机动转弯条件下转子有限元建模方法

摘要

为了使机动转弯条件下转子动力学模型更加精确,考虑梁单元的转动惯量和剪切变形,对有限元Timoshenko梁模型的相关理论进行推导;考虑到机动转弯载荷对转子响应的影响,对机动转弯条件下梁单元、刚性圆盘单元的机动载荷向量和重力载荷向量进行推导.利用以上推导结果建立了1套机动转弯条件下转子有限元的建模方法,利用该方法建立的模型进行机动转弯过程中含弹性支承双盘转子的振动响应计算,结果表明:机动转弯产生的附加载荷会使转子模型产生一定的静位移.%In order to make dynamic model of rotor more accurate under maneuvering turning condition,the related theory of beam element was deduced with the considering of moment of inertia and shear deformation.Considering the effect of load on the rotor response under maneuvering turning condition,the maneuvering load vector and gravity vector of rigid disk element and beam element were deduced. Based on the above results,a set of rotor finite element modeling method was established.The model was established by the method,which was used to calculate the vibration response of the double disk rotor including elastic support during maneuvering turning.The results show that the additional load of maneuvering turning could produce a static displacement to the rotor model.