4 . the deformation distributed in the developed surface is analyzed , and a lagrange deformation displacement is proposed to describe the deformation of an element 4 、分析了曲面展开单元中的变形情况,提出了表示单元变形的lagrange位移法。
Combined with the structure stiffness method , sacb ( structure analysis program of curved bridge ) is compiled in the environment of visual basic 6 . 0 结合结构矩阵位移法的基本思路,用visualbasic6 . 0编制了曲线梁桥结构分析程序sacb ( structuralanalysisprogramofcurvedbridge ) 。
We also analyze principle of reflective displacement method ( rdm ) to estimate velocity of the aircraft . then the improved rdm ( irdm ) which can be applied in uwb sar is proposed 分析了反射位移法( rdm )估计载机运动速度的原理,进而提出了改进rdm ( irdm )算法,以克服rdm在uwbsar应用中存在的问题。
Based on matrix displacement method for arch structure and fiber element method for concrete - filled steel tube arch bridge , the solid - beam method for concrete - filled steel tube arch bridge was presented 摘要本文结合拱结构计算的矩阵位移法和钢管混凝土拱桥分析的纤维单元法,特提出钢管混凝土拱桥计算的实体梁单元法。
A thorough study is exerted in this paper on the general method of transformation from plane elasticity displacement element , which is characterized by its simple formulation and sound reliability , to plate bending element 本文充分研究了将平面弹性位移法单元转化为板弯曲单元的一般方法。平面弹性单变量位移元具有列式简单、可靠性好的优点。
According to maxwell principle , the mechanical characteristics could be analyzed with the svd methods for balanced matrix . besides , considering initial strain and stress , the paper established the nonlinear finite elment equilibrium equation based on t . l formulation L格式的非线性有限元位移法平衡方程,并采用mn - r法编制相应的程序进行张拉整体结构的非线性力学分析。
In this paper , based on analyzing the matrix displacement method and the transfer matrix method , the author combined them to form a new method , which called matrix mixed method , and then used this method to calculate the internal force and displacement of skew bridges 本文在分析了矩阵位移法和传递矩阵法的理论基础上,将二者组合而成矩阵混合法,并应用于斜交格栅结构的内力与变形分析计算中。
Initial ground stresses of rock slope were simulated , using boundary displacement method ( bdm ) and stress function method ( sfm ) respectively , and combining with finite element method ( fem ) . the practical results indicate both methods can simulate the initial stress field with good effect 采用边界位移法和应力函数法,并结合有限元程序对岩质高边坡进行了初始地应力场的模拟与分析,实践结果表明这两种方法均能取得较好的效果。
When analyzing skew support continuous curved box girder bridge , curved grid girder analyzing method considering warping effect is applied . matrix displacement method is applied in analyzing skew support continuous curved thin - walled box girder bridge with restrained bearing . in order to convert original rigidity equations to structural rigidi ty equations that can be solved , bearing nodal displacement matrix can be introduced , then unknown quantities at the edge of beams can be consistent with the restrained directions of skew bearings , unit rigidity matrix and unit nodal forces can be gained . structural rigidity matrix can be composed according to matrix displacement method , so nodal displacements and inner forces on the end of the rod that are unknown can be gained calculating equations of inner forces on any cross - section can be solved 分析斜支承连续曲线箱梁桥时,采用考虑翘曲作用的曲线格子梁分析方法,应用矩阵位移法对具有约束支承形式的斜支承连续曲线薄壁箱梁桥进行分析,考虑到支座的约束条件并不与梁端弯曲角位移和扭转角位移的方向一致,引入支座节点坐标矩阵,使得梁端的位移未知量与斜支座约束方向一致,来计算单元刚度矩阵和单元节点力,然后按照矩阵位移法组集总刚并建立结构刚度方程,根据结构刚度方程即可求解未知的节点位移及杆端力,推导出任意截面处的内力计算公式。
This paper introduces the developing tendency of the space structure and the application of the pretensioned space lattice structure , summarize the analysis method and relation between lattice structure and pretensioned space lattice structure . dissertate the space pole - truss displacement method , tendon working principle , set forth the method of optimal design and whole process design . includes the use stage design and construction stage design of pretensioned space lattice structure 本文首先介绍了空间结构的发展趋势及拉索预应力空间网格结构的应用情况,概述了网格结构与拉索预应力空间网格结构的分析方法及其相互关系,论述了空间杆系桁架位移法,拉索作用机理,阐述了拉索预应力空间网格结构的优化设计及全过程设计的设计方法,包括拉索预应力空间网格结构使用阶段的设计和施工阶段的设计。