本文關(guān)鍵詞： 板框式液壓機(jī) 靜力分析 模態(tài)分析 響應(yīng)曲面 結(jié)構(gòu)尺寸優(yōu)化　出處：《合肥工業(yè)大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：彈性成形壓機(jī)(又稱橡皮墊成形壓機(jī))多應(yīng)用于航天、航空、醫(yī)療等多品種小批量試件的制造領(lǐng)域,它具有低模具成本、生產(chǎn)靈活性強(qiáng)等突出優(yōu)點(diǎn)。大噸位的彈性成形壓機(jī)的機(jī)身一般采用框架結(jié)構(gòu),由多片熱軋厚鋼板組成,沒有焊接或機(jī)械接頭,機(jī)身的安全性和緊湊性好。為探索非預(yù)應(yīng)力的整體板框機(jī)架式液壓機(jī)的結(jié)構(gòu)特點(diǎn)和機(jī)械性能,本課題以10MN彈性成形壓機(jī)為研究對(duì)象。根據(jù)液壓機(jī)的基本設(shè)計(jì)原理和主要技術(shù)參數(shù),設(shè)計(jì)液壓機(jī)的三維結(jié)構(gòu),由于機(jī)身板框安裝方式的不同,可擬定兩種結(jié)構(gòu)形式。運(yùn)用ANSYS Workbench建立液壓機(jī)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(duì)液壓機(jī)的兩種結(jié)構(gòu)模型進(jìn)行靜力分析,得出它們的應(yīng)力和應(yīng)變分布云圖。對(duì)比靜力分析,工況Ⅳ為液壓機(jī)工作時(shí)最惡劣的情況,此時(shí)模型一的最大形變量和最大應(yīng)力均小于模型二的最大應(yīng)力;而在中心載荷情況下,兩者恰好相反。對(duì)液壓機(jī)的兩種結(jié)構(gòu)模型進(jìn)行模態(tài)分析,得出它們的前六階固有頻率和對(duì)應(yīng)的振型。對(duì)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(jī)的有阻尼三自由度力學(xué)模型,結(jié)合能量法對(duì)彈性成形液壓機(jī)進(jìn)行振動(dòng)分析。采用響應(yīng)曲面優(yōu)化分析的方法,以液壓機(jī)機(jī)身質(zhì)量最小和第一階固有頻率最大為第一種情況下的設(shè)計(jì)目標(biāo),以機(jī)身質(zhì)量最小為第二種情況下的設(shè)計(jì)目標(biāo),分別對(duì)兩種結(jié)構(gòu)模型進(jìn)行尺寸優(yōu)化。并結(jié)合優(yōu)化所得的2D曲線,分析設(shè)計(jì)變量對(duì)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(hào)：1464857