摘要
建立超高速水下航行体的有限元模型,针对超高速水下航行体受力特点,对航行体结构进行静力分析、屈曲分析和谐响应分析。数值计算结果表明,结构在轴向压力作用下最大应力值约为114Mpa,明显高于静水压力情况;空化器结构更容易发生屈曲失稳而导致结构破坏,其屈曲临界压力为54KN,临界航行速度为280m/s;当航行体尾部与空泡壁碰撞冲击频率为352HZ、400HZ、672HZ和704HZ时,超高速水下航行体壳体的变形和应力较大,容易发生结构破坏。
A high fidelity finite element model of the supercavitating underwater vehicle is developed and the static strength,buckling,and frequency response analyses are performed considering the loading configuration of the supercavitating body.The numerical simulation results show that the maximum von mises stress of the stucture under axial loads is about to 114Mpa,which is more than that under hydrostatic pressure obviously,and the buckling of the cavitator structure is a potential mode of structural failure with the critical buckling load of 54KN and the critical velocity of 280m/s.The results also indicate that the supercavitating shell structure fails potentially with the impact frequencies of 352HZ,400HZ,672HZ and 704HZ.
出处
《机械设计与制造》
北大核心
2011年第3期235-237,共3页
Machinery Design & Manufacture
关键词
超空泡
有限元方法
静强度
屈曲
谐响应
Supercavitation
Finite element method
Static strength
Buckling
Frequency response
