本文關鍵詞： 板框式液壓機 靜力分析 模態(tài)分析 響應曲面 結構尺寸優(yōu)化　出處：《合肥工業(yè)大學》2017年碩士論文　論文類型：學位論文

【摘要】：彈性成形壓機(又稱橡皮墊成形壓機)多應用于航天、航空、醫(yī)療等多品種小批量試件的制造領域,它具有低模具成本、生產靈活性強等突出優(yōu)點。大噸位的彈性成形壓機的機身一般采用框架結構,由多片熱軋厚鋼板組成,沒有焊接或機械接頭,機身的安全性和緊湊性好。為探索非預應力的整體板框機架式液壓機的結構特點和機械性能,本課題以10MN彈性成形壓機為研究對象。根據液壓機的基本設計原理和主要技術參數,設計液壓機的三維結構,由于機身板框安裝方式的不同,可擬定兩種結構形式。運用ANSYS Workbench建立液壓機的有限元分析模型,在中心載荷工況和偏心載荷工況下,分別對液壓機的兩種結構模型進行靜力分析,得出它們的應力和應變分布云圖。對比靜力分析,工況Ⅳ為液壓機工作時最惡劣的情況,此時模型一的最大形變量和最大應力均小于模型二的最大應力;而在中心載荷情況下,兩者恰好相反。對液壓機的兩種結構模型進行模態(tài)分析,得出它們的前六階固有頻率和對應的振型。對比模態(tài)分析,模型一和模型二的模態(tài)振型基本類似,但各階固有頻率和振幅相差明顯。建立液壓機的有阻尼三自由度力學模型,結合能量法對彈性成形液壓機進行振動分析。采用響應曲面優(yōu)化分析的方法,以液壓機機身質量最小和第一階固有頻率最大為第一種情況下的設計目標,以機身質量最小為第二種情況下的設計目標,分別對兩種結構模型進行尺寸優(yōu)化。并結合優(yōu)化所得的2D曲線,分析設計變量對各狀態(tài)變量的影響規(guī)律。
[Abstract]:Elastic forming press (also called rubber pad forming press) is widely used in many fields such as aerospace, aviation, medical treatment and so on. It has low die cost. The frame structure of the large tonnage elastic forming press is generally adopted, which is composed of several hot rolled thick steel plates without welding or mechanical joints. The safety and compactness of the fuselage are good. In order to explore the structural characteristics and mechanical properties of the unprestressed integral plate and frame machine frame hydraulic press. According to the basic design principle and main technical parameters of the hydraulic press, the three-dimensional structure of the hydraulic press is designed, because of the different installation mode of the frame and plate of the fuselage. The finite element analysis model of hydraulic press can be established by using ANSYS Workbench, under the condition of center load and eccentric load. By static analysis of two kinds of structural models of hydraulic press, the distribution of stress and strain is obtained. Compared with static analysis, working condition 鈪，

本文編號：1464857