系泊多体浮式码头的非线性动力特性
发布时间：2018-08-14 20:16
【摘要】：多体浮式码头由很多小的浮体模块组成,浮体间通过连接件相连,连接件可提供吸引和排斥力,首尾两端用缆索锚泊于海底.不同于传统分析方法,将每一个浮体模块当做一个独立振子,引入两个相对独立的耦合参数来分别表示浮体间的吸引作用和排斥作用,再考虑波浪和系泊缆作用,得到多体浮式码头动力响应的非线性分析模型.以长度600米的链式四浮体码头为例,利用四阶Runge-Kutta法求解码头运动微分方程,得到码头的运动响应情况和最佳的耦合参数范围区间.数值结果发现,吸引和排斥耦合的相互作用使得多体浮式码头模型表现出丰富的动力学现象,比如幅值跳跃、滞后同步、反向同步等.最后,为进一步揭示耦合多浮体系统的集体动力学行为,引入一个相似函数,该函数可表征两时间序列的相关性强弱,从而判断多体浮码头响应同步化协同效应程度.该方法尝试从网络动力学的角度去研究多体浮式码头的非线性动力特性,为多体浮式码头的初步设计提供理论参考.
[Abstract]:Multi-body Floating Wharf is composed of many small floating body modules. The floating body is connected by connectors, which can provide attraction and repulsion. The two ends of the floating body are anchored on the seabed by cables. Different from the traditional analysis method, each floating body module is regarded as an independent oscillator and two relatively independent coupling parameters are introduced to represent the floating body separately. The nonlinear analysis model of the dynamic response of a multi-body Floating Wharf is obtained by considering the effects of wave and mooring cable. Taking a 600-meter-long chain four-floating wharf as an example, the fourth-order Runge-Kutta method is used to solve the differential equations of wharf motion, and the motion response of the wharf and the optimal range of coupling parameters are obtained. The numerical results show that the interaction of attraction and repulsion makes the multi-body Floating Wharf model exhibit abundant dynamic phenomena, such as amplitude jump, lag synchronization, reverse synchronization, etc. Finally, a similar function is introduced to further reveal the collective dynamic behavior of the coupled multi-body system, which can characterize the two time series. This method tries to study the nonlinear dynamic characteristics of multi-body Floating Wharf from the point of view of network dynamics, and provides a theoretical reference for the preliminary design of multi-body floating wharf.
【作者单位】： 江苏中路工程技术研究院有限公司;中山大学工学院应用力学与工程系;
【基金】：国家自然科学基金(11172334) 广东省自然科学基金(031552)资助
【分类号】：O302
本文编号：2183999
[Abstract]:Multi-body Floating Wharf is composed of many small floating body modules. The floating body is connected by connectors, which can provide attraction and repulsion. The two ends of the floating body are anchored on the seabed by cables. Different from the traditional analysis method, each floating body module is regarded as an independent oscillator and two relatively independent coupling parameters are introduced to represent the floating body separately. The nonlinear analysis model of the dynamic response of a multi-body Floating Wharf is obtained by considering the effects of wave and mooring cable. Taking a 600-meter-long chain four-floating wharf as an example, the fourth-order Runge-Kutta method is used to solve the differential equations of wharf motion, and the motion response of the wharf and the optimal range of coupling parameters are obtained. The numerical results show that the interaction of attraction and repulsion makes the multi-body Floating Wharf model exhibit abundant dynamic phenomena, such as amplitude jump, lag synchronization, reverse synchronization, etc. Finally, a similar function is introduced to further reveal the collective dynamic behavior of the coupled multi-body system, which can characterize the two time series. This method tries to study the nonlinear dynamic characteristics of multi-body Floating Wharf from the point of view of network dynamics, and provides a theoretical reference for the preliminary design of multi-body floating wharf.
【作者单位】： 江苏中路工程技术研究院有限公司;中山大学工学院应用力学与工程系;
【基金】：国家自然科学基金(11172334) 广东省自然科学基金(031552)资助
【分类号】：O302
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