An analytical model for the natural frequencies of a railway wheel and comparison with experimental results

作者：Sakamoto H^*

来源：Proceedings of the Institution of Mechanical Engineers - Part F: Journal of Rail and Rapid Transit , 2007, 221(3): 391-398.

DOI：10.1243/09544097JRRT104

• railway wheel
• screech sound
• natural frequency
• elasticity theory
• vibration node

Vibration generated at the contact surface between rails and wheels have been considered the main cause of noise from railway vehicles. Such noises are classified into three types: rolling, impact, and squeal noises. The mechanisms by which each noise is generated have been well researched.
The current study treats mainly lateral and vertical vibrations of railway wheels, and focuses on squeal noises that originate on curves. The current study includes calculations of the natural frequencies of wheels based on elasticity theory, laboratory tests to measure the, natural frequencies of wheels, and field tests to measure the sounds and vibrations of railway wheels. Many researchers have calculated natural frequencies by the finite-element method, which can give the exact quantitative number when information such as the model and boundary conditions is correct. The author obtained frequencies by elasticity theory, because a qualitative understanding is thought necessary, regardless of the boundary condition.
The results of the current study showed that the origin of the squeal noise on a curved track comes from the lateral vibration of the wheel; but it is shown that the dominant component of rolling noise on a straight track at around 800 Hz is not related to wheel vibration.

• 出版日期2007-9