Ballastless track roadbed damage forewarning method and system considering uncertainty

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United States of America Patent

PATENT NO 11782185
SERIAL NO

18297455

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Abstract

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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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Patent Owner(s)

Patent OwnerAddress
SOUTHWEST JIAOTONG UNIVERSITYNO 111 NORTH PART OF THE TWO RING ROAD CHENGDU SICHUAN

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Gao, Jun Wuhan, CN 229 941
Liu, Kaiwen Chengdu, CN 6 157
Ni, Pengpeng Zhuhai, CN 2 0
Pei, Yanfei Tianshui, CN 1 0
Qiu, Ruizhe Zhengzhou, CN 1 0
Su, Qian Chengdu, CN 13 88

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