Then, based on the CR formulation, the internal force vector and tangent stiffness matrix of large rotation and small strain space bar and plane beam element are deduced.
其次，基于CR列式法推导出了大旋转小应变空间杆单元及平面梁单元的内力矢量及切线刚度矩阵；
Structural elements contain bar, plane beam, space beam, triangular and rectangular plates with membrane stresses, rectangular plate element with bending deformations.
结构元素包括杆元、平面梁元、空间梁元、平面三角板元、平面矩形板元和弯曲矩形板元等。
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 presents a study of linear stability in plane of cable-arch structure by using finite element approach with beam and cable elements.
本文应用有限单元法对索-拱杂交结构平面内线性稳定性研究。
A new optical element called Glass Ring is introduced in this paper. It can transform laser beam into a laser beam plane.
介绍一种新型的光学元件，它可把一束激光变换成一个两维的激光平面。
Plane linkage element is used to calculate bearing capacity of the structure, and 3D solid element is used to simulate response of the beam to load.
采用平面杆系单元进行结构的承载力检算，采用3D实体单元进行梁体荷载响应模拟。
According to the finite element method for the plane curved members, a program of time-dependent analysis for prestressed concrete curved beam bridges is developed.
用平面曲杆有限元法编写、调试了预应力混凝土曲线架桥的时效分析程序。
Secondly, the equivalent plane truss element analysis program of plane stress problem is worked out, by which cantilever beam, simple beam and perforated wall are analyzed.
其次，编制了平面应力问题等效铰结平面桁架单元有限元法分析计算机程序。
Secondly, the equivalent plane truss element analysis program of plane stress problem is worked out, by which cantilever beam, simple beam and perforated wall are analyzed.
其次，编制了平面应力问题等效铰结平面桁架单元有限元法分析计算机程序。
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