A hamiltonian system , the duality system , of the viscoelastic theory is established in cylinders via the investigation 論文通過研究,建立了粘彈性柱體問題的哈密頓基本理論體系,即對偶體系。
In the paper , viscoelastic theory and ann ( artificial neural network ) are applied to estimate ds and draw the curve of deformation 本文將粘彈性理論和人工神經(jīng)元網(wǎng)絡(luò)應(yīng)用于車轍試驗動穩(wěn)定度的預(yù)估。
Viscoelastic theory is a boundary science that depends on the development of mechanic and material science , it is one of the important parts of continuum mechanic 粘彈性理論是在力學(xué)和材料之間發(fā)展起來的邊緣科學(xué),是連續(xù)介質(zhì)力學(xué)的一個重要組成部分。
Preliminary research on creep and dynamic characteristics , which are two important properties of asphalt concrete cores for embankment dams , through triaxial compression creep tests and dynamic triaxial test with the aid of the viscoelastic theory and the soil dynamics theory 本文通過三軸壓縮蠕變試驗和振動三軸試驗,借助粘彈性理論和土動力學(xué)理論,對土石壩瀝青混凝土心墻材料的兩個重要性質(zhì)? ?蠕變性能和動力特性進行了初步的研究。
At present , many important development on the studies of viscoelastic theory have been made by the efforts of scholars home and abroad , linear viscoelasticity theory has sufficiently developed , while nonlinear viscoelastic theory is still under developed by the reason of difficulties in experiment and mathematics 目前,國內(nèi)外學(xué)者在粘彈性理論研究領(lǐng)域取得了許多重要的研究進展,線粘彈性理論已發(fā)展得較為完善,非線性粘彈性理論由于實驗和數(shù)學(xué)上存在的困難尚處于不斷的發(fā)展和完善之中。
Many factors are considered in the study of the nonlinear buckling bearing capacities of the representative concrete filled circular and square steel tube columns , these factors include the sectional form , the slenderness ratio , the steel ratio , and the eccentricity ratio . the comparison between the test and calculating results shows that they have a good agreement . in theoretical investigation of the time - dependent behaviour of cft specimens , based on the three - dimensional viscoelastic theory , this paper proposed the three - dimensional finite element model of creep of core concrete , in which a linear three parameters visoelastic model was adopted 在對鋼管混凝土構(gòu)件極限承載力的分析計算中,本文提出了核心混凝土的三維非線性應(yīng)力?應(yīng)變?nèi)亢驮隽勘緲?gòu)關(guān)系模型,采用完全的拉格朗日表述來考慮與變形歷史有關(guān)的大變形問題,并對長細比、含鋼率和偏心率在較大范圍內(nèi)變化的方、圓鋼管混凝土構(gòu)件的非線性屈曲承載力分別進行了試驗和理論對比分析研究,結(jié)果表明二者符合較好。