洪振發臺灣大學：工程科學及海洋工程學研究所許維倫Hsu, Wei-LunWei-LunHsu2007-11-262018-06-282007-11-262018-06-282007http://ntur.lib.ntu.edu.tw//handle/246246/51154台灣高速鐵路於2007年元月通車，串起了西部走廊南北城市，為考量到高達300公里的時速，台灣西部人口的密集以及地形的起伏，全線有73%為高架橋路段。列車行駛時對於橋樑結構有特定週期的衝擊，所以高速列車對於軌道、橋樑造成衝擊的安全性，列車行駛時的安全性與舒適度提升等問題，以及降低高鐵對於環境的影響等皆為重要的研究課題。 本文依據台灣高鐵700T型建立分析模型，以剛體模擬車體，彈簧阻尼系統模擬列車主、次懸吊彈簧，轉向架以樑架模擬，鋼軌與箱型樑則分別以樑元素及板元素來模擬。應用ANSYS程式進行列車及橋樑模型的模態分析，了解其基本動態特性。利用LS-DYNA程式分析列車行駛於高架橋段時的動態反應，及列車對鋼軌、橋樑的衝擊反應，並將列車通過所造成的軌道橋樑加速度反應轉為功率頻譜密度，比較移動列車衝擊所激發的振動頻率與列車基本頻率與結構自然模態的關係。 最後將LS-DYNA分析的結果利用ISO-2631標準來評估列車運行在不同軌道不整度狀況下的垂向及橫向振動舒適度。The Taiwan high speed rail started to operate at January 2007, and connects the cities between the south and north parts of west Taiwan. Because of the high speed train speed of 300 Km/hr, the dense population and the uneven ground level in west Taiwan there are 73% of whole line of high speed rail are constructured on the viaducts, which have the almost uniform span bridges, the rails pads with fixed distance, and therefore the travelling train will impact the rails and bridges with particular frequencies. The promotion for the safety of the tracks and trains are considered as the important problems since the railway was built. Recently, the riding comfort and the influence on the enviroment impacted by travelling high speed train have become big issues for rail dynamic problems. In this thesis, the train model is establishe based on the THSR 700T type train, in which the car body is considered as rigid part, spring and damping element are used for primary and second suspension systems, the bogies are modeled by strong beam element, rail and viaduct are simulated by beam and shell element, respectively. The dynamic characteristic of the train and bridges, are analyzed by modal analysis using ANSYS code. In this paper, we use LS-DYNA to analyze the dynamic response of train, rail, and bridges under travelling train condition. The calculeted acceleration of bridges and rail are transferred to power spectrum density (PSD) to find the singnificant frequencies and their relationship to the nature frequency and modal shape of train and structures. Finally the ISO-2631 standerd was used to evaluate the riding comfort using the analysis results under different class of track irregularity.摘要 I Abstract II 第一章 導論 1 1.1 研究動機與目的 1 1.2 文獻回顧 2 1.3 本文內容 6 第二章LS-DYNA移動物體衝擊引起結構動態反應分析 8 2.1直接積分法 8 2.2 DYNA RAIL簡介 13 第三章 移動物體行經單梁結構動態反應有限元素分析模型檢討 14 3.1分析模型 14 3.2比較分析 19 3.3比較文獻結果 30 第四章 列車通過高架橋樑有限元素分析模型 34 4.1列車模型 34 4.2橋樑及軌道模型 38 第五章 列車與軌道橋樑結構動態特性分析 42 5.1 結構動態特性簡述 42 5.2 車體模態分析 45 5.3 橋樑及軌道模態分析 50 第六章 車橋動態反應 59 6.1 橋梁於單一車廂運動作用下之動態反應 59 6.1.1 橋樑之動態反應 60 6.1.2 鋼軌之動態反應 64 6.1.3 橋樑與鋼軌動態反應比較 66 6.1.4 12節列車行經高架橋之動態反應 72 6.2 列車行經橋樑時之動態反應 78 6.3 軌道橋樑結構加速度反應頻譜分析 88 6.4 軌道不平整模擬 99 第七章 乘車舒適度評估 109 7.1 影響舒適度的振動特性 109 7.2 舒適度評估準則 110 7.3 列車舒適度分析結果 120 第八章 結論與展望 131 8.1 結果討論 131 8.2 未來展望 132 參考文獻 1349420155 bytesapplication/pdfen-US高速鐵路列車舒適度高架橋high speed railtrainriding comfortviaductthesishttp://ntur.lib.ntu.edu.tw/bitstream/246246/51154/1/ntu-96-R94525039-1.pdf