Stiffness matrices of bernoulli beam for plane geometrically nonlinear analysis 伯努力梁平面几何非线性分析的刚度矩阵
Because the stiffness matrices containing relatively few variables formed in the method are real and eliminated only one time in the iteration procedure, the computer resource can be saved. 由于该解法所形成的系数矩阵是阶数较低的实矩阵,而且在迭代过程中只需进行一次消元或分解,从而显著降低了计算机内存和计算时间。
This combination process is called the assemblage of stiffness matrices. 这种组合的过程称为刚度矩阵的装配。
The motion equation of a bridge was established by the finite element method. Particularly, we discussed the element mass matrices and the element stiffness matrices of spatial beam element. 使用有限元法建立桥梁系统的运动方程,讨论了普通空间梁单元的单元刚度矩阵和质量矩阵。
Secant and Tangent Stiffness Matrices and Their Relationship in Geometric Nonlinear Analysis 几何非线性分析中的割线刚度矩阵与切线刚度矩阵及其关系
Some stiffness matrices of special elements such as rubber bearings and components with field are derived from primary-secondary and inverse transform in Structural Matrix Analysis. 其次,利用结构矩阵分析中的主从变换和逆步变换,推演了几个特殊单元的刚度矩阵,包括橡胶隔震层单元和带刚域构件单元;
Comparing with other methods, Transfer Matrix Method is adopted to deduce element stiffness matrices because of its advantage. 通过比较分析,提出采用传递矩阵法推导变截面空间梁单元的弹性刚度矩阵。
The stiffness matrices and mass matrices of the annular elements are obtained by combining analytical and numerical methods. 在单元矩阵的计算过程中将解析方法与数值积分相结合,大大提高了计算精度。
Expressions of mass matrices and stiffness matrices for medium with variable velocities are presented. 对变速介质模型得到了单元质量矩阵和刚度矩阵表达式。
In this paper, the mass and stiffness matrices of circular-beam elements are derived, based on the theory of the finite element method. 本文按有限元法原理给出了圆弧曲梁单元的质量矩阵和刚度矩阵。
Based on the total Lagrangian formulation, the formulas of both secant and tangent stiffness matrices in geometric nonlinear analysis are derived in detail in this paper, and their mathematical relationship is given. 根据T、L描述法,详细推导了几何非线性分析中的割线刚度矩阵和切线刚度矩阵一般表达式,并给出了两者之间的数学关系。
In the paper, partial pole assignment is studied for general vibrating systems with non_symmetric damping and stiffness matrices. 本文讨论具有非对称阻尼、刚度矩阵的一般振动系统多输入部分极点配置问题。
In this paper, a-method using the complex modal theory to identify physical parameters of system with viscous damping is discussed. A procedure is present to calculate the mass, clamping, and stiffness matrices from the measured data in time and frequency domains. 本文论述了在状态空间中应用复模态理论对粘性阻尼系统的物理参数进行识别的一种方法,提出了从测得的时域、频域数据计算质量、阻尼和刚度矩阵的一个过程。
The study also provides a theoretical basis for establishing the elasto-plastic element stiffness matrices of composite beam, which takes the nonlinear factors such as cracks and crushes in concrete and yield in steel into consideration. 本文的研究还为进一步地考虑混凝土开裂、压碎,钢材屈服等非线性因素,建立组合梁单元弹塑性刚度矩阵提供了理论基础。
The elemental stiffness matrices are formed with shape functions and cross-sectional stiffness matrices. 梁柱单元刚度矩阵借助于形函数和截面刚度矩阵形成。
In this paper, the tangent stiffness matrices and the secant stiffness matrices of space trusses are derived with the energy principle in the Total Lagrangian coordinates. 本文在T.L.坐标下,利用能量原理,同时导出了空间杆元精确的割线刚度矩阵和切线刚度矩阵显式。
To improve the precision and efficiency of nonlinear analysis, a three-node beam element based on isoparametric formulations is introduced. The stiffness matrices considering geometric non-linearity and distribution of Gauss points are given. 为了提高非线性分析的计算精度和效率,详细介绍了基于等参公式的三节点梁单元,推导了这种梁单元考虑几何非线性的切线刚度矩阵,并给出了高斯积分点的分布。
This solution scheme reinforces the diagonal elements of stiffness matrices by the regularization of dynamic terms, resulting in the replacement of traditional solution of linear equations by a quasi-inverse method. 该方法使用动力项调整加强了刚度矩阵的对角线元素,因而可以使用一种准逆算法代替传统技术求解线性方程组。
The new updating method is to minimize the error matrix norm under the condition of a quadratic constraint under which the mode orthogonality should be satisfied and the mass and stiffness matrices should be fitted into the eigen equation. 该方法是在质量矩阵和刚度矩阵满足正交性条件和特征方程的约束下,使修正矩阵的范数最小,将模型修正问题转化为一个带二次约束的最小二乘问题。
Geometry analysis during deployment is developed, self equilibrated stress is presented with only prestress, stiffness matrices of a slide pivot element are formulated, and a numerical analysis model is established for the mast. 给出了仅有预应力时自平衡体系受力分析;建立了可滑动-转动单元的刚度矩阵和伸展臂的数值分析模型。
In this paper, the stiffness matrices and load vectors of the beam elements have been transformed so as to get the nodal displacements of each beam element compatible with those of the adjoining shell elements. 本文对梁单元的刚度矩阵和载荷向量进行了变换,以实现各个梁单元的节点位移同与其连接的壳单元的节点位移的协调。
By using the theory about oscillatory matrix, the sign-oscillatory property of stiffness matrices of this system was proved, and necessary and sufficient condition for the system to be positive is obtained completely. 利用振荡矩阵理论,证明了上述系统的刚度矩阵的符号振荡性,完整的导出了正系统的充分必要条件。
The application of coordinate transformation and principle of symmetry to element stiffness matrices has also been discussed. 文中还讨论了单元刚度矩阵的坐标变换和对称性应用。
A fast solving method with p adaptive finite element analysis for structure systems is presented. It is based on the preconditioned conjugate gradient method and the element by element matrix handling techniques as well as a blocked preconditioner constructed with the element stiffness matrices have been used. 提出一种结构系统p自适应有限元分析快速求解算法.该方法以预处理共轭梯度法为基础,采用了逐单元矩阵处理技术和基于单元的分块预处理矩阵技术;
Precise expression of element stiffness matrices and equivalent nodal load vector are derived in curvilinear coordinates based on variational principle. 利用变分原理在曲线坐标系下推导了单元刚度矩阵的显式及其等效结点荷载列阵。
Then the interface stiffness matrices and the mass matrices are assembled serially and the final reduced equations are solved. 再串行组集界面刚度和质量阵,并求解缩减后的整体方程。
According to the method of interval analysis, the interval model of mass matrix and stiffness matrices with the interval variables for structural physical parameters and geometric dimensions is built. 以区间参数压电智能梁结构为研究对象,在材料性能参数和几何尺寸为区间变量时采用区间分析法建立了结构质量矩阵和刚度矩阵的区间模型。
In the paper, the stiffness matrices and the equilibrium equation of the spatial beam elements are built. The finite element model is built and the static calculation is carried out by I-DEAS, one of the finite element software, the static intensity can get. 论文建立了空间梁单元刚度矩阵和结构平衡方程,利用大型有限元软件I-DEAS进行了在役JJ160/41-K型石油钻机井架的有限元建模和静力计算,获得了最大设计载荷作用下的静强度。
Section 3 also presents an efficient computation for dynamic response of systems with time-varying mass, damping and stiffness matrices. 另外本章还提出了一种针对含有时变质量,阻尼和刚度特性结构的动态响应快速算法。
The vibration analysis is made to get the commanding equations, and the dry mode is calculated by transfer matrix method. Then the results of generalized mass, structural damping and stiffness matrices are worked out. 对船体梁进行振动分析,得到振动的控制方程,并利用迁移矩阵方法计算船体梁对称振动和反对称振动的干模态,同时还计算得到了船体的广义质量、阻尼、刚度矩阵。