系泊多體浮式碼頭的非線性動力特性
發(fā)布時間:2018-08-14 20:16
【摘要】:多體浮式碼頭由很多小的浮體模塊組成,浮體間通過連接件相連,連接件可提供吸引和排斥力,首尾兩端用纜索錨泊于海底.不同于傳統(tǒng)分析方法,將每一個浮體模塊當(dāng)做一個獨立振子,引入兩個相對獨立的耦合參數(shù)來分別表示浮體間的吸引作用和排斥作用,再考慮波浪和系泊纜作用,得到多體浮式碼頭動力響應(yīng)的非線性分析模型.以長度600米的鏈式四浮體碼頭為例,利用四階Runge-Kutta法求解碼頭運動微分方程,得到碼頭的運動響應(yīng)情況和最佳的耦合參數(shù)范圍區(qū)間.數(shù)值結(jié)果發(fā)現(xiàn),吸引和排斥耦合的相互作用使得多體浮式碼頭模型表現(xiàn)出豐富的動力學(xué)現(xiàn)象,比如幅值跳躍、滯后同步、反向同步等.最后,為進一步揭示耦合多浮體系統(tǒng)的集體動力學(xué)行為,引入一個相似函數(shù),該函數(shù)可表征兩時間序列的相關(guān)性強弱,從而判斷多體浮碼頭響應(yīng)同步化協(xié)同效應(yīng)程度.該方法嘗試從網(wǎng)絡(luò)動力學(xué)的角度去研究多體浮式碼頭的非線性動力特性,為多體浮式碼頭的初步設(shè)計提供理論參考.
[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.
【作者單位】: 江蘇中路工程技術(shù)研究院有限公司;中山大學(xué)工學(xué)院應(yīng)用力學(xué)與工程系;
【基金】:國家自然科學(xué)基金(11172334) 廣東省自然科學(xué)基金(031552)資助
【分類號】:O302
本文編號: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.
【作者單位】: 江蘇中路工程技術(shù)研究院有限公司;中山大學(xué)工學(xué)院應(yīng)用力學(xué)與工程系;
【基金】:國家自然科學(xué)基金(11172334) 廣東省自然科學(xué)基金(031552)資助
【分類號】:O302
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