平面滑动闸门在不同结构体系下的静力计算分析方法

Static Calculation Analysis Method of Plane Sliding Gate under Different Structure Systems

传统的闸门设计基于平面结构体系,通过简化受力模型对各个构件进行计算,并未考虑构件间的变形协调关系;实际的闸门为空间结构体系,各个几何构件之间相互协调,受力更加复杂。通过对平面体系和空间体系计算原理的分析论述,建立了一种平面滑动闸门在不同结构体系下的静力计算分析模型,通过典型工程实例,基于平面体系计算方法和空间体系计算方法对闸门强度、刚度进行校核计算。结果显示,两种结构体系下,主梁前翼缘正应力和面板折算应力误差较大。最后通过假设,并利用对假设进行验证表明:平面体系计算中,由于主梁的应力计算没有考虑水平次梁的参与,导致主梁前翼缘正应力误差较大,进而引起面板折算应力误差较大。同时,对于其它构件误差也进行了误差分析,提出了一定的要求,为设计人员设计类似闸门和改进平面计算方法提供了参考。

Traditional gate design is based on plane structure system,and the calculation of each component is carried out by simplifying the mechanical model,without taking the deformation coordination relationship among the components into consideration.While the gate in actual use is a spatial structure system,of which the components coordinate with each other,and the stress is far more complex.On the basis of the analysis of the calculation principles of both plane system and spatial system,a static calculation and analysis model of plane sliding gate under different structural systems is established.And through typical engineering cases,the check calculation of the gate strength and stiffness is carried out based on the calculation method of plane system and spatial system.The result shows that the error between the normal stress of the main beam front flange and the equivalent stress of the panel under the two structure systems.Finally,the errors is verified by hypothesis.It turns out that in the calculation of plane system,the normal stress error of main beam front flange is large because the secondary horizontal beams is not taken into consideration in the stress calculation of main beam,which leads to a large equivalent stress error of the panel.At the same time,the error analysis of other components is also carried out,and certain requirements are put forward,which provides reference for the design of similar gates and the improvement of the plane calculation method.