摘要
[目的]为了在船舶推进轴系安装完成后对其实际的安装状态进行检验,[方法]提出基于弯矩影响系数的轴系状态逆计算方法。推出轴系任意截面弯矩与轴承变位的线性关系,通过实测弯矩直接推算轴承变位与实际负荷,反演轴系的状态参数。研究弯矩影响系数的特性,建立与应变测试相适应的轴系状态分析模型,给出多种轴系类型的应变测点布置原则,提出以降低误差敏感度为目标的应变测点优化方法。对38 500 DWT散货船推进轴系进行实测,通过所提出的方法推算轴系的实际安装状态。[结果]结果显示,推算的轴承负荷与现场顶举负荷完全一致,最大相对误差为3.14%。[结论]实验验证了该方法的正确性和适用性,可为轴系安装状态的评估提供一种新的方法。
[Objectives]In order to examine the actual status of the ship's propulsion shaft system after installation,[Methods]a shaft system status inverse calculation method based on bending moment influence coefficient was proposed.The linear relationship between the bending moment and the bearing adjustment of any section of shaft system is derived to calculate bearing offsets and actual load and to inverse the status parameters of shaft system.The characteristics of the bending moment influencing coefficient are studied to establish the shaft system status analysis model which is suitable for the strain test,the strain test points arrangement principles for various types of shaft system are provided,and strain test points optimization method with the aim of reducing the error sensitivity is also proposed.The propulsion shaft system of 38500 DWT bulk carrier was measured,and the actual installation state of the shaft system was calculated by the proposed method.[Results]The results show that the bearing loads calculated exactly match the jacked loads and the maximum relative error is 3.14%.[Conclusions]The correctness and applicability of the method in this paper were verified by the test,and a new method for evaluating the installation status of shaft system is provided.
作者
陈昊
周瑞平
雷俊松
张建军
Chen Hao;Zhou Ruiping;Lei Junsong;Zhang Jianjun(School of Energy and Power Engineering,Wuhan University of Technology,Wuhan 430063,China;Shanghai Rule and Regulation Research Institute,China Classification Society,Shanghai 200135,China)
出处
《中国舰船研究》
CSCD
北大核心
2019年第2期137-143,共7页
Chinese Journal of Ship Research
基金
国家自然科学基金资助项目(51839005
51479154)
关键词
轴系安装状态
逆计算方法
弯矩影响系数
测点布置优化
shaft system installation status
inverse calculation method
bending moment influence coefficient
optimization for arrangement of test point
