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邱煒程 | Khoo Wee Chern
ANSYS結構分析連桿和變速箱外殼(教育版)
ANSYS結構分析連桿和變速箱外殼(教育版)
ANSYS結構分析連桿和變速箱外殼(教育版)
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邱煒程 | Khoo Wee Chern
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Taipei, Taiwan
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工研院開的ANSYS分析課程,模擬分析引擎內部的曲柄和變速箱外殼。 曲柄:曲柄材料為不銹鋼,螺栓為結構鋼,在安全係數為1的情形下,曲軸端軸承最大能承受多少N力,總變形量最大是多少? Sol:設定螺栓與連桿的接觸面為No Separation,曲軸端與連桿的接觸面為Bonded。活塞銷軸承的力分析設定Fixed Support(因為沒有插銷作為力著點,所以改成固定支撐模式),而曲軸端軸承設定成Bearing Load分佈力。利用最佳化的分析,在靜態中曲軸端軸承能承受最大的5000N,最大總變形量0.3mm,最大等效應力110MPa,最小安全係數在1.87以內,屬於安全範圍。 曲柄靜態分析結果連結:https://drive.google.com/drive/folders/1TWlHlZJ0IiSPsWlSOEjFVar_aJRSTydc?usp=sharing 變速箱外殼:材料為結構鋼,外殼以螺栓鎖在其他部件上,變速箱內部最大承受多少壓力?變速箱的最大總變形量多少?在預應力的狀態下,振動模態中的自然頻率是多少? Sol:設定10mm大小的網格進行網格化,透過最佳化的分析,變速箱內部最大能承受0.5MPa的壓力,靜態下的最大總變形量0.53mm,最大等效應力250MPa。在預應力的狀態下,設定變速箱的6組振動模態(524.34Hz、738.65Hz、813.87Hz、977.53Hz、1099.7Hz、1184.5Hz),因為變速箱得承受不同檔位的齒輪嚙合頻率和油壓,用來觀察在外力的激振下所產生的共振問題,可作為在減重或補強的結構設計參考。不過這組變速箱外殼的安全係數為0.99,雖然處於安全範圍的臨界點,但從不同頻率的模態來看發現某處有應力集中現象,需要改變設計來提高安全係數。 變速箱外殼模態分析連結:https://drive.google.com/drive/folders/1jyuUdX09NLEajb_Bjh3LUo8uLpzP74OY?usp=sharing ANSYS原廠和工研院證書:https://drive.google.com/file/d/1Bhm6TDrP1CtHGWDYfUvSOJDntbce49sj/view?usp=sharing https://drive.google.com/file/d/1cIQWwadVuwXqAkBsVutUxWb-DXFFBfqD/view?usp=sharing
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邱煒程 | Khoo Wee Chern
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Published: Mar 3rd 2019
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變速箱
連桿
ANSYS
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