半挂牵引车车架结构的动态分析及改进

摘要

In order to reduce the damage caused by vibration of ZL4180 frame,the finite element models for frame, rivet, suspension and tire have been established. Both harmonic response and transient response were analyzed for ZL4180 frame by the ANSYS software, which result shows that the repeated fluctuating load on the beam bracket of the engine and the front of girder frame are great.The results accorded with those of the frame where abnormal crack occurs, which verified the feasibility to build and analyze the modeLThus the improvement for the frame structure is done according to the actual load condition and the results of the analysis.Compared with the original structure, the amplitude and stress of the resonant frequency from frame have been obviously decreased and the inherent frequency of the frame unsprung mass has been avoided.lt is apparent that the frame is improved effectively.%为降低ZL4180型半挂牵引车车架由振动而导致车架的损坏,建立了车架的主体、铆钉、悬架和轮胎的有限元模型.利用ANSYS软件对ZL4180型半挂牵引车车架进行谐响应和瞬态响应分析.分析结果表明,发动机托架的横梁上和车架纵梁的前端交变动载荷较大,这与车架产生裂纹的结果相吻合,证明了模型建立和分析的可行性.根据车架的实际承载情况和原结构的分析结果对车架结构进行了改进,与原结构相比改进后的车架在共振频率处的振幅和应力都有显著下降且避开了车架非簧载质量的固有频率,显然对车架的改进是有效的.