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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
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.
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Patent Agency Ranking
公开(公告)号：US20220307956A1
公开(公告)日：2022-09-29
申请号：US17596258
申请日：2020-07-02
Applicant: DALIAN UNIVERSITY OF TECHNOLOGY
Inventor： Guiyong ZHANG , Shuwen SHI , Tiezhi SUN , Yingjie GAO , Taian HU , Chenrui TIAN , Bo ZHOU , Zhe SUN , Yichen JIANG , Yuguo PEI
Abstract: A test device suitable for acceleratory oblique water entry of a wedge has a frame, a water tank placed below the frame, an accelerator installed above the frame, an obliquing device connected to the frame, a wedge connected to the obliuqing device and an observation system. The frame is provided with vertical slide rails and a transverse slide rail. The accelerator mainly includes an air cylinder and an air compressor. The wedge is a flexible wedge or a rigid wedge. The observation system includes a pressure sensor, a strain sensor, a velocity sensor, an acceleration sensor and a particle image velocimetry device. The repeatability of the test process can be ensured by controlling the output pressure of the air cylinder.
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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
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.
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公开(公告)号：US20210108986A1
公开(公告)日：2021-04-15
申请号：US17044773
申请日：2019-08-09
Applicant: DALIAN UNIVERSITY OF TECHNOLOGY
Inventor： Guiyong ZHANG , Yuyan JIANG , Zhi ZONG , Zhe SUN , Hao WANG , Biye YANG , Zhihong YIN , Ning LIU
Abstract: The present disclosure discloses a method of ship ice resistance model experiment based on non-refrigerated model ice, including the following steps: determining the overall length L1, breadth B and scale ratio λ of a selected ship model; determining the size A1 of an experimental area for placing broken ice in the ship ice resistance model experiment; determining the characteristic length of model ice; determining the quantitative proportion of the model ice for each size under the target coverage ratio c of the model; obtaining the number of the model ice for each size under the target coverage ratio according to the quantitative proportion of the model ice for each size under the target coverage ratio c and the total area A2 of the model ice; determining the geometrical shape and parameters of each size under the target coverage ratio c of the model ice. The present disclosure solves the problems of poor economy and poor operability in a freezing model ice experiment of an ice basin, and provides a design method for carrying out a ship ice resistance model experiment in a towing tank.
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公开(公告)号：US20210086877A1
公开(公告)日：2021-03-25
申请号：US16950886
申请日：2020-11-17
Applicant: DALIAN UNIVERSITY OF TECHNOLOGY
Inventor： Zhe SUN , Yanzeng DENG , Guiyong ZHANG , Zhi ZONG , Hao WANG
Abstract: Disclosed is a method for analyzing hydroelastic effect of a marine structure based on moving particle semi-implicit method and modal superposition method. The method is based on a fluid dynamic solver of a moving particle semi-implicit method (MPS) and a structural response solver of a mode superposition method, and the fluid dynamic solver and the structural response solver achieve strong coupling in a time domain in an iterative mode. According to the present disclosure, the deficiency of the traditional potential flow-based hydroelesticity calculation (i.e. cannot directly simulate the severe deformation of the free surface and the slamming phenomenon of the ship body) is improved, and the problem of mutual influence between the rigidity of the structure and the flexible motion modal is considered.
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公开(公告)号：US20210172831A1
公开(公告)日：2021-06-10
申请号：US16957804
申请日：2019-08-09
Applicant: DALIAN UNIVERSITY OF TECHNOLOGY
Inventor： Zhi ZONG , Zhihong YIN , Guiyong ZHANG , Zhe SUN , Hao WANG , Biye YANG , Yuyan JIANG , Zhaoyang CHEN , Tao YANG
Abstract: The present disclosure discloses a method of ice distribution and data processing for ship ice resistance experiment in broken ice field, the ice floe is uniformly distributed in the broken ice field before each ship ice resistance experiment with eliminating the mutually overlapped broken ice to make it close to the experimental design working condition, and independent repeated experiments are carried out on each ship ice resistance experiment to reduce the influence of accidental factors; after finishing the experiment, the experimental data are divided into intervals and the experimental data corresponding to unreasonable subdomains are eliminated by mathematical statistics, and the uncertainty analysis is carried out; image correction is carried out for pictures of in broken ice field in the pre-experimental data, and the pictures are divided to obtain subdomain pictures to calculate the actual coverage rate of each subdomain; the ice resistance in the experimental data corresponding to each remaining subdomain is modified, so as to make the experimental data more reliable.
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