( 1. 上海交通大學(xué) 機(jī)械與動(dòng)力工程學(xué)院, 上海 200030；
2. 中南大學(xué) 材料科學(xué)與工程學(xué)院, 長沙 410083；
3. 同濟(jì)大學(xué) 機(jī)械工程學(xué)院， 上海 200092)
摘 要: 研究了有限體積分步求解方法，實(shí)現(xiàn)了各分步有限體積模擬系統(tǒng)的數(shù)據(jù)傳遞和信息繼承。 針對薄壁門窗型材制品壁薄且縱向尺寸大的特點(diǎn)， 采用了有限體積分步模擬方法對其擠壓成形進(jìn)行了模擬， 并與有限元模擬、有限體積一步模擬進(jìn)行了對比。 結(jié)果表明： 1）有限元模擬往往會(huì)因?yàn)榫W(wǎng)格重劃分問題造成模擬結(jié)果嚴(yán)重失真； 2）有限體積法一步模擬又對計(jì)算機(jī)資源有較高要求， 往往會(huì)因?yàn)閮?nèi)存不足造成計(jì)算無法進(jìn)行下去； 3） 有限體積分步模擬方法模擬精度最高， 可以很好地解決大尺寸薄壁型材制品擠壓成形的數(shù)值模擬問題。
關(guān)鍵字: 薄壁門窗型材； 擠壓； 有限體積法； 分步模擬； 數(shù)據(jù)傳遞
（ 1. School of Mechanical Engineering,
Shanghai Jiaotong University, Shanghai 200030, China;
2. School of Materials Science and Engineering,
Central South University, Changsha 410083, China;
3. School of Mechanical Engineering, Tongji University, Shanghai 200092, China）
Abstract: The key technology for multi-stage finite volume method simulation was studied, and data transfer and information inheritance between successive stages were fulfilled. In accordance with the characteristics of an aluminum window part with thin wall and relatively large longitudinal dimension, its extrusion process is simulated with finite volume multi-stage simulation method, whose result is compared with those of finite element method and finite volume one step method. The simulation results reveal that the finite element method results in distorted product shape due to frequent mesh rezoning; computation with one step finite volume method needs too much computer memory; the multi-stage finite volume method can solve the memory-shortage problem in numerical simulation of large-dimensionally thin-walled aluminum profile parts and the highest accuracy is obtained.
Key words: thin-walled aluminum decoration profile; extrusion; finite volume method; multi-stage simulation; data transfer
