本文選題：瀝青混合料　切入點：黏彈性　出處：《林業(yè)工程學(xué)報》2017年03期

【摘要】：黏彈性是澆筑式瀝青混合料的重要特性之一。首先利用Laplace變換,將修正Burgers模型的黏彈性參數(shù)轉(zhuǎn)化為剪切松弛模量的Prony級數(shù)形式,以滿足ANSYS等有限元軟件的黏彈性材料參數(shù)輸入要求,并通過ANSYS模擬驗證了公式的正確性;對澆筑式瀝青混合料進(jìn)行了單軸貫入蠕變試驗;利用Matlab軟件對蠕變?nèi)崃窟M(jìn)行擬合,獲得了修正Burgers模型表征的黏彈性參數(shù);基于推導(dǎo)的Prony級數(shù)公式,對單軸貫入蠕變試驗進(jìn)行有限元模擬,并進(jìn)行了實際試驗的模型應(yīng)力修正。結(jié)果表明:有限元模擬結(jié)果與理論計算結(jié)果的相對誤差小于1%,驗證了本研究推導(dǎo)的Prony級數(shù)公式的可靠性;應(yīng)力修正后,有限元模擬結(jié)果與試驗數(shù)據(jù)的相對誤差能控制在6%以內(nèi),顯著提高了模型參數(shù)識別精度。
[Abstract]:Viscoelasticity is one of the important properties of pouring asphalt mixture. Firstly, using Laplace transform, the viscoelastic parameters of modified Burgers model will be transformed into Prony series shear relaxation modulus of viscoelastic materials, in order to meet the input parameters of ANSYS finite element software, and through ANSYS simulation verify the correctness of the formula; the uniaxial penetration creep test of pouring asphalt mixture; fitting the creep compliance by using Matlab software, obtained the characterization of viscoelastic parameters of the modified Burgers model; Prony series formulas based on the finite element simulation of uniaxial penetration creep test, and the actual test model of stress correction. The results showed that the relative error finite element simulation results and theoretical results is less than 1%, to verify the reliability of Prony series formula derived in this study; stress correction, finite element simulation results. The relative error of the fruit and the experimental data can be controlled within 6%, and the accuracy of the model parameter identification is greatly improved.

【作者單位】： 河海大學(xué)土木與交通學(xué)院;南京重大路橋建設(shè)指揮部;
【基金】：國家自然科學(xué)基金(51478163) 江蘇省自然科學(xué)基金青年項目(BK2012412) 中央高�；究蒲袠I(yè)務(wù)經(jīng)費專項資金(2015B17614) 浙江省交通科學(xué)計劃(2014W01,2014H27)
【分類號】：U414
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本文編號：1676365