CAJ | 학술논문

为了提供在导弹运输过程中振动问题的理论分析依据，分别利用能量法和有限元方法对运输车和弹体进行了动力学建模，并通过支撑处的自由度匹配建立车弹耦合振动分析模型。通过求解车弹耦合振动微分方程，分析了路面激励下系统的振动量级。利用数值仿真研究了不同弹体支撑刚度、车速和路面等级等因素对弹体某重要部位振动量级的影响。结果表明：弹体动响应均方根随着运输车车速的增大呈波动增大，随着支撑刚度的增加而减小，并趋于稳定。
위료제공재도탄운수과정중진동문제적이론분석의거，분별이용능량법화유한원방법대운수차화탄체진행료동역학건모，병통과지탱처적자유도필배건립차탄우합진동분석모형。통과구해차탄우합진동미분방정，분석료로면격려하계통적진동량급。이용수치방진연구료불동탄체지탱강도、차속화로면등급등인소대탄체모중요부위진동량급적영향。결과표명：탄체동향응균방근수착운수차차속적증대정파동증대，수착지탱강도적증가이감소，병추우은정。
To provide a theoretical background of vibration problems during missile transportation, the equation of motion of the transportation vehicle and missile are derived by using the energy ap-proach and finite element method, respectively, via the matching of the degrees-of-freedom ( DOFs) at the braces between vehicle and missile, the coupled vibration analysis model of the vehicle-missile system is formulated.By solving the coupled vibration differential equation of the vehicle-missile system, the vibration level of the system due to road excitation is analyzed.Numerical simulations are conducted to investigate the influence of different factors, such as the brace stiffness, vehicle's velocities, road grades, etc.on the vibration level of a key position on the missile.Results show that the root mean square ( RMS ) of the dynamic response increases with fluctuations when the vehicle's velocity increases, but decreases and tends to be stable with the increase of the bracing stiffness.