Screw-damper cover on a motorcycle primary-chain cover
A simple low-cost vibration damper (a loose extension nut) was designed to dampen out the cover’s breathing mode. Historically, a large cover was the dominant mechanical noise radiator in the powertrain. This vibration damper has proven effective in reducing the cover’s
breathing mode of vibration, thus reducing the noise radiated by the cover. In a noise pass-by test, the damper showed a measurable noise reduction. An FEM analysis was used to identify the anti-node at the cover’s breathing mode. A proposed analytical model (Lanchester damper) was used
to understand the damping mechanisms.
Document Type: Research Article
Publication date: 01 November 2008
NCEJ is a peer reviewed Technical journal published every two months. The papers published in NCEJ cover general topics related to noise control engineering, ranging from fundamental research to applied case studies and histories.
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