气垫船导管支臂振动疲劳寿命研究  

Study on the vibration fatigue life of ducted propeller arm of hovercraft

作　　者：梁世哲 熊宇超 张斌 甘国龙 Liang Shizhe;Xiong Yuchao;Zhang Bin;Gan Guolong(AVIC Chengdu Aircraft Industrial(Group)Co.,Ltd.,Sichuan Chengdu,610092,China)

机构地区：[1]航空工业成都飞机工业(集团)有限责任公司,四川成都610092

出　　处：《机械设计与制造工程》2024年第6期116-121,共6页Machine Design and Manufacturing Engineering

摘　　要：气垫船工作中长期承受振动载荷,支臂外接头易产生疲劳裂纹。以气垫船导管支臂为研究对象,建立其有限元模型,根据模态分析结果阐述了外接头倒角区域裂纹出现位置具有随机性的原因;提取导管支臂模型的1/5模型作为子模型,通过模态对比分析进行模型简化;基于子模型分析了导管支臂对不同振动方向的振动敏感性;采用Dirlik方法估算不同振动方向的导管支臂振动疲劳寿命,并结合Miner线性损伤累积理论估算多轴向振动联合作用下的导管支臂振动疲劳寿命,为此类导管支臂振动疲劳寿命分析提供思路。The hovercraft bears the influence of vibration load for a long time.Fatigue cracks often occur at the outer joint of the ducted propeller arm due to vibration.Taking the ducted propeller arm as the research object,a finite element model is established.The modal analysis results show that the crack location in the chamfer area of the outer joint is random.One fifth of the whole model is extracted as a sub model,and the model is simplified through modal comparison analysis.Based on the submodel,the vibration sensitivity of the ducted propeller arm to different vibration directions is analyzed.Dirlik method is used to estimate the vibration fatigue life under different vibration directions,and Miner linear damage accumulation theory is used to estimate the vibration fatigue life under the combined action of multiaxial vibration,providing ideas for analyzing the vibration fatigue life of the ducted propeller arms.

关 键 词：导管支臂 子模型 振动疲劳 寿命估算 

分 类 号：TB132[理学—物理]