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  本文關鍵詞： 高加水室 結(jié)構(gòu)應力 應變測試 數(shù)值模擬　出處：《西南交通大學》2017年碩士論文　論文類型：學位論文

【摘要】：我國的電力供應目前仍然以火力發(fā)電為主,嚴重依賴煤炭。與傳統(tǒng)的發(fā)電技術不同,超超臨界發(fā)電技術熱循環(huán)效率更高,排放污染更少,是一種更加高效和先進發(fā)電技術。高壓加熱器是超超臨界火力發(fā)電機組熱力循環(huán)系統(tǒng)中的一個非常重要的組成設備,它的穩(wěn)定運行是火力發(fā)電機組安全、經(jīng)濟運行的保障和前提。高加水室是高壓加熱器的主要承壓部件,其汽水壓力參數(shù)高,工況惡劣。論文采用應變電測試驗方法和數(shù)值模擬方法,對高加水室的結(jié)構(gòu)強度進行研究。應變電測試驗是與高壓加熱器產(chǎn)品的出廠水壓試驗同步進行,通過粘貼在高加水室結(jié)構(gòu)內(nèi)、外壁的電阻應變計,運用應變數(shù)據(jù)采集儀器讀取在高液壓工況下應變計的數(shù)據(jù),測量得到高加水室封頭上開孔及其影響區(qū)域的應力;分析試驗數(shù)據(jù)、并依據(jù)GB/T 16507.4-2013《水管鍋爐-受壓元件強度計算》標準研究水室結(jié)構(gòu)的強度,判斷其最高承載壓力。參照高壓加熱器產(chǎn)品結(jié)構(gòu),按實際測量的真實尺寸建立高加水室結(jié)構(gòu)的三維模型,采用有限元軟件MSC.Patran作為前后處理器,以MSC.Nastran為數(shù)值求解器,模擬分析高加水室模型,用JB/T 4732《鋼制壓力容器—分析設計標準》的規(guī)定為判據(jù),對有限元數(shù)值模擬的結(jié)果進行水室結(jié)構(gòu)的強度評定。論文通過試驗數(shù)據(jù)與模擬結(jié)果進行比對分析,研究了超超臨界機組用高加水室的應力分布的典型特征和表現(xiàn)規(guī)律,對加熱器的結(jié)構(gòu)強度進行了計算校核和實驗驗證,為同類結(jié)構(gòu)的強度評定提供了技術檢驗參考,為超規(guī)范設計提供了新的思路。
[Abstract]:The power supply in China is still dominated by thermal power generation and relies heavily on coal. Unlike traditional power generation technology, ultra-supercritical power generation technology has higher thermal cycle efficiency and less emission pollution. High pressure heater is a very important component equipment in the thermal cycle system of ultra supercritical thermal power generating unit, and its stable operation is the safety of thermal power generating set. High water chamber is the main pressure part of high pressure heater, its steam pressure parameter is high, the working condition is bad. The paper adopts strain electric test method and numerical simulation method. The strain electric test is carried out synchronously with the water pressure test of the high pressure heater products. The strain gauge is attached to the structure of the high water feeding chamber and the external wall of the resistor strain gauge. Using the strain data acquisition instrument to read the strain gauge data under the high hydraulic condition, the stress of the hole on the head of the high water filling chamber and its affected area is measured. The test data are analyzed and the strength of water chamber structure is studied according to GB/T 16507.4-2013 "strength calculation of water-tube boiler-pressure element". According to the product structure of high pressure heater, the three-dimensional model of high water chamber structure is established according to the actual measured size. The finite element software MSC.Patran is used as the front and rear processor and MSC.Nastran as the numerical solver to simulate and analyze the model of high water adding chamber. The criterion is JB/T 4732 "Steel pressure vessel-Analytical Design Standard". The results of finite element numerical simulation are used to evaluate the strength of the water chamber structure. The typical characteristics and performance rules of stress distribution of high water feeding chamber used in ultra-supercritical unit are studied. The structural strength of heater is calculated and verified by experiments. It provides a technical reference for the strength evaluation of similar structures and a new way of thinking for the design of supercode.
【學位授予單位】：西南交通大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TM621.3

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