發(fā)布時間：2018-04-28 05:46

  本文選題：汽輪機基礎 + 動力特性�。� 參考：《北方工業(yè)大學》2017年碩士論文

【摘要】：作為電力系統(tǒng)的核心,發(fā)電廠屬于乙類抗震設防建筑,即在地震發(fā)生時其使用功能不能中斷或者需要盡快恢復的建筑。汽輪發(fā)電機基礎是發(fā)電廠承載汽輪發(fā)電機組的結構,其設計不僅要滿足結構強度的要求還要滿足設備安裝的空間需求。鑒于其重要性及結構的復雜性和特異性,有必要對其抗震性能進行深入研究,進而為此類特殊復雜結構的創(chuàng)新設計與選型改進提供一定的參考。本文以某1000MW發(fā)電廠汽輪發(fā)電機基礎為原型,依據相似定理,設計建造了 1:10的縮尺試驗模型,并且對此汽輪發(fā)電機基礎模型進行了以下試驗研究:(1)對結構模型進行了動力特性試驗,得到了結構振型、自振頻率及阻尼比,分析了自振頻率分布和振型特點。運用錘擊法對汽輪機基礎軸承支座處橫梁進行了動剛度測試,驗證了軸承支座在汽機動荷載作用下的運行穩(wěn)定性。(2)對基礎模型結構分別進行了 8度多遇和8度罕遇兩個工況的擬動力試驗,得到結構在地震作用下的響應,包括位移、加速度、鋼筋應變、層間位移角及恢復力-位移曲線等一系列的抗震性能指標。(3)對基礎模型結構進行了擬靜力試驗,對模型結構施加低周往復荷載,直到模型結構完全破壞。研究了模型結構在低周往復荷載作用下的破壞過程、塑性鉸出現的位置、滯回曲線、骨架曲線、延性系數、極限承載力、剛度退化等抗震性能。本文對汽輪發(fā)電機基礎的自振特性及抗震性能做了較全面的研究,通過試驗分析可以得出,該汽輪機基礎具有較好的抗震性能。研究結果可供地震區(qū)同類汽輪機基礎做抗震設計時參考。
[Abstract]:As the core of power system, power plant belongs to class B seismic fortification building, that is, the building whose function can not be interrupted or needs to be restored as soon as possible when the earthquake occurs. The turbogenerator foundation is the structure of the power plant bearing turbine-generator unit. Its design not only meets the requirements of the structural strength but also meets the space requirement of the installation of the equipment. In view of its importance and the complexity and specificity of the structure, it is necessary to conduct a deep study on its seismic performance, thus providing a certain reference for the innovative design and type selection improvement of this kind of special complex structure. Based on the prototype of turbogenerator foundation in a 1000MW power plant, a 1:10 scale test model is designed and constructed according to the similarity theorem. The following experiments are carried out on the turbogenerator foundation model: 1) the dynamic characteristics of the structure model are tested, and the vibration mode, natural vibration frequency and damping ratio are obtained, and the distribution and characteristics of the natural vibration frequency are analyzed. The dynamic stiffness of the crossbeam at the bearing support of the basic bearing of steam turbine was measured by hammering method. The stability of bearing under the action of steam maneuvering load is verified. The quasi dynamic tests of the foundation model structure are carried out under two working conditions of 8 degree frequent and 8 degree rare, respectively, and the response of the structure under earthquake action, including displacement, is obtained. A series of seismic performance indexes, such as acceleration, reinforcement strain, interstory displacement angle and restoring force-displacement curve, are tested on the foundation model structure under low cycle reciprocating load until the model structure is completely destroyed. The failure process of model structure under low cycle reciprocating load, the location of plastic hinge, hysteretic curve, skeleton curve, ductility coefficient, ultimate bearing capacity and stiffness degradation are studied. In this paper, the natural vibration characteristics and seismic performance of turbogenerator foundation are studied comprehensively, and the experimental results show that the turbine foundation has better seismic performance. The results can be used as reference for seismic design of the same steam turbine foundation in earthquake area.
【學位授予單位】：北方工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TU476.1;TM621

【參考文獻】

相關期刊論文 前10條

1 屈鐵軍;安棟;;外加鋼筋混凝土梁柱磚砌體房屋抗震性能試驗研究[J];振動與沖擊;2015年04期

2 鄧明科;孫飛;孫宏哲;梁興文;劉煜;朱蕾宏;;鋼框架內填高延性纖維混凝土剪力墻結構滯回性能試驗研究[J];建筑結構學報;2014年12期

3 屈鐵軍;向坤;尹學軍;邵曉巖;;汽輪發(fā)電機基礎抗震性能擬動力試驗研究[J];工程抗震與加固改造;2013年01期

4 安棟;孫昕;屈鐵軍;尹學軍;邵曉巖;;汽輪發(fā)電機組彈簧隔振基礎模型試驗模態(tài)分析[J];北方工業(yè)大學學報;2012年03期

5 尹學軍;王偉強;谷朝紅;沙曾p，

本文編號：1814022