公开(公告)号：US20210209275A1

公开(公告)日：2021-07-08

申请号：US17059008

申请日：2019-08-09

Applicant: DALIAN UNIVERSITY OF TECHNOLOGY

Inventor： Li ZOU ,  Lizhi TANG ,  Zhe SUN ,  Yanshun ZHU ,  Yuguo PEI ,  Zhiqiang WANG ,  Weitong XU ,  Guoqing JIN ,  Zhen WANG

IPC: G06F30/28 ,  G06F30/17

Abstract: The present disclosure provides a parameter design and numerical simulation method for jet trencher nozzle, comprising the following steps: S1. designing parameters of nozzle; S2. selecting the parameters of nozzle; S3. establishing a geometric model; S4. setting boundary conditions and delineating grids; S5. performing numerical simulation using Flow-3D; and S6. performing results processing and analysis. According to the present invention, the whole process of nozzle flushing and ground breaking can be simulated, the size of the cross-section of the flushing trench is measured, and by analyzing the obtained result, the reasonability of nozzle radius parameter design can be verified, and a certain reference is provided for design of inclination angle parameters.

公开(公告)号：US20220390481A1

公开(公告)日：2022-12-08

申请号：US17596241

申请日：2019-12-31

Applicant: DALIAN UNIVERSITY OF TECHNOLOGY

Inventor： Li ZOU ,  Tiezhi SUN ,  Jiuming ZHANG ,  Yuguo PEI ,  Zhenhao LI ,  Xinyu MA ,  Zhe SUN ,  Zongbing YU

IPC: G01P5/20 ,  G06F17/16 ,  G06K9/62

Abstract: An improved modal decomposition method applicable to the analysis and reconstruction of the measured flow fields of internal solitary waves includes the following steps: S1. generating internal solitary waves and measuring a two-dimensional flow field sequence during the interaction of the internal solitary waves with the terrain; S2. extracting a target information from the two-dimensional flow field sequence and obtaining a flow field snapshot; S3. stitching the snapshots into a snapshot matrix in time order; S4. plotting the information density curve; S5. normalizing the information density curve and determining split points; S6. setting the snapshot matrix between two adjacent split points as a linear evolutionary characteristic stage; and S7. performing dynamic mode decomposition on the linear evolutionary characteristic stages.