公开(公告)号：US20230228618A1

公开(公告)日：2023-07-20

申请号：US17798685

申请日：2021-11-05

Applicant: SOUTHEAST UNIVERSITY

Inventor： Wen XIONG ,  Rongzhao ZHANG

IPC: G01H17/00

CPC classification number: G01H17/00

Abstract: The present disclosure discloses a dynamic identification method of bridge scour based on health monitoring data, including: collecting an acceleration-time curve of a bridge foundation structure when vibrating: collecting the acceleration-time curve of each bridge foundation structure in a scour state by a health monitoring system when each bridge foundation structure vibrates; obtaining a warning control threshold of abnormal warning of a time-frequency change of a first-time scour bridge evaluation reference mode by calculation; identifying an abnormal segment in frequency segments of a scoured bridge to be identified; identifying an abnormal time-frequency sequence in the time-frequency abnormal segment: updating a warning control threshold of its own random fluctuation of time-frequency characteristics of a bridge scour reference mode after completing scour early warning of the abnormal sequence, so as to prepare for next anomaly identification and scour early warning. The present disclosure provides a method for dynamically identifying a foundation scour depth by performing dynamic characteristic analysis of a structural system, and the identification method can realize the technical features of long-term dynamic scour monitoring and early warning of underwater foundations.

公开(公告)号：US20240256740A1

公开(公告)日：2024-08-01

申请号：US18546570

申请日：2022-12-28

Applicant: SOUTHEAST UNIVERSITY

Inventor： Wen XIONG ,  Rongzhao ZHANG

IPC: G06F30/25 ,  G06F17/11 ,  G06F30/28

CPC classification number: G06F30/25 ,  G06F17/11 ,  G06F30/28 ,  G06F2111/10

Abstract: The present disclosure discloses a foundation scour fluid-solid-soil coupling simulation algorithm based on SPH-DEM coupling and a multiphase flow theory, including: constructing a particle model, setting fluid particles and bed material particles based on the multiphase flow theory, and setting rigid particles based on a DEM theory; correcting a fluid control equation based on a fluid-solid coupling theory, and solving governing equations of the fluid particles; solving governing equations of DEM rigid particles by introducing fluid-solid coupling force, introducing fluid-soil and soil-solid coupling force to correct a sediment incipient motion model, based on a sediment Shield criterion, and solving foundation scour governing equations; and finishing a time step and entering next cycle. The present disclosure introduces a plurality of structure and state models through secondary development based on the SPH-DEM coupling and the multiphase flow theory, thereby realizing refined numerical simulation of foundation scour fluid-solid-soil coupling.