Coupling Dynamics Hongta HT01001X Solid Flow Exhaust System

Along with the human constant pursuit of Vehicle performance, and constant improving of automotive engine Power, about the problem of vehicle exhaust, vehicle noise and vehicle vibration is growing concern. Automotive exhaust system play a very important role in waste air treatment of vehicle, noise control and comfort of vehicle. Because automotive exhaust system works in the complex environment, resonance of exhaust system has impact on the function and actual life of exhaust exhaust system such as engine excitation, engine air excitation and road excitation of influence, it is important guiding significance to analysis vibration characteristics of automotive exhaust system.UG software is used in this paper to establish the three-dimensional models of automotive exhaust system. At first, because its structure is very complex, rationally simplified simulation model, and it is imported into ANSYS Workbench to analyze problem. Firstly, this paper analyze automotive exhaust system of vibration modal analysis under condition of no load and restricted status, and natural frequency and the amplitude of every modal is obtained. Secondly, ANSYS CFX is employed to analyze aerodynamic characteristic of automobile exhaust system, and distribution diagram of pressure, speed and temperature is obtained. At last, this paper takes ANSYS Workbench as a platform, and the analysis result of ANSYS CFX is exerted on the automobile exhaust system in ANSYS Workbench by the load form, completing the fluid-structure interaction analysis, and analyzing gas have impact on vibration characteristics, this is one of main the purpose of this paper.Research results show that:the impact of gas on vibration characteristics is obvious in low frequency range. Its amplitude of every modal mainly comprises longitudinal vibration, vertical vibration and torsional bending by fluid-structure interaction analysis. The biggest deformation is main in the pipe bending of exhaust duct, connecting region between exhaust pipe and muffler, connecting region between tail pipe and muffler. At the same time, we learn it is convenient to analyze the problem of fluid-structure interaction ANSYS Workbench software.