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  本文選題：土基船閘 + 閘室結(jié)構(gòu)��； 參考：《大連海洋大學(xué)》2015年碩士論文

【摘要】：閘室是船閘工程中重要的組成部分,因此閘室結(jié)構(gòu)應(yīng)力計算的準(zhǔn)確性對最后船閘設(shè)計的準(zhǔn)確性、合理性以及經(jīng)濟(jì)性起著舉足輕重的作用。本文通過對比傳統(tǒng)解析法和有限元軟件ANSYS對某土基塢式船閘閘室結(jié)構(gòu)應(yīng)力的計算結(jié)果,針對傳統(tǒng)解析法在計算中的局限性,驗(yàn)證有限元軟件ANSYS在船閘閘室結(jié)構(gòu)應(yīng)力計算中的準(zhǔn)確性。同時利用有限元軟件ANSYS真實(shí)模擬船閘閘室結(jié)構(gòu),找到影響船閘閘室結(jié)構(gòu)應(yīng)力的關(guān)鍵因素,從而為船閘閘室設(shè)計的經(jīng)濟(jì)和效率等方面提供參考。本文主要研究工作和結(jié)果是:利用傳統(tǒng)解析法,計算在各種荷載組合作用下,土基上的塢式船閘閘室的結(jié)構(gòu)應(yīng)力情況;采用ANSYS大型三維有限元軟件建立船閘閘室模型,模擬船閘結(jié)構(gòu)與周圍土體相互作用,調(diào)整設(shè)計參數(shù),對土基上的船閘閘室結(jié)構(gòu)進(jìn)行計算并分析;對荷載的加載過程筆者編了一套程序,可以較為簡單的完成加載任務(wù),并且也可以推行到其他船閘閘室加載過程中去。對有限元法得到的結(jié)果以及解析法得到的結(jié)果進(jìn)行對比,驗(yàn)證了有限元軟件ANSYS模型建立和計算結(jié)構(gòu)的準(zhǔn)確性,并得出解析法在結(jié)構(gòu)計算上的局限性,有限元法在邊界條件和實(shí)際參數(shù)的設(shè)定上要比解析法更真實(shí)。不過在一些局部或者關(guān)鍵部位,有限元計算結(jié)果比較大,這是由于在模型中的某些節(jié)點(diǎn)產(chǎn)生應(yīng)力集中現(xiàn)象;有限元軟件ANSYS和傳統(tǒng)解析法在最后都得出了相同的結(jié)果:該土基上的塢式船閘閘室結(jié)構(gòu)抗滑、抗傾、抗浮穩(wěn)定性符合設(shè)計條件,但是地基承載力在各個工況下均不能符合條件,需要進(jìn)行地基處理;通過改變土體內(nèi)摩擦角φ、閘墻背與垂直線的夾角α,閘室自重和填土土壓力變化,船閘閘室結(jié)構(gòu)的應(yīng)力分布變得很均勻,并結(jié)合非線性有限元的計算分析結(jié)果,結(jié)果表明:在土基上的塢式船閘閘室結(jié)構(gòu),閘室自重和填土的土壓力是影響閘室結(jié)構(gòu)應(yīng)力的重要影響因素。
[Abstract]:Lock chamber is an important part of shiplock engineering, so the accuracy of stress calculation of lock structure plays an important role in the accuracy, rationality and economy of final lock design. In this paper, the traditional analytical method and the finite element software ANSYS are compared to calculate the structural stress of a certain earthen dock lock chamber, aiming at the limitation of the traditional analytical method in the calculation. The accuracy of finite element software ANSYS in the stress calculation of lock chamber is verified. At the same time, the finite element software ANSYS is used to simulate the lock chamber structure, and the key factors affecting the structural stress of the lock chamber are found, which provides a reference for the economic and efficiency aspects of the lock chamber design. The main research work and results of this paper are as follows: using the traditional analytical method to calculate the structural stress of dock lock chamber on soil foundation under the action of various load combinations, the model of lock chamber is established by using ANSYS large-scale three-dimensional finite element software. Simulating the interaction between shiplock structure and surrounding soil, adjusting design parameters, calculating and analyzing the structure of lock chamber on soil foundation, making a program for loading process, which can accomplish the loading task easily. It can also be applied to the loading process of other lock chambers. By comparing the results obtained by finite element method with those obtained by analytical method, the accuracy of the finite element software ANSYS model establishment and structure calculation is verified, and the limitation of the analytical method in structure calculation is obtained. The finite element method is more realistic than the analytical method in setting the boundary conditions and actual parameters. However, in some local or key parts, the finite element results are relatively large, which is due to the stress concentration phenomenon in some nodes in the model. The finite element software ANSYS and the traditional analytical method have obtained the same result in the end: the structure of dock lock chamber on the soil foundation meets the design conditions, but the bearing capacity of the foundation can not meet the conditions under each working condition, and the stability of anti-slide, anti-dip and anti-floatation of the dock lock chamber structure on the soil foundation is in accordance with the design conditions. By changing the internal friction angle 蠁, the angle 偽 between the back of the lock wall and the vertical line, the weight of the lock chamber and the earth pressure, the stress distribution of the lock chamber structure becomes very uniform. Combined with the results of nonlinear finite element analysis, the results show that the weight of lock chamber and the earth pressure of fill are the important factors that affect the stress of the lock chamber structure on the earth foundation.
【學(xué)位授予單位】：大連海洋大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：U641.31

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本文編號：1942424