Ballastless track roadbed damage forewarning method and system considering uncertainty
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United States of America Patent
Stats
-
Oct 10, 2023
Grant Date -
N/A
app pub date -
Apr 7, 2023
filing date -
Apr 8, 2022
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A ballastless track roadbed damage forewarning method considering uncertainty includes the following steps. Step 1: counting roadbed material parameters and precipitation; Step 2: establishing a FLAC-PFC model of a ballastless track roadbed and calibrating mesoscopic parameters of a roadbed surface layer; Step 3: generating a lognormal random field of particle contact friction coefficients and assigning it to particle contact nodes of the roadbed surface layer; Step 4: perform sampling on the precipitation and adjusting a fluid domain of the roadbed surface layer; Step 5: determining a worst spatial correlation distance in the random field; and Step 6: calculating a damage probability pf of the roadbed surface layer under the worst spatial correlation distance; outputting alarm information when pf exceeds an alarm threshold, otherwise, quitting. The method monitors and gives early warning of damage to the roadbed surface layer under dynamic loads, ensuring driving safety.
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International Classification(s)
- 2023 Application Filing Year
- B61L Class
- 172 Applications Filed
- 44 Patents Issued To-Date
- 25.59 % Issued To-Date
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- 0 Citation Count
- B61L Class
- 0 % this patent is cited more than
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