摘要
船用滑动轴承是轴系的重要组成部分,其稳定性是舰船机动性的基本保证。但滑动轴承在水下爆炸载荷作用下的冲击试验却不多见。以船用大型滑动轴承为研究对象,专门研制了一套能够模拟实船安装状态和工作状态的试验传动轴系系统,在浮动冲击平台上开展了水下爆炸冲击试验,分析了轴承瞬态响应特征。结果发现,滑动轴承油膜关系在剧烈的垂向冲击载荷作用下出现碰摩,能够瞬时提高运转扭矩,对轴系动力源的冲击可靠性提出了更高要求,浮台横向冲击载荷较小,轴系振动幅值未超过轴承间隙。通过试验研究发现目前应用的油膜动力学模型并不适用冲击动响应分析,急需建立适用的模型。研究对于进一步修正舰艇轴系冲击动力学模型、提高仿真预报精度提供了参考。
The sliding bearing is an important component of propulsion shaft in ship; its stability is the basic promise of maneuverability. A large-sized sliding bearing on board as the subject was investigated. The experimental shafting system for simulating installation state and wording state on board was specially developed. The shock tests were carried through on floating shock platform subjected to underwater explosions. The test results showed that the rubs appeared between the bushing and shaft during intense vertical impact loading,as a result the operate moment of torque was instantly increased about 200%,which presented more requirements for shafting power. Due to the smaller intensity of transverse shock loading,the vibration amplitude was under the scope of bearing gap. Through these shock tests of sliding bearing,the dynamic model of oil film in present application does not appropriate for shock response analysis. This research presents reference for modifying shock dynamic model and increasing the simulation accuracy of shafting system.
出处
《机械强度》
CAS
CSCD
北大核心
2016年第2期259-264,共6页
Journal of Mechanical Strength
基金
国家自然科学基金项目(51209215)资助~~
关键词
滑动轴承
水下爆炸
冲击试验
碰摩
油膜
Sliding bearing
Underwater explosion
Shock test
Rub
Oil film force
