本文關鍵詞：鋼板樁碼頭在船舶撞擊下的安全性分析　出處：《江蘇科技大學》2015年碩士論文　論文類型：學位論文

  更多相關文章： 非線性 水平荷載 船與鋼板樁碼頭碰撞 數值仿真分析 撞擊力

【摘要】：改革開放以來,隨著我國國民經濟的持續(xù)高速發(fā)展,海洋運輸業(yè)快速發(fā)展,與國外貿易量越來越大,船舶進出港頻率提高,導致船舶撞擊碼頭的事故經常發(fā)生,造成較大的經濟損失和人員傷亡,帶來的間接損失更是不可估量的,也給碼頭留下了安全隱患。板樁碼頭作為一種重要碼頭形式,具有造價便宜,結構簡單,施工快速、方便,對復雜的地質條件適應性強等優(yōu)點,而其中鋼板樁重量輕,強度高,鎖扣緊密,止水性好,沉樁容易,所以被廣泛應用于大型深水碼頭工程中。目前在工程中,研究船與碼頭碰撞一般采用定性理論分析法、現場實測分析法和模型試驗分析法,而有限元法才剛剛起步,但是由于定性理論分析結果較為粗糙,可能與實際情況相差較大,而現場實測分析及模型試驗分析需要大量的人力、物力、財力,周期長且無法得到在各個時刻結構內部的變形及應力傳遞的情況。因此本文采用有限元法對鋼板樁碼頭進行分析。本文首先介紹船與碼頭碰撞研究的國內外現狀、船舶撞擊力的計算理論、方法以及板樁墻計算方法,對土體材料非線性、樁-土接觸非線性和碰撞過程非線性問題進行分析,詳細介紹有限元模型建立過程中單元類型選擇、材料選擇、接觸對定義和選擇等問題。然后,采用有限元軟件ANSYS建立數值分析模型,對鋼板樁碼頭在自重以及后場堆貨荷載作用下進行有限元分析,得到了對同類碼頭設計有重要參考價值結果。通過數值模擬分別計算在水平荷載作用位置、大小和角度以及回填土彈性模量E對碼頭鋼板樁等效應力的影響,并擬合計算結果總結出一些規(guī)律。最后,采用ANSYS/LS-DYNA來研究船舶與鋼板樁碼頭碰撞過程碼頭結構安全性。驗證了在規(guī)范規(guī)定最大的速度撞擊下碼頭結構的安全性,分析了撞擊位置、船舶噸位、船舶速度、回填土彈性模量E對撞擊力、鋼板樁等效應力、胸墻壓力以及土體吸收能量的影響,并將有限元計算的最大撞擊力值與國內外經驗公式計算值進行對比,總結出一些規(guī)律,從而為同類碼頭的設計和維修改造以及撞擊力的研究提供理論參考依據。
[Abstract]:Since the reform and opening up, with China's sustained rapid economic development, the rapid development of marine transportation industry, more and more foreign trade and ship out of Hong Kong, the higher the frequency, the pier due to ship collision accidents often occur, resulting in large economic losses and casualties, indirect losses is immeasurable, also to the wharf. Left a security risk. The sheet pile wharf as an important form of wharf, has low cost, simple structure, quick construction, convenient, the advantages of the complex geological conditions of strong adaptability, and the steel sheet pile of light weight, high strength, good waterproof, tight lock, pile easily, so it is widely used in large scale deep water wharf project. In the project, research on ship collision with the pier by qualitative theoretical analysis, field measurement analysis method and model test and the finite element method has just started, but The qualitative analysis results are rough, may have large difference with the actual situation, and on-site analysis and model experiment analysis requires a lot of manpower, material resources, financial resources, transfer the deformation period is long and not available in the internal structure of each moment and stress. The sheet pile wharf is analyzed by finite element method this paper first introduces the research status quo. The collision between ship and pier at home and abroad, theoretical calculation of ship impact force, calculation method and sheet pile wall, the soil material nonlinear pile-soil contact nonlinearity and nonlinear collision problems are analyzed in detail, establish a finite element model selection, element type in the process of material selection, contact the definition and selection. Then, a numerical analysis model is established by finite element software ANSYS, the steel sheet pile wharf heaped load in weight and lower back The finite element analysis, the results have important reference value to the similar wharf design. Through numerical simulation, calculated the level of load position, size and angle and affect elastic modulus of E steel sheet pile wharf on equivalent stress fill, and fitting the calculation results summed up some rules. Finally, to study the ship and steel sheet pile pier collision safety of wharf structure by ANSYS/LS-DYNA. Verify the specification in maximum speed impact safety of wharf structure, analyzes the impact position, ship tonnage, ship speed, backfill elastic modulus E of impact force of steel sheet pile stress, soil stress and energy absorption effect of parapet, and value with the domestic and foreign empirical formula calculation values are compared to the maximum impact force of the finite element method, summed up some rules, so as to similar terminal design and maintenance and transformation of impact force The research provides a theoretical reference.

【學位授予單位】：江蘇科技大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：U656.112

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本文編號：1393678