Method for computing the element restoring force, rather than the stiffness matrix, is the most important factor that determines the accuracy of a geometric nonlinear finite element problem.
几何非线性单元的精度主要决定于单元恢复力的计算方法，刚度矩阵对单元精度的影响很小。
Employing the virtual displacement principle and considering constraint conditions of material interface, the stiffness matrix and equivalent load vector for this element are established.
应用虚位移原理和结合考虑材料交界面上的约束条件，文章建立了接触单元的刚度矩阵和等效荷载向量。
The super element stiffness matrix and the stiffness contribution of substructures to the whole structure are developed.
推导了超级元刚度矩阵及子结构参与协同承载时对整体结构的刚度贡献。
This static cable element stiffness matrix has a high accuracy since it comes from the analytic solution of a parabolic cable.
该静刚度矩阵来自抛物线索的解析解，具有很高的精度，明显比悬链线索单元简化了许多。
Stiffness matrix of the model and element stiffness is provided.
推导了模型的单元刚度矩阵和各杆件的刚度。
Stiffness matrix of the model and element stiffness was developed.
推导了模型的单元刚度矩阵和各杆件的刚度。
A formula based on the interpolation for the rank of the element stiffness matrix is presented, and some reduced integration elements are examined.
得到了根据插值函数来计算刚度矩阵秩的计算公式，并对几种降阶积分单元进行了验算。
The stiffness matrix of semi-rigid steel frames and the fixed end moment are deduced, based on the connection element method incorporating the effects of joint flexibility.
采用连接单元法，考虑连接柔性的影响，推导出半刚性框架梁柱的刚度矩阵及半刚性梁的固端弯矩。
To solve the problem that the single structure stiffness matrix caused by the too big dispersion of element thickness between different levels, it proposed the adjustive method of relevant parameters.
为解决各层优化单元厚度相差太大，易造成结构刚度矩阵奇异的问题，提出对相应参数的调整方法。
The precise tangent stiffness matrix of space cable element is derived in this paper by using equilibrium equation.
本文采用状态平衡方程推导出用超越函数表示的空间索单元切线刚度矩阵的精确表达式。
In the finite element simulation of foundation pit excavation, the stiffness matrix of soil, the external loads and the excavation load are changed with the increasing depth.
在对基坑开挖的有限元模拟中，土体刚度矩阵、外荷载和开挖荷载等都随开挖深度的变化而变化。
By using the moment-curvature relationships of the member section, the inelastic element stiffness matrix is derived directly from the slope-deflection equation of clastic member.
利用杆件截面的弯矩—曲率关系，可以直接由弹性杆件的转角—位移方程建立单元的非线性刚度矩阵。
Firstly, the links of the plane five-bar linkage mechanism is simulated by beam element, the mass matrix, stiffness matrix of linkage mechanism and elastic dynamic model of system are established.
首先对弹性五杆机构进行有限元分析，通过机构梁单元节点位移间的关系，建立起弹性五杆机构单元质量矩阵与刚度矩阵以及弹性动力学模型。
This paper introduces a finite element method of the plane trusses with elastic node. The element stiffness matrix and loading matrix are calculated in detail.
研究了弹性结点有限元方法，详细导出了弹性结点杆件的单元刚度矩阵和常见荷载列阵。
The stiffness matrix of synthetic dual plate-spring interlayer element is deduced.
导出了双层板―性夹层的综合单元刚度矩阵。
And the corresponding thin-walled element stiffness equation was formulated. The apparent formulation of element stiffness matrix under the local coordination was attained.
并建立了相应的薄壁单元刚度方程，从而得出了局部坐标系下单元刚度矩阵的显式。
In this paper, a new type of elements and the stiffness matrix have been developed, which can be used to eliminate the singularity in the finite element model such as space truss and frame.
本文提出了一个用于消除空间杆梁结构有限元模型中的无刚度“奇点”的元素及相应的刚度矩阵计算公式。
The type of hysteresis loops can arbitrarily be chosen, and the corresponding element stiffness matrix can be built up in a simple way.
弯矩—曲率恢复力曲线可以是任意的，而相应的单元刚度矩阵的建立较为简单。
It is proved that the stiffness matrix of the finite element solution is a block diagonal matrix and its elements are some symmetric and block circulant submatrices.
证明了有限元求解的刚度矩阵是一个块对角阵，且其子矩阵是某种对称、块循环矩阵。
In the paper authors'll derive element stiffness matrix, mass matrix and formulas for computation of inner forces.
本文将演引组合单元刚度矩阵、质量矩阵及内力计算公式。
By this way the element stiffness matrix can be decomposed into a series of matrices with respect to assumed strain modes.
精化杂交法可以使单元的应变能按假定的应变模式分解，由此得到相应的分解的单元刚度矩阵，而且常常可以推出显式。
So the form of the element stiffness matrix is analyzed, a method which may realize the real time computation of element stiffness matrix based on the BP net is proposed.
分析了单元刚度矩阵的组成，提出用BP网络来实现单刚矩阵的实时计算方法。
As a result, the element tangent stiffness matrix is symmetric and is updated by using the total values of the nodal variables in an incremental solution procedure.
因而，得到的单元切线刚度矩阵是对称的，此外在增量求解过程中用节点变量的全量进行更新。
Elements by the highly-accuracy six-node triangular element are divided. Stiffness matrix and mass matrix of sandwich panel are established and then deduced dynamical equations of finite elements.
应用高精度的六节点三角形单元进行单元划分，建立复合夹层板的刚度矩阵、质量矩阵并推导有限元动力学方程。
In finite element analysis, the bandwidth of the whole stiffness matrix is reduced by optimizing the node numbering, thereby the needed memory space is saved and the calculation time is reduced.
在有限元计算过程中，可通过优化节点编号来减少整体刚度矩阵的带宽，从而节约存储空间，减少有限元分析的计算时间。
And the reduced linear elastic stiffness matrix is formulated for the macro-element of planar beam attached with springs at both ends through static reduced technique.
采用静力缩减方法，由平面梁单元弯曲平衡方程推导出两端带扭簧的杆件宏单元缩减刚度矩阵。
The elastic stiffness matrix and the geometrical stiffness matrix for a element of cylindrical shells been established by the relation ship of strain displacement in a lange deflection.
理论上采用大挠度的应变——位移关系，建立了圆柱壳单元的弹性刚度矩阵和几何刚度矩阵。
Using the principle of virtual displacement and a rigid-plastic constitutive model, the stiffness matrix of the new contact element was deduced.
采用虚位移原理和刚塑性本构模型，推导了接触单元的刚度矩阵。
Using the principle of virtual displacement and a rigid-plastic constitutive model, the stiffness matrix of the new contact element was deduced.
采用虚位移原理和刚塑性本构模型，推导了接触单元的刚度矩阵。
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