On prediction of longitudinal attitude of planing craft based on controllable hydrofoils

The purpose of this research study was to examine the attitude response of a planing craft under the controllable hydrofoils.Firstly,a non-linear longitudinal attitude model was established.In the mathematical model,effects of wind loads were considered.Both the wetted length and windward area varied in different navigation conditions.Secondly,control strategies for hydrofoils were specified.Using the above strategies,the heave and trim of the planing craft was adjusted by controllable hydrofoils.Finally,a simulation program was developed to predict the longitudinal attitudes of the planing craft with wind loads.A series of simulations were performed and effects of control strategies on longitudinal attitudes were analyzed.The results show that under effects of wind loads,heave of fixed hydrofoils planing craft decreased by 6.3%,and pitch increased by 8.6% when the main engine power was constant.Heave decreased by less than 1% and trim angle decreased by 1.7% as a result of using variable attack angle hydrofoils;however,amplitude changes of heave and pitch were less than 1% under the control of changeable attack angle hydrofoils and longitudinal attitude.     

水翼船翼柱自位轴承的径向静载模拟试验

通过计算自位轴承在３ＭＮ径向静载作用下外座圈的理论比压、确定了模拟试验的载荷；采用应变测量、位移测量和试验前后试样厚度测量等三种方法，评价了自位轴上座圈代用材料ＺＱＳｎ１０－１的径向承载能力，模拟试验在ＷＥ１００型拉压材料试验机上进行。试验结果表明，在０．０８ＭＮ径向静载作用下，试样处在弹性范围内，即使载荷达０．１２ＭＮ，也未生变形，由判断自位轴承的磷青铜外座圈在３ＭＮ径向静载试验载荷作用下是安全     

水翼船翼柱自位球轴承动载模拟试验横研制

本文介绍的水翼船翼柱自位球轴承载模拟试验机由加载、回转振荡、摇摆振荡、润滑及自动控制等５个系统组成，可用于水翼船翼柱自位球轴承改进设计与材料代用的研究。     

RS30水翼客船推进轴系校中若干动态因素的考虑

根据在ＰＳ３０水翼船上采用理论分析及定量计算方法进行推进轴系校中时首次尝试考虑各动态因素的情况，介绍了其推进轴系的变形特点、校中的原则、变形量的计算与处理预报的轴系校中预偏置量和实际安装值，以及在实船试航与营运中取得的令人满意的结果。