摘要
针对某发动机连杆部分变形与整体变形的问题,通过UG NX12.0软件对发动机连杆结构建立逆向三维实体模型,基于有限元分析方法,利用HyperMesh软件对发动机连杆结构模型进行有限元仿真研究,以该模型为基础完成了连杆在实际工况下的应力和模态的仿真研究。试验结果表明:将实际载荷施加到连杆,得到实际工况下最大应力,通过LMS信号采集仪得到的测量点处的应变数值为6.1×10^(-6),相应的应力为1.28 MPa,仿真得到该部件的测量点应力为1.26 MPa,误差为1.5%,仿真与试验结果基本一致,进一步证明了有限元仿真的可靠性。完成上述工作后,对发动机连杆进行模态仿真,得到连杆自由模态下的固有频率和振型,为发动机连杆进一步优化和应力、模态仿真提供可靠的理论和应用依据。
Aiming at the problem of partial deformation and overall deformation of the connecting rod of an engine,the inverse three-dimensional solid model of the connecting rod structure of the engine was established by UG NX12.0 software.Based on the finite element analysis method,the finite element simulation of the connecting rod structure model of the engine was carried out by HyperMesh software.Based on this model,the stress and modal simulation of the connecting rod under the actual working condition were completed.The test results showed that,the actual load was applied to the connecting rod to obtain the maximum stress under the actual working condition.The strain value at the measuring point was 6.1×10^(-6) and the corresponding stress was 1.28 MPa obtained by the LMS signal acquisition instrument.The stress at the measuring point of the component was 1.26 MPa obtained by simulation,with an error of 1.5%.The reliability of finite element simulation was further proved.After the above work was completed,the modal simulation of the engine connecting rod was carried out,and the natural frequency and mode shape of the connecting rod under the free mode were obtained,which provided a reliable theoretical and application basis for the further optimization of the engine connecting rod and the stress and mode simulation.
作者
周壮
周长峰
董培阳
鲁大坤
ZHOU Zhuang;ZHOU Changfeng;DONG Peiyang;LU Dakun(School of Automotive Engineering,Shandong Jiaotong University,Jinan 250357,Shandong,China)
出处
《农业装备与车辆工程》
2023年第11期72-75,共4页
Agricultural Equipment & Vehicle Engineering
关键词
发动机连杆
有限元法
应力仿真
应力试验
模态仿真
engine connecting rod
finite element method
stress simulation
stress test
modal simulation
