The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 10, 2023
Filed:
Apr. 07, 2023
Southwest Jiaotong University, Chengdu, CN;
Kaiwen Liu, Chengdu, CN;
Ruizhe Qiu, Zhengzhou, CN;
Qian Su, Chengdu, CN;
Jun Gao, Wuhan, CN;
Pengpeng Ni, Zhuhai, CN;
Yanfei Pei, Tianshui, CN;
SOUTHWEST JIAOTONG UNIVERSITY, Chengdu, CN;
Abstract
A ballastless track roadbed damage forewarning method considering uncertainty includes the following steps. Step: counting roadbed material parameters and precipitation; Step: establishing a FLAC-PFC model of a ballastless track roadbed and calibrating mesoscopic parameters of a roadbed surface layer; Step: generating a lognormal random field of particle contact friction coefficients and assigning it to particle contact nodes of the roadbed surface layer; Step: perform sampling on the precipitation and adjusting a fluid domain of the roadbed surface layer; Step: determining a worst spatial correlation distance in the random field; and Step: 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.