本文選題：RCC重力壩 + 溢流斷面　； 參考：《西北農(nóng)林科技大學(xué)》2017年碩士論文

【摘要】：目前,越來越多的大型水利工程采用RCC重力壩作為目標(biāo)壩型,但它同樣具有壩體斷面尺寸大、消耗砼材料多、不能有效地發(fā)揮材料的強(qiáng)度等缺點,這些問題都會給工程建設(shè)帶來不利的影響,本文在對某水庫工程RCC重力壩進(jìn)行設(shè)計的基礎(chǔ)上,基于ANSYS和MATLAB的聯(lián)合應(yīng)用,對RCC重力壩的溢流壩斷面進(jìn)行一階優(yōu)化和復(fù)合形法優(yōu)化,減少了材料的用量,降低工程造價,對工程實踐有一定的參考價值。本文主要的研究內(nèi)容及所得成果如下:(1)本文完成了筑壩壩址、壩型、泄水建筑物和消能防沖型式的比選,依據(jù)所選結(jié)構(gòu)型式和規(guī)范要求,對壩體進(jìn)行了設(shè)計。(2)對WES堰的泄流能力、泄槽水面線、挑距和沖坑深度進(jìn)行了計算,從而確定了上游特征水位的下泄流量、泄槽的摻氣水深以及泄槽末端的流速,并驗算了挑距與沖坑深度的比值。最后,根據(jù)抗剪斷強(qiáng)度公式和應(yīng)力計算公式驗算了壩體的抗滑穩(wěn)定安全系數(shù)、壩基面和壩體的應(yīng)力。(3)建立了RCC重力壩溢流斷面二維平面的參數(shù)化模型,用ANSYS有限元軟件對溢流斷面進(jìn)行靜力分析,研究了其在基本組合和特殊組合下的位移和應(yīng)力分布。(4)根據(jù)RCC重力壩正常運行的要求,確定設(shè)計變量、約束條件和目標(biāo)函數(shù)。根據(jù)復(fù)合形法的基本原理,運用MATLAB軟件編寫了復(fù)合形法主函數(shù)等程序,通過反射、收縮、擴(kuò)張等運算,實現(xiàn)了在可行域內(nèi)的優(yōu)化搜索,并用ANSYS進(jìn)行求解。(5)以溢流壩斷面面積最小為目標(biāo),分別采用ANSYS一階優(yōu)化方法和基于MATLAB的復(fù)合形法對其進(jìn)行優(yōu)化。結(jié)果表明:復(fù)合形法優(yōu)化效果最為明顯,兩種荷載組合下優(yōu)化后的斷面面積分別減少了577.32m2和509.27m2,面積優(yōu)化率分別達(dá)到16.73%和14.76%;ANSYS優(yōu)化方法效果次之,兩種荷載組合下優(yōu)化后的斷面面積分別減少了472.27m2和442.20m2,面積優(yōu)化率分別達(dá)到13.7%和12.8%。復(fù)合形法操作簡單,應(yīng)用廣泛,在結(jié)構(gòu)優(yōu)化設(shè)計中具有一定的應(yīng)用價值。
[Abstract]:At present, more and more large water conservancy projects use RCC gravity dam as the target dam type, but it also has the disadvantages of large section size of the dam body, more concrete material and not effective use of material strength. These problems will bring adverse effects on engineering construction. This paper is the foundation of the design of a reservoir engineering RCC gravity dam. On the basis of the combined application of ANSYS and MATLAB, the first order optimization and compound shape optimization of spillway dam section of RCC gravity dam are optimized, which reduces the amount of material and reduces the cost of the project. It has a certain reference value to the engineering practice. The main contents and results of this paper are as follows: (1) this paper completed dam site, dam type and discharge building. The dam body is designed according to the selected structure type and standard requirement. (2) the discharge capacity of the WES weir, the water surface line of the slots, the pitch and the depth of the punching pit are calculated, and the discharge flow of the characteristic water level in the upper reaches, the depth of the doughnut and the flow velocity at the end of the slots are determined, and the distance and impulse are checked. The ratio of pit depth. Finally, according to the formula of shear strength and the formula of stress calculation, the stability safety factor of the dam and the stress of dam foundation surface and dam body are checked. (3) a parameterized model of the two-dimensional plane of the overflow section of RCC gravity dam is established, and the static analysis of the overflow section is carried out with the ANSYS finite element software, and its basic combination is studied. The displacement and stress distribution under special combination. (4) according to the requirements of the normal operation of RCC gravity dam, design variables, constraints and objective functions are determined. According to the basic principle of the compound shape method, the program of the compound method main function is written by MATLAB software, and the optimization search in the feasible region is realized by the operation of reflection, contraction, expansion and so on. ANSYS is used to solve the problem. (5) taking the minimum section area of the overflow dam as the goal, the first order optimization method of ANSYS and the compound shape method based on MATLAB are used to optimize them respectively. The results show that the optimization effect of the composite shape method is most obvious. The surface product of the two kinds of combined loads is reduced by 577.32m2 and 509.27m2 respectively, and the area optimization rate is divided. Do not reach 16.73% and 14.76%; the ANSYS optimization method is the second one. The optimized section area is reduced by 472.27m2 and 442.20m2 respectively under the two load combinations. The area optimization rate is 13.7% and the 12.8%. compound method is simple and widely used, and it has a certain application value in the structural optimization design.

【學(xué)位授予單位】：西北農(nóng)林科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TV642

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本文編號：1806098