汽车实用技术
汽車實用技術
기차실용기술
PRACTICAL TECHNOLOGY OF AUTOMOBILE
2012年
7期
7-11
,共5页
耐撞性%试验设计%可行方向法%响应面法
耐撞性%試驗設計%可行方嚮法%響應麵法
내당성%시험설계%가행방향법%향응면법
Crashworthiness%Design of Experiment%Feasible Direction Methods%Response SurfaceMethodology
为了提高薄壁结构的耐撞性能，本文提出了一种高效的设计方法。利用二次回归正交组合试验设计方案来选取设计点，在设计点处用有限元法代替传统试验来获取试验数据。然后通过最小二乘法建立了刚性墙最大位移、撞击力峰值和总质量的高精度响应面。综合考虑厚度的变化范围、安全性和轻量化要求，运用可行方向法对建立的响应面进行优化计算，得到了一组最优值。结果表明本文的设计方法具有很高的精度和计算效率，实现了提高薄壁结构耐撞性的目的。同时也为车身复杂结构（如前纵梁、吸能盒等）的耐撞性设计提供理论依据和参考方法。
為瞭提高薄壁結構的耐撞性能，本文提齣瞭一種高效的設計方法。利用二次迴歸正交組閤試驗設計方案來選取設計點，在設計點處用有限元法代替傳統試驗來穫取試驗數據。然後通過最小二乘法建立瞭剛性牆最大位移、撞擊力峰值和總質量的高精度響應麵。綜閤攷慮厚度的變化範圍、安全性和輕量化要求，運用可行方嚮法對建立的響應麵進行優化計算，得到瞭一組最優值。結果錶明本文的設計方法具有很高的精度和計算效率，實現瞭提高薄壁結構耐撞性的目的。同時也為車身複雜結構（如前縱樑、吸能盒等）的耐撞性設計提供理論依據和參攷方法。
위료제고박벽결구적내당성능，본문제출료일충고효적설계방법。이용이차회귀정교조합시험설계방안래선취설계점，재설계점처용유한원법대체전통시험래획취시험수거。연후통과최소이승법건립료강성장최대위이、당격력봉치화총질량적고정도향응면。종합고필후도적변화범위、안전성화경양화요구，운용가행방향법대건립적향응면진행우화계산，득도료일조최우치。결과표명본문적설계방법구유흔고적정도화계산효솔，실현료제고박벽결구내당성적목적。동시야위차신복잡결구（여전종량、흡능합등）적내당성설계제공이론의거화삼고방법。
In order to improve the crashworthiness of the thin-walled structure, this paper proposes a highly efficient method. Through selecting the design points according to quadratic regression orthogonal-composite Design of Experiment, this paper builds the Response Surfaces of the rigidwall＇s maximum displacement, crash peak force and total mass using least square method with these selected design points＇ data which is obtained in Finite Element Method instead of traditional experiment . Taking the range of components＇ thickness, safety and requirement of light weight into consideration, Feasible Direction Methods is applied to optimize these Response Surfaces, producing a group of optimal values. The outcome indicates that the method proposed is highly accurate and efficient, improving the crashworthiness of thin-walled structure and providing a theoretical reference and design method for more complex structures＇ crashworthiness （such as frontal longitudinal beams and crash-box, etc）.
