Study on durability and reliability of strut type suspension noise based on experimental methods

Abstract

When cars are released from the factory, strut noises are very small and therefore it is difficult to perceive them. As the use time and travel distance increase, however, strut noises get larger so as to cause users much uneasiness. The noises generated at the field include engine noises and flow noises and therefore it is difficult to clearly discern the noises generated from struts. This study developed a test method which can reproduce field strut noises in the lab. Using the newly developed noise evaluation test, this study analyzed the effects that insulator performance degradation and failure can have on car noises. The study also confirmed that the insulator durability test by the simple back-and-forth motion cannot completely reflect the state of the parts failure in the field. Based on this, the study also confirmed that field noises can be reproduced through a durability test that considers heat aging.

Kinematics & Compliance Validation of a Vehicle Suspension and Steering Kinematics Optimization Using Neural Networks

“…In the development phase of the vehicle, by creating a target for each K&C characteristic, design variables such as the position of the suspension hardpoints, and the stiffness of the suspension bushings are tried to be determined optimally [4]. The McPherson suspension system, together with the anti-roll bar and the steering sub-components, creates a complex design environment, and previously they were subjected to an optimization individually [5]. Since these subsystems are kinematically related, the introduction of MBD enabled the analysis of the wheel motion precisely and helped to evaluate and optimize the suspension characteristics [6].…”