A Research On The Vibration Of A Two Wheeled Motorcycle Steering Handle

Nowadays, the pursuit ofride comfort becomesan urgentdemand of the terminalmarketfor customers. The vibration comfort of motorcyclehas become an importantindex to evaluate theperformance of amotorcycle. However, motorcycle steering handleis a major componentof the motorcycleand itsstructure affects themotorcycle comfortdirectly and its vibration problem is the one of the most important factor that influences the ride comfort. The analysis ofstructural strength andvibration characteristics ofthe steering handlegives an effective way to improve the ride comfort.At the same time,the organic combination using of CAD\CAE and experimentalmethodscan improve the quality ofmotorcycle design,reduce the development costs,shorten the development time and raise the success rate of development, as a result, it will promotes product’s developmentlevel of the motorcycle manufacturing enterprise.This paper mainly takesa type of motorcycleas an example to conductthe Motorcycle Steering Handle’sstructure by dynamiccharacteristics testing.The main research contents are as bellow:Firstly, I established 3D model of themotorcycle steering handleandbodyparts by use of UG.Then the Motorcycle Steering Handle’s finite elementmodel is established by using of MSC.PATRAN, constraint modal finite element analysis was conducted in the meantime.I obtained the inherent frequency and vibration model, finding the weak parts ofthe ride comfortis position of motorcycle steering handle. By using a structure improvement method to adjust the steering handles inherent frequency. It avoided the occurrence ofcoincide with theexcitation frequencyleads to the resonancephenomenon.Secondly, three kinds of structural improvements of motorcycle steering handle are proposed(such as increasing the structural stiffness, improving the quality or the combination of the two methods), using comparison analysisevaluationmodal to analyze the three improvement schemesunder the same conditions, then come to the result assessment, considered thedesign cost, it shows that theincrease inthe steering handle’s weight hasmore obvious effecttoreducethevibration ofthe handle.Then using transient response analysis to analyze the scheme of increasing the weight of steering handle, when input excitation frequency 100Hz(The corresponding engine speed at 6000r/min), the X, Z direction acceleration speed decreased significantly, proving that adding the balance weight can obviously improve the vibration effect.Finally, I tested the improved steering handle(addthebalance weight). The test results verified the feasibility and correctness of thetheoretical analysis results.