基于有限元分析的s195柴油機活塞改進設計畢業(yè)論文(已修改)
2025-07-04 22:48 本頁面
【正文】 基于有限元方法的S195柴油機活塞設計[摘要] 本文針對將S195型柴油機的渦流室燃燒室改為直噴式燃燒室,對活塞的結構進行了改進設計。對改進后的發(fā)動機進行了熱力計算和動力計算，將計算所求得的最高爆發(fā)壓力和對應的加速度所產生的慣性力作為活塞最危險工作情況，利用有限元分析軟件ANSYS對其進行機械應力分析，得出活塞應力云圖和變形云圖，根據分析結果，活塞的最大應力和最大位移并沒有超出允許范圍,本設計滿足了改進后發(fā)動機的實際工況。 [關鍵詞] 活塞；ANSYS；內燃機The Design of Piston in S195 Diesel Engine Based on Finite Element MethodAbstract To satify the new condition of swirl chamber being changed into direct injection bustion chamber and improve the fuel economy , the structure of piston in S195 Diesel Engine was redesigned. The thermodynamic and power calculation were done .The bustion chanber and piston ring etc were changed to adjust to the direct injection diesel engine. The maximum outbreak pressure obtained by calculation and the inertial force generated by the corresponding piston acceleration were recognized as the most dangerous working conditions, using ANSYS finite element analysis software for mechanical stress analysis , the piston stress and deformation cloud were obtained . According to the result of the analysis, the maximum stress and maximum displacement of the piston does not exceed the permissible range, the design can meet the actual engine operating conditions.Key words Piston 。 ANSYS 。 Internal Combustion Engine.目錄引言................................................................1...............................1 熱力計算........................................................2 原始參數及己知條件............................................2 選定參數......................................................3 氣缸工作過程計算..............................................3 示功圖繪制...................................................6 動力計算........................................................82． 活塞主要尺寸設計及強度計算......................................11 活塞的工作條件、材料以及設計要求................................11 主要尺寸設計...................................................12 燃燒室尺寸...................................................12 頂岸高度.....................................................13 活塞環(huán).......................................................14 活塞頂厚度...................................................15 裙部長度.....................................................15 銷座設計.....................................................15 活塞強度計算..................................................163. 活塞有限元分析..................................................183．1 三維實體建模...................................................183．2 有限元網格劃分.................................................193．3 機械負荷分析...................................................19 計算工況及載荷確定...........................................19 載荷施加過程.................................................20 有限元分析結果...............................................23結束語 ............................................................26致謝...............................................................27參考文獻...........................................................28引言柴油機廣泛應用于現代農業(yè)，是現代農業(yè)生產所必需的動力機械，涉及農、林、牧、副、漁各部門及其產前、產中、產后各作業(yè)環(huán)節(jié)。柴油機在農業(yè)生產上的應用中，固定式柴油機直接驅動各作業(yè)機械進行作業(yè)，如用于發(fā)電、農副產品加工等固定作業(yè)；移動式柴油機構成拖拉機或各種自走式農業(yè)機械帶動作業(yè)機械或工作部件進行作業(yè)，如用于耕整、播栽、中耕、噴霧、施肥、收獲等田間移動作業(yè)，同時，還承擔著農田基本建設中的挖掘、推土、鏟運、平整、開溝和農用運輸等工作。而S195型柴油機是廣大農村中使用最廣泛的動力機械，它
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