CAJ | 학술논문

将准零刚度隔振器应用于船舶机械隔振浮筏，构造单层准零刚度隔振浮筏，建立了系统的6自由度动力学方程，利用数值方法对系统响应进行了分析，并评估了系统的隔振性能。结果表明，当激励幅值较大时，因系统刚度具有非线性，导致力传递率曲线出现跳跃现象，准零刚度隔振浮筏系统的起始频率远低于线性浮筏系统，且隔振效率远高于线性系统。进一步，利用最优时延反馈控制方法对浮筏系统实施了混沌化，对于不同激励频率均可实现混沌化，且激励频率越高越易混沌化。
장준령강도격진기응용우선박궤계격진부벌，구조단층준령강도격진부벌，건립료계통적6자유도동역학방정，이용수치방법대계통향응진행료분석，병평고료계통적격진성능。결과표명，당격려폭치교대시，인계통강도구유비선성，도치력전체솔곡선출현도약현상，준령강도격진부벌계통적기시빈솔원저우선성부벌계통，차격진효솔원고우선성계통。진일보，이용최우시연반궤공제방법대부벌계통실시료혼돈화，대우불동격려빈솔균가실현혼돈화，차격려빈솔월고월역혼돈화。
Quasi-zero stiffness (QZS)isolators were applied to the vibration isolation raft for mechanical equipments of ship.A sing-layer quasi-zero stiffness raft was constructed,and the corresponding dynamic equations with six degrees of freedom were es-tablished.The structure responses were obtained through numerical simulations,and the efficiency of the raft was evaluated in terms of force transmissibility.Results show that the starting frequency for vibration isolation of the QZS raft is much lower than that of the linear raft,and the efficiency of the QZS isolator is much higher than that of the linear raft.Moreover,the QZS raft is driven to be chaotic by utilizing optimal time-delay feedback control method,which demonstrates that chaotification can be a-chieved by various excitation frequencies,and the system is more likely to be chaotified under high frequency excitation.