典型工况下轿运车架有限元仿真及频响特性分析
Finite Element Simulation and Frequency Response Analysis of Carriage Frame under Typical Working Conditions

中置轴轿运车在轿车运输领域应用十分广阔，相较于普通轿运车，它有着运输安全性高、装卸车辆便捷等特点。作为中置轴轿运车的核心承载部件，轿运车架的安全性和可靠性是保障轿车安全运输的重要因素。为研究中置轴轿运车车架的动态静力和振动特性，首先，本文通过三维软件Solidworks建立了简化的中置轴轿运车架模型。然后，基于有限元方法，将其导入仿真软件Ansys Workbench中进行三种典型工况下的动态静力分析，对各种工况下轿运车架的应力分布和变形进行了详细讨论。最后，对轿运车架进行了预应力模态分析，分析了轿运车架的固有频率和振型，避免了与发动机频率重合发生共振，为进一步研究中置轴轿运车架的可靠性提供了参考。
The car with middle axle is widely used in the field of car transportation. Compared with the ordi-nary car, it has the characteristics of high transportation safety and convenient loading and un-loading of vehicles. As the core bearing part of mid-axle car, the safety and reliability of car frame is an important factor to ensure the safety of car transportation. In order to study the dynamic static and vibration characteristics of mid-axle sedan frame, firstly, a simplified model of mid-axle sedan frame is established by using Solidworks, a three-dimensional software. Then, based on the finite element method, it was imported into the simulation software Ansys Workbench for dynamic and static analysis under three typical working conditions, and the stress distribution and deformation of car frame under various working conditions were discussed in detail. Finally, the prestressed modal analysis is carried out on the carriage frame, and the natural frequency and vibration mode of the carriage frame are analyzed to avoid resonance with engine frequency coincidence, which provides a reference for further research on the reliability of the carriage frame with mid-axle.