Performance Analysis And Experimental Study Of Crankshaft Torsional Vibration Damper

The engine is one of the main sources of automobile vibration,and the main form of the engine vibration is the torsional vibration generated by the crankshaft.Excessive torsional vibration of the crankshaft system will affect the life of the engine and transmission,otherwise the vibration can affect the comfort of passengers and the handling performance of the car.Serious torsional vibration of the crankshaft will also affect the health and safety of the driver and passenger.This paper focus on crankshaft torsional vibration damper.This paper establish a matching dynamic model of the crankshaft system,and discuss the key parameters in the model,and the natural frequency of the crankshaft system was determined by the theoretical calculations.And using AVL-excite design analyzed the vibration characteristics of the crankshaft system.The paper discuss the matching method of crankshaft torsional vibration damper according to the analysis results,and propose the selection method of crankshaft torsional vibration damper parameters,and the crankshaft system models before and after matching are analyzed to determine the reliability of the matching method.This paper analyzes the dynamic performance of crankshaft torsional vibration damper,establishes the Kelvin model of crankshaft DVT,introduces the calculation method of model parameters,and uses the model to calculate and analyze the natural frequency of crankshaft torsional vibration damper.A rubber hyperelastic constitutive model of crankshaft torsional vibration damper was established,and a test fitting method for the parameters of the hyperelastic constitutive model was determined.Using ABAQUS finite element analysis the crankshaft DVT.The test results of different modal test methods for crankshaft torsional vibration dampers are compared,and the results show that the natural frequency of crankshaft torsional vibration dampers can be more accurately obtained by hammering method.The experimental results are compared with the simulation and calculation results.The errors are relatively small,which proves the correctness of the simulation and theoretical models.The fatigue test method of crankshaft torsional vibration damper is also introduced.The temperature characteristics of the crankshaft torsional vibration damper are analyzed.By studying the influence of temperature on the characteristics of the rubber material,the trend of the natural frequency of the crankshaft torsional vibration damper with temperature is determined.And through experimental verification,the change curve of natural frequency of crankshaft torsional vibration damper with temperature was obtained.Provide guidance for production.This article is guided by actual production needs,and the research results have certain guiding significance for the development and production of crankshaft torsional shock absorbers.