CW-200K转向架构架疲劳强度及模态分析研究

Fatigue Strength and Modal Analysis of CW-200K Bogie Frame

根据CW-200K转向架构架的结构和承载特点,运用Solidworks建立构架的实体模型,并将模型导入AN-SYS中进行有限元分析,依据分析结果并参照标准JIS E4207—2004和焊接材料的Goodman疲劳极限图对构架进行疲劳强度评估.此外,还对构架进行模态分析,分析构架在某一频域内的振动模态,从而评价构架的动态性能是否满足设计要求.分析结果表明:各关键点的等效应力均小于许用值,构架满足疲劳强度的要求;构架的最低自振频率为33.944 Hz,能够有效地避开激振频率.这为优化构架结构提供相关的参数依据.

Based on the structure and load characteristics of CW-200K bogie frame, the solid model is built by using Solidworks according to the structural parameters of CW-200K bogie frame. According to the analytical results,the fatigue strength of the frame is checked referring to JIS E 4207 and Goodman sketch for welding materials. In addition, the modal analysis of the frame is made and the vibrational modal of frame in given frequency-domain is predetermined to evaluate the dynamical behavior of the frame in order to meet the dynamical design requirements. Analyzed with the simulation results, the test stress values are lower than standard values and the frame meets the requirement of fatigue strength. The lower self-vibration frequency of the frame is 33. 944Hz which can avoid excited frequency of the frame. The optimization in structural behavior of the frame is provided with theoretical parameters.