本文選題：水工結(jié)構(gòu)工程 + 有限元法　； 參考：《南水北調(diào)與水利科技》2017年01期

【摘要】：有限元數(shù)值計算在水利工程中運用廣泛,其計算精度和計算誤差是需要考慮和控制的重要問題,對其進行研究可為有限元法在水利設(shè)計和復核中提供技術(shù)支撐。以重力壩為研究載體,根據(jù)壩體荷載合力值與有限元計算的壩基面內(nèi)力值(壩基面應力積分值)的平衡條件,分析有限元應力計算誤差的影響因素,提出減小誤差的措施。研究結(jié)果表明:在同一受力狀態(tài)下,提取應力的對象不同計算誤差不同,需針對所研究的問題及誤差控制要求合理選擇相應提取應力的對象;將緊接壩體的薄層地基保持與壩體相同的模型尺寸和約束條件,可充分減小壩基面有限元應力計算誤差;合理選擇模型網(wǎng)格尺寸、地基模擬范圍、應力提取路徑的條數(shù)、提取點間距,可在不消耗過量的計算資源和時間下滿足精度要求。研究成果可為控制類似結(jié)構(gòu)的有限元計算誤差提供參考。
[Abstract]:Finite element numerical calculation is widely used in water conservancy engineering, and its calculation accuracy and error are important problems to be considered and controlled. The study of finite element method can provide technical support for finite element method in water conservancy design and review. Taking gravity dam as the research carrier, according to the balance condition between the load force value of the dam body and the stress integral value of the dam foundation surface calculated by the finite element method, the influencing factors of the finite element stress calculation error are analyzed, and the measures to reduce the error are put forward. The results show that: under the same stress state, the different calculation errors of the stress extraction objects are different, and the corresponding stress extraction objects should be reasonably selected according to the problems studied and the error control requirements. By keeping the thin layer foundation immediately behind the dam body with the same model size and constraint conditions as the dam body, the finite element stress calculation error of the dam foundation surface can be fully reduced, the model mesh size, the foundation simulation range and the number of strips of the stress extraction path can be reasonably selected. The distance between the extracted points can meet the precision requirements without consuming too much computing resources and time. The research results can provide a reference for controlling the finite element calculation error of similar structures.
【作者單位】： 西安理工大學水利水電學院;國網(wǎng)新疆電力公司阿克蘇供電公司;
【基金】：國家自然科學基金項目(51579208;51409207;51309190) 中央財政支持地方高校發(fā)展專項(106-5X1205)~~
【分類號】：TV223

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1 王意,鄭賢淑,金俊澤;鑄件凝固進程數(shù)值模擬計算誤差分析[J];大連理工大學學報;1993年02期

2 李家[，

本文編號：1921210