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The dynamic amplification factor (DAF) and dynamic load coefficient (DLC) depend on the road surface roughness condition.
Figure 5 Road roughness condition (Average IRI) and acceleration data (Magnitudes) relationship for smartphone C in the total range of frequency (0 to 50 Hz).
Figure 8 Relationship of road roughness condition (Average IRI) and acceleration data (Magnitudes) for smartphone C in the frequency range 40 to 50 Hz.
In other words, data from the smartphone acceleration sensors at the frequency range of 40 to 50 Hz is best in expressing the road roughness condition.
Using smartphone sensors to estimate road roughness condition has a great potential, since many similar sensors are already in use in many sophisticated road roughness profilers.
Figure 6 Road roughness condition (Average IRI) and acceleration data (Magnitudes) relationship for smartphone D in the total range of frequency (0 to 50 Hz).
Similar(38)
The roughness parameters of the cast iron discs were varied by electro discharge machining (EDM) and grinding processes, producing four distinct surface roughness conditions.
In summary, vegetation cover, freezing soil and snow cover are important factors influencing the land surface roughness conditions.
The friction factor of an open channel flow is generally affected by the Reynolds number and the roughness conditions, and can be decided by laboratory or field measurements.
The developed method provides an evaluation of the slip and shear stress distributions, which allow assessing the influence of surface roughness conditions.
Using the international roughness index (IRI) to assess public roads in local cities of Japan's Hokkaido prefecture, this study also provides real-time monitoring of pavement roughness conditions.
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