Type of Submission

Poster

Keywords

vibrations, damping, automotive, hydraulic, bushing, flow, experiment, dynamic, isolation, compliance

Proposal

Hydraulic bushings are soft mechanical joint components which provide excellent vibration damping for a low-frequency band. These properties emerge from a tuned dynamic interaction between several features which either store or dissipate energy when the joint is flexed. In order to design and predict the dynamic properties of a hydraulic bushing, an understanding of the underlying physics governing each feature is needed. Typical feature models are based on many assumptions which are unlikely to be physically realistic under in situ loadings, so this study seeks to investigate the dynamic properties of hydraulic bushings’ flow passages under unsteady flow conditions.

In this project, a new measurement method is developed to subject flow passages to dynamic flow conditions, such as sinusoidal or transient flows, and measure the resulting characteristics. The apparatus is configured to test both controlled flow restrictions and isolated passages from production bushings. Analysis of the experimental results should facilitate improved modeling of hydraulic mounts and bushings. Some sample results are given, and future work is proposed.

Creative Commons License

Creative Commons License
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.

Publication Date

2023

Share

COinS
 

Measurement Method for Dynamic Flow Characteristics of Hydraulic Bushing Features

Hydraulic bushings are soft mechanical joint components which provide excellent vibration damping for a low-frequency band. These properties emerge from a tuned dynamic interaction between several features which either store or dissipate energy when the joint is flexed. In order to design and predict the dynamic properties of a hydraulic bushing, an understanding of the underlying physics governing each feature is needed. Typical feature models are based on many assumptions which are unlikely to be physically realistic under in situ loadings, so this study seeks to investigate the dynamic properties of hydraulic bushings’ flow passages under unsteady flow conditions.

In this project, a new measurement method is developed to subject flow passages to dynamic flow conditions, such as sinusoidal or transient flows, and measure the resulting characteristics. The apparatus is configured to test both controlled flow restrictions and isolated passages from production bushings. Analysis of the experimental results should facilitate improved modeling of hydraulic mounts and bushings. Some sample results are given, and future work is proposed.

 

To view the content in your browser, please download Adobe Reader or, alternately,
you may Download the file to your hard drive.

NOTE: The latest versions of Adobe Reader do not support viewing PDF files within Firefox on Mac OS and if you are using a modern (Intel) Mac, there is no official plugin for viewing PDF files within the browser window.