黑龙江科技学院学报
黑龍江科技學院學報
흑룡강과기학원학보
JOURNAL OF HEILONGJIANG INSTITUTE OF SCIENCE & TECHNOLOGY
2012年
1期
64-67
,共4页
薄壁压杆%稳定极限载荷%正交试验设计%多元线性回归
薄壁壓桿%穩定極限載荷%正交試驗設計%多元線性迴歸
박벽압간%은정겁한재하%정교시험설계%다원선성회귀
thin-walled compressive bar%stability ultimate loads%orthogonal experimental design%multiple linear regression
针对薄壁结构在工程中失稳破坏的问题，采用ANSYS软件对薄壁压杆双重非线性稳定进行分析，以薄壁压杆工字形截面尺寸为稳定极限载荷的影响因子，通过正交实验方法设计实验，得到了各个因子影响的显著性。翼缘宽度对稳定极限载荷的影响最大，翼缘厚度次之。最后依据多元线性回归原理建立了薄壁压杆稳定数学模型并对截面进行了优化设计，稳定极限载荷提高了30％。
針對薄壁結構在工程中失穩破壞的問題，採用ANSYS軟件對薄壁壓桿雙重非線性穩定進行分析，以薄壁壓桿工字形截麵呎吋為穩定極限載荷的影響因子，通過正交實驗方法設計實驗，得到瞭各箇因子影響的顯著性。翼緣寬度對穩定極限載荷的影響最大，翼緣厚度次之。最後依據多元線性迴歸原理建立瞭薄壁壓桿穩定數學模型併對截麵進行瞭優化設計，穩定極限載荷提高瞭30％。
침대박벽결구재공정중실은파배적문제，채용ANSYS연건대박벽압간쌍중비선성은정진행분석，이박벽압간공자형절면척촌위은정겁한재하적영향인자，통과정교실험방법설계실험，득도료각개인자영향적현저성。익연관도대은정겁한재하적영향최대，익연후도차지。최후의거다원선성회귀원리건립료박벽압간은정수학모형병대절면진행료우화설계，은정겁한재하제고료30％。
Abstract：Aimed at removing instability and failure associated with thin-walled compressive bar in engineering, this paper features appreciable impact of each factors, based on orthogonal experimental method and by analyzing the bi-nonlinear stability of thin-walled compressive bar, selecting sectional di- mension of I-shaped cross-section as factors of ultimate load of thin-walled compressive bar, and perform- ing the orthogonal experimental design. Flange width exerts the greatest effect on stability ultimate loads, followed by flange thickness. The paper ends with the development of mathematic model of thin-walled compressive bar by multiple linear regression theory and design of section optimum, thus giving a 30%. increase in section and ultimate load.
