An isotropic viscoelastic model coupled with hydrothermal effects 含濕熱效應(yīng)的各向同性耦合粘彈模型
The finite - element simulation analysis of viscoelastic model of surrounding rock 圍巖粘彈性模型有限元模擬分析
In the appendix , the author of the present thesis included the three parameters of schapery ' s viscoelastic model based on the work of roy et al 的大小作者還在roy等計(jì)算模型的基礎(chǔ)上,修正了他們略去schpaery單積分粘彈性本構(gòu)模型中的兩個(gè)參數(shù)的研究工作。
Based on the dropping impact dynamics characteristic under non damage condition , a non - linear viscoelastic model was develop to describe of pear the rheological characteristic 摘要基于梨果實(shí)非損傷條件下的跌落沖擊動(dòng)力學(xué)特征,采用非線性黏彈性本構(gòu)模型表征其流變特性。
The specimen of the test was stimulated by viscoelastic model and the wheel load was stimulated by special function , which are brought into viscoelastic equation . after solving the equation , we can work out the theoretical answer . thus we can figure out the ds and the deformation curve 本文應(yīng)用粘彈性理論研究車轍試驗(yàn),應(yīng)用粘彈性模型模擬車轍試驗(yàn)的試件,擬合車轍試驗(yàn)的輪載,帶入粘彈性本構(gòu)方程,獲得理論解,從而獲得車轍試驗(yàn)的變形曲線和動(dòng)穩(wěn)定度值。
The result indicates that the nonlinear elastic model is appropriate for better foundation condition , while the viscoelastic model is appropriate for worse foundation condition . according to the uniqueness of back analysis solution , it is put forward a method for the back analysis of layer - wise and section - wise iteratively . which is showed advantage by the calculation result 分析表明,非線性彈性模型一般適合地基較好的情況,而對(duì)于地基較差的情況宜采用粘彈性模型;針對(duì)反演計(jì)算解的唯一性問(wèn)題,提出了分層分部反演迭代的計(jì)算方法,計(jì)算表明,該方法具有一定的優(yōu)越性。
Numerical viscoelastic modeling for porphyroclast rotation in ductile shear zones is done by a viscoelastic finite element program based on detailed investigation to three ductile shear zones , the taihangshan mountains , north china . in this model porphyroclast garnet is assumed as isotropic elastic material with small elastic deformation , while the matrix quartz , feldspar as viscous fluid maxwell material which has increasing deformation with time . the viscosity of matrix is supposed to be 10 采用粘彈性力學(xué)分析程序?qū)μ猩礁菲降貐^(qū)剪切帶中斑晶旋轉(zhuǎn)問(wèn)題進(jìn)行了有限元數(shù)值模擬。在計(jì)算模型中假定:石榴石斑晶為彈性材料,在應(yīng)力作用下只產(chǎn)生很小的彈性變形石英長(zhǎng)石質(zhì)的基質(zhì)部分為粘彈性材料,它具有隨時(shí)間變形不斷增大的特性。
The internal damping forces and the nonlinear elastic forces in the analytical form are deduced from the kelvin . voigt viscoelastic model . a smart method basing on the concept of period number is proposed for evaluating periodic solutions of the nonlinear system and determining the periodic . doubling bifurcation points ( 2 )建立了一個(gè)4dof單跨彈性轉(zhuǎn)子在非線性油膜力、非線性內(nèi)阻力和非線性彈性力作用下的非線性動(dòng)力學(xué)模型,提出了求周期解的數(shù)值計(jì)算方法,以及計(jì)算周期解周期數(shù)及分岔點(diǎn)的算法。
Under the assumptions of non - convexity and non - degeneration , it is proved that the solutions of the initial - boundary problem to this viscoelastic model tend towards the travelling wave solution of the corresponding cauchy problem time - asymptotically for zero boundary speed and small initial perturbation by a weighted energy method 對(duì)粘彈性模型,用權(quán)能量方法證明了在非凸非退化的情形下,當(dāng)邊界速度為0 ,初始值具有小擾動(dòng)時(shí),具初邊值問(wèn)題的解收斂于相應(yīng)的柯西問(wèn)題的行波解。