力矩和张力的方向角,同时考虑力的作用点位置等因素,推导出较为简化的最大倾侧力矩公式.起网时的横摇计算,应用了脉冲响应法求解横摇运动方程.在作计算修正时,还引入了横摇质量惯性矩Ix的修正系数C1和网具尺度比的修正系数C2.实例计算结果颇为满意.最后作者指出在风浪扰动力矩作用下,绞纲起网时,横摇幅值有成倍的增加,甚至出现危险情况.起网力矩和横摇角的公式计算法,对研究和设计围网渔船及其稳性校核很重要,并有益于进一步修订渔船稳性规范.
英文摘要:
      Based on the data of realtime records the tensile directions na-mely the angle between the tension line and the vertical line, while the inclining moment is up to the maximum which normally occurs in the end of hauling,are-analyzed, when and the purse-line is supposed as a suspended flexible wire in the water during hauling. On account of the amount and the point of tension and other factors,a simplified formula of maximum inclining moment is derived.The rolling of seiner is calculated with the impulse response method according to the rolling equation. For different size of vessels and net specifications,the adjustment coefficients,C1 and C2,are introduced into vessel's inertia moment.of the mass for rolling and for net specifications respectively in the calculation. In practice, the results from calculation are satisfactory. In this paper, it has indicated that rolling amplitude will increase many times if the fishing vessels are effected by the moments caused by wind and/or wave during hauling, and the vessels might be in danger. The calculation as mentioned about is practically significant in the designing of purse seiner and the checking of its stability. This method provides a basis for the further modification and adjustment of tha Rules for stability of fishing vessels.
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