Braking Disc Aperiodic Notch Profile Resonance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Disc brakes, particularly in motorcycles, suffer from noise issues due to the rubbing of the disc against the brake pads, which is exacerbated by mechanical resonance caused by periodic stress patterns, leading to increased noise and vibration.
Innovation Solution
A braking disc with a plurality of notches along its edge, where the angular distance between notches varies, creating an aperiodic pattern that disrupts mechanical resonance and reduces noise by diversifying the frequency of mechanical stress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the external profile of the disc is made discontinuous with regularly spaced concavities, then the rubbing noise is reduced, but mechanical resonance is triggered at specific frequencies
Solution Approach 1:
The patent applies asymmetry by making the angular distances between successive notches non-uniform and aperiodic around the braking track. This asymmetric distribution disrupts the periodic stress patterns that cause mechanical resonance while still providing noise reduction benefits through the discontinuous profile.
Solution Approach 2:
The patent deliberately avoids periodic action by ensuring the notches are not evenly spaced. Instead of regular periodic patterns that trigger resonance at specific frequencies, the aperiodic arrangement spreads stress distribution across multiple frequencies, preventing resonant conditions.
2Object-generated harmful factors
If the disc profile is made discontinuous to reduce noise, then rubbing noise is partially reduced, but the periodic stress pattern triggers mechanical resonance
Solution Approach 1:
The asymmetric, aperiodic spacing of notches breaks the periodicity of stress application, preventing the disc from vibrating at resonant frequencies while maintaining the noise-reducing discontinuous profile effect.
Solution Approach 2:
The patent changes the spatial parameter of notch positioning from uniform to aperiodic distribution. This parameter modification transforms the stress frequency spectrum, eliminating concentrated resonant frequencies while maintaining overall stress reduction.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The aperiodic pattern effectively reduces braking noise and mechanical resonance, enhancing the disc's ability to absorb thermal stresses and prevent deformation, while maintaining optimal braking performance.
Implementation Method 1
the markedly periodic stress imparted to the disc at a specific frequency by the braking action of the pad may generate mechanical resonance in the disc body
Implementation Method 2
an annular braking track intended to cooperate with pads of the brake for achieving braking of the wheel
Data Source
AI summary
A braking disc of a brake of a wheel of vehicles is intended to be fixed to the wheel to be braked and comprises an annular braking track intended to cooperate with pads of the brake for performing braking of the wheel. Along an edge of the braking track of the disc there is present a plurality of notches; at least a notch has an angular distance from the successive adjacent notch that is different from the angular distance thereof from the preceding adjacent notch.