木质复合门结构优化仿真分析研究  

Simulation Analysis of Wood-Based Composite Door Structure Optimization

作　　者：乔雅煊 李贤军[1] 吕建雄[1] 王海东 郝晓峰[1] QIAO Ya-xuan;LI Xian-jun;LV Jian-xiong;WANG Hai-dong;HAO Xiao-feng(College of Material and Science of CSUFT,Changsha 410004,Hunan,P.R.China;Suofeiya Home Collection Co.,Ltd.,Guangzhou 510000,Guangdong,P.R.China)

机构地区：[1]中南林业科技大学材料科学与工程学院,湖南长沙410004 [2]索菲亚家居股份有限公司,广东广州510000

出　　处：《林产工业》2023年第7期34-41,共8页China Forest Products Industry

基　　金：湖南省自然科学基金项目:重组竹热压成型全时域热质迁移与流变互作机制研究(S2023JJMSXM2242);国家自然科学基金青年科学基金项目:木材微波精准爆破的水热迁移与破膜机理研究(31700486)。

摘　　要：门扇变形是木质复合门在制造和使用中存在的主要质量问题之一。基于木质复合门基材LVL和MDF的湿膨胀系数,结合有限元数值模拟仿真定量分析了7种木质复合门门扇组坯方案在湿度环境变化下的吸湿变形规律,并对门扇结构进行优化。结果表明:22 mmMDF厚度方向湿膨胀系数是5.7 mm的1.1倍;厚度对LVL湿膨胀系数影响不显著,但同一厚度LVL顺纹、横纹和厚度方向的湿膨胀系数差异显著;门扇框架结构的变形主要集中在未固定侧边梃区域,优化组坯方式可以有效抑制整个框架结构的变形;随着表板厚度和框架厚度的不断增加,门扇的整体变形量呈先减小后增大的趋势;25 mm宽LVL单元条组坯方案的变形均小于40 mm宽单元条组坯方案的变形。获得优化门扇组坯结构方案为:表板厚度为3 mm,框架厚度为28 mm,单边宽度为75 mm。研究为木质复合门结构优化提供了新思路。One of the primary issues with the production and use of wood-based composite doors is deformation.Based on the moisture expansion coefficients of LVL and MDF in this study,the moisture absorption and deformation patterns of seven wood-based composite door schemes were analyzed in conjunction with finite element numerical simulation,and the mechanism of the deformations was investigated to get an optimal scheme.According to the results,the moisture expansion coefficient of 22 mm MDF was 1.1 times greater than that of 5.7 mm.The moisture expansion coefficient of LVL was unaffected by thickness,but the moisture expansion coefficients along the grain,across the grain,and in the thickness direction were noticeably different in LVL of the same thickness.The area of the door leaf frame structure's unfixed side stile was where the deformation was primarily concentrated.The deformation of the entire door frame structure could be successfully suppressed by optimizing the assembly combination method.The deformation of the door leaf first decreased and then increased as the surface panel and frame thickness increased.The 25 mm wide unit strip showed less deformation than the 40 mm wide unit strip.The best of the frame assembly solution was obtained when the thickness of the surface panel was 3 mm,the thickness of the frame was 28 mm and the width of one side was 75 mm.This study provides a new idea for structural optimization of wood-based composite door.

关 键 词：木质复合门 门扇 有限元分析 结构优化 ABAQUS 

分 类 号：TS653[轻工技术与工程]