摘要我国为发展海洋力量，建设海洋强国，在近些年来，越来越注重对船舶辅助设备的发展。船锚就是非常重要的船舶辅助设备，船锚的种类多种多样，其中船用大抓力锚的抓力为普通有杆锚的两倍以上，广泛应用于各类大型船只。船锚样式虽然很多，但是都各有优缺点，本文将要介绍一款自行开发的船用大抓力锚，并对该大抓力锚的强度和疲劳特性进行计算。AC-14大抓力锚是世界公认性能良好的大抓力锚之一，以重量为9675Kg的AC-14大抓力锚为原始模型，收集和分析已有船锚的结构优势，结合自己的创新开发出一款新型船用大抓力锚。并根据规范GB/T 548-1996《锚技术条件》中锚的拉力试验原理，建立该锚的受力分配模型，再结合有限元分析对其进行静力学分析、疲劳分析。结果表明，新型大抓力锚的最大应力出现在锚与锚干接触处，为100。8MPa，小于材料的屈服极限230 MPa；新型大抓力锚的最大位移出现在锚干底部处，为1。582mm，此值相对于锚的体积而言较小；新型大抓力锚中锚的疲劳寿命8。104×次，锚杆的疲劳寿命为9。056×次，属于高周疲劳。所以该大抓力锚的结构强度、刚度、寿命均满足船舶的使用要求。82149

毕业论文关键词：船用大抓力锚、结构优化设计、静力学分析、疲劳寿命计算

Abstract In recent years, according to the policy of developing maritime strength and enhancing maritime sovereignty, our country laid more emphasis on the development of marine auxiliary equipment。 Among various kinds of auxiliary equipment, anchor is one of the most important equipment and there is a great persity of anchor。 The high holding power anchor is one of the anchors。 It has more than double the holding power than the stocked anchor and it is widely applied in many large-scale ships。

Although there are many kinds of anchor, each anchor has its relative merits。 This essay will introduce a high holding power anchor which is exploited autonomously。 Also this essay will calculate the intensity and fatigue properties of this high holding power anchor。 The high holding power anchor AC-14 is one of the best high holding power anchors and is admitted widespread。 In this essay, the original model is the high holding power anchor AC-14 with 9675kg。 By collecting and analyzing the structural advantage of existed anchors, this newly developed high holding power anchor was initiated。 Also, according to the tensile force test principle introduced standard GB/T 548-1996 <anchor technology condition>, the force distribution model was created and was analyzed by static analysis and fatigue analysis。 The results illustrate that the maximum stress was appeared at the first catch between anchor and anchor shank。 The maximum stress reaches at 100。8MPa which is less than the yield limit 230 MPa。 The maximum displacement is appeared at the bottom of anchor shank, which reaches at 1。582mm。 This value is relatively small for the volume of anchor。 The fatigue lifetime of this anchor is 8。104× times and the fatigue lifetime of this anchor shank is 9。056×times, which belongs to high-frequency fatigue。 All this anchors’ structural intensity, severity, life are reached the operating equipment of every shipment。

Key words: high holding power anchor, structural optimization designing, statics analyzing, fatigue  lifetime calculation

目录

第一章 绪论 1

1。1 课题研究的背景及意义 1

1。2 船用锚的发展简介 2

1。3 船用大抓力锚国内外研究现状 4

1。4 本文的研究内容 6

第二章 船用大抓力锚的方案设计