动力系统悬置传递特性分析与应用

车辆行驶时,各结构运动件的振动相互影响,合理判断结构彼此影响的关系,是分析悬置隔振特性的前提。分析和总结以加速度为激励计算的传递特性规律,推导车辆实际运行时悬置传递特性,结合试验设计悬置件隔振特性计算流程,以独立动力系统激励试验、独立路面激励试验、实际稳态车速试验获得振源间的干涉成分、共频成分和相应比例;最后,通过实车试验测试与数据处理,获得动力系统悬置时域隔振特性。提出的方法能够有效地提高悬置隔振率和传递特性的评价精度,具有一定工程应用价值。

Analysis and Application of Transfer Characteristics ofPower System Mounts

The vibration from different moving structure in car traveling is interactional, judging interactional relations among structures reasonably is premise to analyze the suspension system characteristics. In paper, the transfer characteristics law with the acceleration being exciting are analyzed and summarized, the mount transfer characteristic of the car in driving is derived, and combining with experiment, calculation flow of the mount isolation characteristic is designed, experiments with independent power system excitation test, independent road excitation test, driving test in steady speed are proposed to obtain interference components, common frequency components and the corresponding proportion between vibration source; and finally, by the actual driving testing and data processing, the time-domain isolation characteristics of the power system mounts are obtained. The proposed method can effectively improve the evaluation precision of the mount system and transfer characteristics it is a certain engineering application value.