摘要
本文以某型舰用滑动式中间轴承为研究对象,建立基于时域法的中间轴承抗冲击数值模型,获得不同方向冲击载荷下的响应特性。进一步,针对冷却盘管在垂向冲击载荷作用下晃动幅度大并与轴承座发生剧烈碰撞的问题,采用双夹持机构的改进设计优化冷却盘管的支撑,分析优化后冷却盘管的响应特性以及夹持机构安装位置对冷却盘管响应特性的影响。研究结果表明:中间轴承主体部件在纵向冲击下响应最大,垂向最小;而冷却盘管响应规律则相反,其在垂向冲击下响应最大,并与轴承座发生剧烈碰撞,工作状况恶劣。优化后的冷却盘管在垂向冲击下最大应力下降了30.29%,并避免了剧烈碰撞现象的发生。轴承座、轴承盖在设计时应注意应力集中部位过渡圆角的控制,双夹持机构能有效改善冷却盘管的支撑,提高其抗冲击性能,且取安装系数为0.48~0.55的安装位置效果最佳。本文研究成果可为舰船滑动式中间轴承以及冷却盘管的结构设计与优化提供参考。
Based on the time-domain method,the numerical model of the impact resistance of the sliding intermediate bearing for a certain type of ship is established in this paper,and the response characteristics of the intermediate bearing under the impact load in different directions are obtained.Further,in order to solve the problem that the cooling coil has large shaking amplitude and violent collision with the bearing seat under vertical impact load,the improved design of double clamping mechanism is adopted to optimize the support of the cooling coil.The response characteristics of cooling coil after optimization and the influence of clamping mechanism installation position on the response characteristics of cooling coil are analyzed.The results show that the main part of the intermediate bearing has the maximum response under longitudinal impact and the minimum response under vertical impact.However,the cooling coil has the opposite response law.It has the maximum response under vertical impact,and has a violent collision with the bearing seat,and the working condition is poor.The maximum stress of the optimized cooling coil is reduced by 30.29%under vertical impact,and the occurrence of violent collision is avoided.In the design of bearing seat and bearing cover,attention should be paid to the control of the transition fillet of the stress concentrated part.The double clamping mechanism can effectively improve the support of cooling coil and its impact resistance,and the installation position with the installation coefficient of 0.48~0.55 has the best effect.The research work in this paper can provide a more comprehensive reference for the structural design and optimization of ship sliding intermediate bearing and cooling coil.
作者
曾良辉
周凯峰
潘康毅
曹健
孙玮
叶晓明
ZENG Liang-hui;ZHOU Kai-feng;PAN Kang-yi;CAO Jian;SUN Wei;YE Xiao-ming(School of Energy and Power Engineering,Huazhong University of Science and Technology,Wuhan 430074,China;Shanghai Marine Equipment Research Institute,Shanghai 210030,China)
出处
《舰船科学技术》
北大核心
2023年第7期118-125,共8页
Ship Science and Technology
关键词
滑动式中间轴承
抗冲击
时域法
冷却盘管
双夹持机构
sliding intermediate bearing
impact resistance
time-domain method
cooling coil
double clamping structure
