By the truncated expansion and Jacobi elliptic function expansion methods, we have found some exact solitary wave, rational formal, triangle function and elliptic periodic solutions of the general variable coefficient KdV equation with external force term. 运用截断展开法和Jacobi椭圆函数展开法,求得了含外力项的广义变系数KdV方程的精确孤立波解、有理形式函数解、三角函数解和椭圆周期解。
Based on experiment, the shear mechanism of reinforced concrete beam without web reinforcement under triangle load was analyzed. The shear capacity is decided by the magnitude of shear force above the end of the inclined crack, and the suggestive calculation method is presented. 在试验基础上,分析了三角形分布荷载下钢筋混凝土无腹筋梁抗剪机理,指出斜截面受剪承载力由斜裂缝末端剪力决定,并提出了建议计算方法。
The mixed reticulated shell is a new type of spatial structure. This paper adopts the finite element method with a composite element of a 3-D beam element and a triangle plane shell element to analyze the characteristic of static force in the mixed oblate shell. 混合型网壳是一种新型空间结构形式,采用板壳元、空间梁单元、杆单元的组合结构有限元法对这种结构的受力特性作了探讨分析。
By using finite element method and taking bolt material elastic-plasticity into consideration, the distribution laws of inner force and stresses in and deformation of a general triangle screwed bolt under the action of axial force were numerically calculated and analyzed. 采用有限元数值模拟方法,考虑螺栓材料的弹塑性性质,计算分析普通三角形螺纹螺栓&螺母副在轴向力作用下的内力、应力和变形规律。
Firstly, roll-pressing course of spirally grooved tube is simulated by kinds of shape tools ( sphere and triangle with arc) so as to obtain the distribution of stress, strain, the states of metal flow, the deformation of corrugation and the value of roll-pressing force. 首先,分别采用了球形和带过渡圆弧的三角形滚压辊辊型,模拟了螺旋槽管的滚压过程,从而得到了应力、应变分布情况;金属流动情况;
For the cantilever triangle hanging basket, the structural analysis of the mathematical model according to the force characteristics and node structure by its form, the space bar element model and the spatial beam element model are mainly studied. 对于悬臂浇筑三角挂篮来讲,结构分析的数学模型根据它的受力特点和节点构造形式,主要研究其空间杆单元模型和空间梁单元模型。