地铁B型车车体静强度及模态计算

应用有限元方法及ANSYS软件建立了地铁车辆车体结构有限元分析模型,根据地铁车辆受力分析和危险程度,选择拖车(头车)作为计算、分析对象,确定了有限元模型的计算载荷、常见计算工况和评定标准,计算了车体在整备状态下的车体静强度,分析了整备状态和超常状态下的固有频率和振型。结果表明,地铁车体静强度在常见计算工况下皆能满足相关标准的要求,车体一阶扭转和一阶垂向弯曲自振频率偏低,一般要求车体在整备状态下的自振一阶垂弯频率应大于10 Hz,以避开转向架的点头频率;减小结构质量的同时增大结构刚度,在满足车体强度要求下,可以实现以降低次要的振型频率来提高主要的振型频率的目的,并可进一步地减轻车体质量。

Static strength and mode analysis of B-type subway body

A particular finite element analysis model of subway vehicle car body structure was set up with finite element method and ANSYS software,tow truck was taken as analytical object according to subway vehicle load and dangerous grade,the FEM calculational loads,constant operating conditions and assessing standards of the model were confirmed,subway bodywork static strength under all-setup and its inherent frequencies and vibration model were reckoned.The result indicates that the static strength of subway car body structure satisfies the relative design requirements in constant operating conditions,at the same time,its first step torsion and vertical bend vibration frequencies are smaller than 10 Hz,which is overall bogie pitching frequency.It is pointed that reducing its secondary vibration frequency can improve its primary vibration frequency and alleviate body mass by improving stiffness while decreasing structure mass.4 tabs,16 figs,7 refs.