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The second-order effect is the interaction between the vertical load and the deformation in a vertically forced element. In order to deduce a more brief but practical method, which has considered the second-order effect in a sway frame, some factors which affect the second-order deformation in a sway frame should be generalized based on a more accurate method. Nonlinear finite element is adopted in this paper, and according to this theory, a program, which can calculate the inner force and the deformation of the sway frame considering the second-order effects is coded. 相似文献
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Combining lubrication theory and CFD technology, a finite element model is established to simulate the rain-wind-induced vibration (RWIV). Based on Spalart-Allmaras(S-A)turbulence type, COMSOL software is adopted to calculate the wind pressure coefficient and wind friction coefficient that vary with the location and time. To verify the veracity and rationality of this method, the formation and evolution of rivulets at different wind speeds are studied and compared with the existing experimental results. Furthermore, the time, location, height and width of the initial formation of rivulets are analyzed at different wind speeds, cable inclination angles and wind yaw angles. The results show that the three influencing factors mentioned above have great effect on the formation of rivulet, and the influencing tendency, range and degree are different from each other. 相似文献
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吉林省通化女孩王一涵,今年24岁,刚大学毕业。和别的毕业生不一样的是,她在找工作的同时,还在研究一项新的技术,此前她已经拥有3项国家专利。呵谁能想到就是这个女孩,高中时物理从来都没有及格过。 相似文献
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