CAJ | 학술논문

为对超空泡航行体结构进行优化设计和安全评估，将其简化为两端自由的梁，在空泡形态和受力确定的基础上，利用哈密顿原理，推导出了运动和变形耦合动力学方程组，建立了有限元模型。利用模态法和纽马克法对横向振动方程进行了求解，并对耦合、无耦合的方程进行了定性定量的比较分析。结果表明：耦合转动角速度增加了高频的波动；由于航行体自身刚度和固有频率较大，转动对它们的响应影响较小。
위대초공포항행체결구진행우화설계화안전평고，장기간화위량단자유적량，재공포형태화수력학정적기출상，이용합밀돈원리，추도출료운동화변형우합동역학방정조，건립료유한원모형。이용모태법화뉴마극법대횡향진동방정진행료구해，병대우합、무우합적방정진행료정성정량적비교분석。결과표명：우합전동각속도증가료고빈적파동；유우항행체자신강도화고유빈솔교대，전동대타문적향응영향교소。
A supercavitating vehicle is thought of as a beam of free boundary conditions .According to the shape and force of cavity and Hamilton′s principle , the rigid-flexible coupling equations are a-chieved and a finite element model is established .The model can be used for the general flexible beam with axial forces .The modal method and Newmark method are used to solve the equation of trans-verse oscillation and make qualitative and quantitative analyses of the coupling and uncoupling equa-tions .The results show that the coupling angular velocity vibrates with high frequencies .As the stiff-ness and natural frequency of an underwater vehicle is relative high ,the rotation has a minor effect on its dynamic response .