基于有限元的摆杆-摆锤系统模态分析  

作　　者：吴燕瑞 刘婷 程国飞[1] 魏文强[1] 苏开华[1] 

机构地区：[1]中山火炬职业技术学院,广东中山528437

出　　处：《科技创新与应用》2023年第7期59-62,共4页Technology Innovation and Application

基　　金：广东省普通高校青年创新人才类项目(2019GkQNCX133)。

摘　　要：仪器化冲击试验已经成为冲击试验的新方向,对试验得到的动态信号进行分析,提取与金属断裂韧性有关的特征值成为今后的一个重要研究方向。该文对夏比冲击试验机的摆杆-摆锤系统建立三维模型,采用有限元法对系统进行模态分析,得出系统的前15阶模态的振型及频率。分析结果可为预测系统在冲击激励下的频谱响应提供参考。Instrumented impact test has become a new direction of impact test.Analyzing the dynamic signals obtained from the test and extracting the eigenvalues related to metal fracture toughness has become an important research direction in the future.In this paper,a three-dimensional model of the pendulum bar-pendulum system of the Charpy impact testing machine is established,the modal analysis of the system is carried out by the finite element method,and the mode shapes and frequencies of the first fifteen modes of the system are obtained.The analysis results can provide a reference for predicting the spectral response of the system under shock excitation.

关 键 词：冲击试验 有限元模态 频谱分析 振动 摆杆-摆锤系统 

分 类 号：TG115.28[金属学及工艺—物理冶金]