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,非线性弹性模型一般适合地基较好的情况,而对于地基较差的情况宜采用粘弹性模型;针对反演计算解的唯一性问题,提出了分层分部反演迭代的计算方法,计算表明,该方法具有一定的优越性。
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 采用粘弹性力学分析程序对太行山阜平地区剪切带中斑晶旋转问题进行了有限元数值模拟。在计算模型中假定:石榴石斑晶为弹性材料,在应力作用下只产生很小的弹性变形石英长石质的基质部分为粘弹性材料,它具有随时间变形不断增大的特性。
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 )建立了一个4dof单跨弹性转子在非线性油膜力、非线性内阻力和非线性弹性力作用下的非线性动力学模型,提出了求周期解的数值计算方法,以及计算周期解周期数及分岔点的算法。
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 对粘弹性模型,用权能量方法证明了在非凸非退化的情形下,当边界速度为0 ,初始值具有小扰动时,具初边值问题的解收敛于相应的柯西问题的行波解。