【摘要】：錨泊系統(tǒng)用于將浮體結構物固定于水中某一位置,它適用于不同水深,對浮體結構物的正常使用有著很大影響。錨泊系統(tǒng)的錨繩在水底與錨固端連接,而通過連接器與浮體結構物作用。隨著陸上資源的不斷消耗,進行海上新資源的開發(fā)利用成為了不可避免的趨勢。廣闊的海洋中,不僅蘊藏著豐富的油氣資源,更加有著取之不盡、不斷再生的波浪能、風能等能源,而各類海洋資源與能源的開發(fā)利用都有可能涉及到使用錨泊定位的浮體結構物。隨著我國對海洋資源與能源開發(fā)力度的不斷加大,錨泊系統(tǒng)的快速計算及其應用在工程中將會有很大的使用空間。錨鏈受多種環(huán)境作用力影響,風、浪、流對其均有作用,該問題的研究較為復雜,所以通常對其作適當簡化,并討論簡化的合理性及其應用范圍。在本文中,簡化的錨鏈受力計算過程被給出；在滿足錨鏈使用要求的情況下,為更好地改變錨鏈的受力特性,一根錨鏈可以由性質不同的幾段組成即多段錨鏈,分析并掌握多段懸鏈的錨鏈特性和計算其錨泊力很有必要,因此本文給出了多段錨鏈受力的計算步驟,并應用切比雪夫擬合錨鏈的受力。本文研究結果表明,切比雪夫擬合結果有著高精度,很適合用于錨鏈力的擬合,并且可以對不同錨鏈采用統(tǒng)一性的計算受力,本文的研究方法大大簡化了錨鏈力計算程序的操作并減少了錨鏈力的計算時間。另外,本文還推導了錨泊系統(tǒng)力與剛體空間運動的關系函數(shù),并將其用于相應的浮體計算模型。采用高階邊界元求解勢流理論下的浮體波浪力,應用于錨泊與浮體結構系統(tǒng)運動數(shù)值模擬。同時給出頻域模型及其時域模型,互相印證。最后論文通過一個簡單算例,對模型正確性進行驗證,比較頻域模擬和時域模擬錨泊系統(tǒng)的結果差異,獲得關于錨鏈幾何非線性的影響效果。
[Abstract]:The mooring system is used to fix the floating structure in a certain position in the water. It is suitable for different water depths and has a great influence on the normal use of the floating structure. The anchor rope of the mooring system is connected to the anchoring end at the bottom of the water and acts on the floating structure through the connector. With the continuous consumption of land resources, the exploitation and utilization of new marine resources has become an inevitable trend. In the vast ocean, there are not only abundant oil and gas resources, but also inexhaustible, renewable wave energy, wind energy and other energy sources. The development and utilization of various marine resources and energy resources may involve floating structures located by mooring. With the increasing development of marine resources and energy in China, the fast calculation of mooring system and its application in engineering will have great application space. The Anchorage chain is affected by many kinds of environmental forces, wind, wave and current are all acting on it. The research on this problem is complicated, so it is usually simplified properly, and the rationality of simplification and its application range are discussed. In this paper, the simplified stress calculation process of the anchor chain is given. In order to change the stress characteristics of the anchor chain better, a single chain can be composed of several segments with different properties, that is, the multi-segment anchor chain. It is necessary to analyze and master the characteristics of multi-segment catenary and to calculate its anchoring force. Therefore, the calculation procedure of multi-segment chain force is given in this paper, and Chebyshev is used to fit the force of anchor chain. The results show that the Chebyshev fitting results have high accuracy and are suitable for the fitting of anchor chain forces, and can be used to calculate the forces of different anchor chains. The research method in this paper greatly simplifies the operation of the program and reduces the calculation time of the anchor chain force. In addition, the relation function between the force of the mooring system and the spatial motion of the rigid body is derived and applied to the corresponding floating body calculation model. The high order boundary element is used to solve the wave force of floating body under the potential flow theory, and it is applied to the numerical simulation of mooring and floating structure system. At the same time, the frequency domain model and its time domain model are given to verify each other. Finally, through a simple example, the correctness of the model is verified, and the results of frequency domain simulation and time domain simulation are compared, and the effect of geometric nonlinearity of anchor chain is obtained.
【學位授予單位】：大連理工大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：U653.2

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本文編號：2128368