带隔板悬臂梁扭转特性分析
发布时间：2018-11-08 13:47
【摘要】：为研究带隔板悬臂梁隔板对箱梁受力及变形的影响机理,将带隔板箱梁视为具有内部赘余联系的高次超静定结构,提出基于变形协调原理的畸变柔度法,并结合精细时程积分迭代算法精确求解内部赘余力。基于闭口截面初参数法和叠加原理,得到m个偏心载荷作用下具有n块隔板悬臂梁自由端扭率和转角表达式。以纯扭矩作用下单隔板悬臂梁为例,对比有限元法结果充分验证畸变柔度法精确性;综合研究隔板位置对带隔板悬臂梁自由端转角和翘曲位移的影响。结果表明:当隔板由固定端移动至自由端时,自由端转角先减小后小幅增大,节点翘曲位移大幅减小。
[Abstract]:In order to study the mechanism of the influence of the diaphragm on the stress and deformation of the box girder, the box girder with the diaphragm is regarded as a high-order statically indeterminate structure with internal redundant connections, and a distortion compliance method based on the principle of deformation coordination is proposed. And the precise time integration iterative algorithm is used to solve the problem of Yu Li. Based on the method of initial parameters of closed section and the principle of superposition, the expressions of torsion ratio and angle of free end of cantilever beam with n spacer plates under m eccentricity loads are obtained. Taking the order plate cantilever beam with pure torque as an example, the accuracy of the distortion flexibility method is fully verified by comparing the results of finite element method, and the influence of the partition position on the free end rotation angle and warpage displacement of the cantilever beam with diaphragm is studied synthetically. The results show that when the diaphragm moves from the fixed end to the free end, the angle of the free end first decreases and then increases slightly, and the node warping displacement decreases significantly.
【作者单位】： 西南交通大学机械工程学院;
【基金】：国家自然科学基金(51175442)
【分类号】：TU31
，
本文编号：2318675
[Abstract]:In order to study the mechanism of the influence of the diaphragm on the stress and deformation of the box girder, the box girder with the diaphragm is regarded as a high-order statically indeterminate structure with internal redundant connections, and a distortion compliance method based on the principle of deformation coordination is proposed. And the precise time integration iterative algorithm is used to solve the problem of Yu Li. Based on the method of initial parameters of closed section and the principle of superposition, the expressions of torsion ratio and angle of free end of cantilever beam with n spacer plates under m eccentricity loads are obtained. Taking the order plate cantilever beam with pure torque as an example, the accuracy of the distortion flexibility method is fully verified by comparing the results of finite element method, and the influence of the partition position on the free end rotation angle and warpage displacement of the cantilever beam with diaphragm is studied synthetically. The results show that when the diaphragm moves from the fixed end to the free end, the angle of the free end first decreases and then increases slightly, and the node warping displacement decreases significantly.
【作者单位】： 西南交通大学机械工程学院;
【基金】：国家自然科学基金(51175442)
【分类号】：TU31
，
本文编号：2318675
本文链接：https://www.wllwen.com/guanlilunwen/chengjian/2318675.html
