Browse Publications Technical Papers 2002-01-3347
2002-12-02

Inertial and Modal Properties of Racing Motorcycles 2002-01-3347

The dynamic behavior of a racing motorcycle depends on the inertial characteristics of the vehicle, which is considered as a rigid body, and on the power-train characteristics. In particular, the center of mass position and moments of inertia around the roll and yaw axes give information about handling characteristics. The modes of vibration of the vehicle in motion (capsize, weave and wobble), which determine motorcycle stability, depend on rigid body properties and tire characteristics, but can also be influenced by mass and flexibility distributions. The inertial properties of super sport motorcycles were identified using a special inertia tester machine that made it possible to measure the inertia moments around different axes without moving the vehicle. The results regarding the moments of inertia around the roll, pitch and yaw axes and roll/yaw products of inertia are showed here. The structural modes of vibration, natural frequencies and damping ratios of the motorcycle were identified, because they highlight the influence of mass and flexibility distributions on dynamic behavior. The modal analysis was carried out using the impulsive technique on the whole vehicle. The structural modes identified in static conditions are here compared with the motorcycle's modes of vibration that take place in motion. Results are then discussed in terms of stability and handling.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Members save up to 18% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:
TECHNICAL PAPER

Experimental Investigation of the Transient Behavior of Motorcycles

790266

View Details

TECHNICAL PAPER

A Simplified Motorcycle Model

2007-01-0829

View Details

TECHNICAL PAPER

A Review of Motorcycle Steering Behavior and Straight Line Stability Characteristics

780303

View Details

X