摘要
以高速动车组车体端墙为研究对象,以端墙墙板厚度为设计变量,基于ANSYS-PDS模块为分析平台,研究车体端墙二阶振动频率对设计变量的灵敏度。基于蒙特卡罗法进行概率分析,得出了各个设计变量对车体端墙二阶频率影响的灵敏度图、车体端墙二阶振动频率与设计变量的关系曲线。在满足车体轻量化要求的前提下,根据灵敏度图和关系曲线图分析结果对车体端墙进行结构优化,提高了端墙二阶振频率,并成功避开了车体的自振频率。
Taking the body end wall of high speed EMU as research object, and the wallboards’ thickness of the end wall as the design variables, we study the sensitivity of the second-order vibration frequency to design variables based on the ANSYS-PDS module. Probability analysis based on Monte Carlo method allows us to obtain the sensitivity diagram of each design variable to the second-order vibration frequency of the body end wall and the relationship curve between the second-order vibration frequency and the design variables, according to the analysis results of the sensitivity diagram and the relationship curve. Under the premise of meeting the lightweight requirements, we optimize the structure of the body wall to increase the second-order vibration frequency of the end wall and avoid the natural vibration frequency.
出处
《农业装备与车辆工程》
2017年第12期29-32,共4页
Agricultural Equipment & Vehicle Engineering
