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公开(公告)号：US20240034437A1
公开(公告)日：2024-02-01
申请号：US18258370
申请日：2022-10-27
Applicant: DALIAN UNIVERSITY OF TECHNOLOGY
Inventor： Tiezhi SUN , Yao LI , Zhi ZONG , Di ZHANG , Shisheng WANG
CPC classification number: B63B1/38 , B63G8/001 , B63B2001/382
Abstract: A jet-propelled water-entry composite buffer device for multi-channel gas recycling includes a head fairing, an underwater vehicle, a buffer, a cavitator and a side fairing. The side fairing is internally provided with a fairing body and a sealing choke plate, and a high-pressure gas cavity, a transition cavity and a sub-high-pressure gas cavity are formed by the fairing body and the sealing choke plate from front to back; a quota air pressure valve is disposed on the sealing choke plate; the fairing body is provided with pressure reducing holes; the high-pressure gas cavity, the transition cavity and the sub-high-pressure gas cavity form an gas cushion buffer. Gas acceleration holes communicated with the high-pressure gas cavity are further provided in the outer wall of the side fairing, so that a supercavity can be more favorably formed after the underwater vehicle enters water.
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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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Patent Agency Ranking
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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4.发明公开公开(公告)号：US20240246637A1
公开(公告)日：2024-07-25
申请号：US18560453
申请日：2022-10-27
Applicant: DALIAN UNIVERSITY OF TECHNOLOGY
Inventor： Yao LI , Tiezhi SUN , Zhi ZONG
IPC: B63B1/36
CPC classification number: B63B1/36
Abstract: A cavitation load-reduction device for an underwater vehicle has adjustable water-entry angles. It contains a cavitator disposed at a head end of an underwater vehicle, a front end of the cavitator being detachably connected to a head fairing device that is coaxially arranged with the cavitator. The head fairing device comprises a head fairing, a plurality of notches are arranged in a rear end of a side wall of the head fairing around an axis of the head fairing, fairing tiles hinged to the notches are arranged at the notches, and the fairing tiles are matched with the notches. Each fairing tile retractable arm is separately hinged to the fairing tile and the cavitator, and the fairing tile retractable arms are used to drive the fairing tiles to rotate around a hinge point of the fairing tiles and the head fairing.
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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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6.发明公开公开(公告)号：US20240182137A1
公开(公告)日：2024-06-06
申请号：US18552022
申请日：2022-10-27
Applicant: DALIAN UNIVERSITY OF TECHNOLOGY
Inventor： Tiezhi SUN , Yao LI , Zhi ZONG , Bohan XIE
IPC: B63B1/38
CPC classification number: B63B1/38 , B63B2001/382
Abstract: A combined disc-type cavitation structure for underwater navigation of an underwater vehicle has an underwater vehicle and a fairing. A plurality of cavitators having sequentially increased outer diameters are sequentially arranged in the fairing. A cavitator receiving groove matched with the cavitator located on the front side is arranged in the center of the front surface of the cavitator located on the rear side in every two adjacent cavitators. The plurality of cavitators can be integrated into a whole by means of the cavitator receiving groove. The cavitator located at the front-most end is a first cavitator, and the remaining cavitators are second cavitators. The first cavitator is connected to the underwater vehicle by means of a buffer. Each second cavitator is respectively connected to the underwater vehicle by means of a driving device configured to axially move the corresponding second cavitator.
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公开(公告)号：US20240149980A1
公开(公告)日：2024-05-09
申请号：US18550559
申请日：2022-10-27
Applicant: DALIAN UNIVERSITY OF TECHNOLOGY
Inventor： Tiezhi SUN , Yao LI , Zhi ZONG
IPC: B63B1/38
CPC classification number: B63B1/38 , B63B2001/382
Abstract: An adjustable cavitator structure has a cavitator disposed at a head end of the underwater vehicle. The cavitator has a cavitator body, a center of which is connected to the head center of the underwater vehicle through a damper. The front end of the cavitator body is detachably connected with a head fairing device. The cavitator body is of a double-layer structure including a first layer and a second layer. A plurality of cavitator disc face retractable sheets are installed on the first layer and the second layer and are evenly distributed around the axis of the cavitator body, and are slidably connected with the corresponding first layer or second layer. A buffer driving mechanism for driving the cavitator disc face retractable sheets to slide in a radial direction of the cavitator body is installed at the head end of the underwater vehicle.
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