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公开(公告)号：US20220129595A1
公开(公告)日：2022-04-28
申请号：US17291566
申请日：2020-06-28
Applicant: DALIAN UNIVERSITY OF TECHNOLOGY
Inventor： Shengfa WANG , Yu JIANG , Baojun LI , Yi WANG , Fengqi LI , Zhongxuan LUO
IPC: G06F30/10
Abstract: A design and optimization method of a porous structure for 3D heat dissipation based on triply periodic minimal surface (TPMS) belongs to the field of computer-aided design. Firstly, a porous structure is established through implicit function presentation of TPMS. Secondly, a heat dissipation problem is converted into a minimization problem of thermal compliance under given constraints according to a steady-state heat conduction equation. Then, parametric functions are directly computed through a global-local interpolation method. Finally, period optimization and wall-thickness optimization are conducted for a modeling problem to obtain an optimized porous shell structure with smooth period and wall-thickness change. The porous structure of the present invention greatly improves the heat dissipation performance, and efficiency and effectiveness of heat conduction. The porous structure designed by the present invention has the characteristics of smoothness, full connectivity, controllability and quasi-self-supporting. These characteristics ensure the applicability and the manufacturability of this structure.
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92.发明申请公开(公告)号：US20220121797A1
公开(公告)日：2022-04-21
申请号：US17291819
申请日：2020-07-13
Applicant: DALIAN UNIVERSITY OF TECHNOLOGY
Inventor： Ximing SUN , Nan DUAN , Yuhu WU , Chongquan ZHONG
Abstract: The present invention provides a method for analyzing global stability of a conveying fluid pipe-nonlinear energy sink system, and belongs to the technical field of system stability proof and analysis of a control system. The method comprises: establishing a high-order partial differential model of a conveying fluid pipe-nonlinear energy sink system based on a target energy transfer theory, discretizing the model into a second-order nonlinear ordinary differential form by means of the Galerkin approximation method, and further transforming the model into a quadratic model containing gradient information first; then obtaining a global stability judgment condition of the system by means of the energy disturbance technology, and verifying the theoretical results by means of the numerical method finally.
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公开(公告)号：US20220112353A1
公开(公告)日：2022-04-14
申请号：US17196662
申请日：2021-03-09
Applicant: Dalian University of Technology
Inventor： Zhenyu ZHANG , Yuefeng DU , Dongdong LIU , Liangchao GUO
IPC: C08K3/04
Abstract: The present invention provides a preparation method for ultra-high wear-resistant graphene epoxy resin composites, belonging to the technical field of macroscopic lubrication. The present invention firstly adopts a physical blending method to uniformly mix graphene powder and epoxy resin, and then cures the mixture at high temperature to prepare graphene epoxy resin composites with ultra-low wear rate. The present invention adopts a solution blending method to uniformly combine graphene and epoxy resin, improving the friction and wear performance of epoxy resin and expanding the application of epoxy resin in the field of tribology.
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94.发明授权公开(公告)号：US11300499B2
公开(公告)日：2022-04-12
申请号：US16885466
申请日：2020-05-28
Applicant: Dalian University of Technology
Inventor： Zhenfeng Gong , Tianli Gao , Yewei Chen , Qingxu Yu
Abstract: The present invention belongs to the technical field of trace gas detection, and relates to a multi-cavity semi-open resonant photoacoustic cell and a multi-gas simultaneous measurement system. The photoacoustic cell includes multiple resonant cavities. Each resonant cavity has a unique length and a unique resonant frequency, so each resonant cavity corresponds to one to-be-measured gas. A sensitive diaphragm of an acoustic sensor is fixed on one end face of the photoacoustic cell. Photoacoustic signals of different frequencies generated in the resonant cavities act on the sensitive diaphragm of the acoustic sensor, causing the sensitive diaphragm of the acoustic sensor to vibrate periodically. Concentration information of multiple to-be-measured gases can be obtained by analyzing the vibration of the sensitive diaphragm of the acoustic sensor.
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95.发明授权公开(公告)号：US11295245B2
公开(公告)日：2022-04-05
申请号：US16860443
申请日：2020-04-28
Applicant: DALIAN UNIVERSITY OF TECHNOLOGY
Inventor： Yu Li , Jiahui Deng , Bo Xu , Wei Ding , Huicheng Zhou , Chi Zhang
Abstract: A method and system for ecological operation of total phosphorus (TP) export of a cascade hydropower station are provided. The method includes: integrating total power generation and TP export of the cascade hydropower station into a single operation objective, and obtaining an operation objective under different weight ratios; optimizing the obtained operation objective; and obtaining a water level operation process corresponding to total power generation and TP export under the current operation objective through the optimized operation objective. The present invention alleviates an ecological and environmental problem caused by the construction of the hydropower station from a water quality mechanism, and can be widely used, for example, in the ecological optimal operation of cascade hydropower stations in a river basin.
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Patent Agency Ranking
公开(公告)号：US11293512B2
公开(公告)日：2022-04-05
申请号：US16761378
申请日：2018-10-18
Applicant: DALIAN UNIVERSITY OF TECHNOLOGY
Inventor： Xing Fu , Hongnan Li , Jia Wang , Wenlong Du
Abstract: The present invention discloses a multi-dimensional eddy current tuned mass damper, which belongs to the technical field of structural vibration control. A main body of the multi-dimensional eddy current tuned mass damper is composed of two hollow cylinders, wherein an inner hollow cylinder is located in an outer hollow cylinder, ball grooves are formed in the opposite upper and lower walls of the inner and outer hollow cylinders, rolling balls are installed in the ball grooves, and the inner hollow cylinder is rotated in the outer hollow cylinder through the rolling balls; the inner hollow cylinder is provided with an inner cover plate, and the outer hollow cylinder is provided with an outer cover plate, forming a relatively closed box body structure; an orthogonal bidirectional mass element, a stiffness element and an eddy current damping element are arranged in the inner hollow cylinder, and a torsional stiffness element and an eddy current damping element are arranged between the inner hollow cylinder and the outer hollow cylinder. The multi-dimensional eddy current tuned mass damper of the present invention is not only convenient to adjust in terms of mass, stiffness and damping parameters, but also has regular and beautiful appearance, simple structure, and very simple connection with a main structure.
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97.发明授权公开(公告)号：US11292057B2
公开(公告)日：2022-04-05
申请号：US16863199
申请日：2020-04-30
Applicant: Dalian University of Technology
Inventor： Zhubin He , Yi Xu , Jiangkai Liang , Wei Du , Peng Lin
IPC: B22F10/00 , B21D26/041 , B21D26/049 , B33Y10/00 , B22F10/10
Abstract: The present invention discloses a method for manufacturing a thin-walled metal component by three-dimensional (3D) printing and hot gas bulging. The present invention uses 3D printing to obtain a complex thin-walled preform, which reduces a deformation during subsequent hot gas bulging. The present invention avoids local bulging thinning and cracking, undercuts at the parting during die closing, and wrinkles due to the uneven distribution of cross-sectional materials, etc. The present invention obtains a high accuracy in the form and dimension through hot gas bulging. After a desired shape is obtained by hot gas bulging, a die is closed to keep the component under high temperature and high pressure for a period of time, so that a grain and a phase of the material are transformed to form a desired microstructure.
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公开(公告)号：US20220092428A1
公开(公告)日：2022-03-24
申请号：US17312278
申请日：2020-09-28
Applicant: DALIAN UNIVERSITY OF TECHNOLOGY
Inventor： Ximing SUN , Fuxiang QUAN , Hongyang ZHAO , Yanhua MA , Pan QIN
Abstract: The present invention relates to a prediction method for stall and surge of an axial compressor based on deep learning. The method comprises the following steps: firstly, preprocessing data with stall and surge of an aeroengine, and partitioning a test data set and a training data set from experimental data. Secondly, constructing an LR branch network module, a WaveNet branch network module and a LR-WaveNet prediction model in sequence. Finally, conducting real-time prediction on the test data: preprocessing test set data in the same manner, and adjusting data dimension according to input requirements of the LR-WaveNet prediction model; giving surge prediction probabilities of all samples by means of the LR-WaveNet prediction model according to time sequence; and giving the probability of surge that data with noise points changes over time by means of the LR-WaveNet prediction model, to test the anti-interference performance of the model.
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公开(公告)号：US20220088731A1
公开(公告)日：2022-03-24
申请号：US17424392
申请日：2020-02-17
Applicant: DALIAN UNIVERSITY OF TECHNOLOGY
Inventor： Jiang GUO , Bin WANG , Chuanping SONG
Abstract: A supporting device and method for a large thin-walled part is disclosed. The supporting device comprises a processing device and a supporting device. A workpiece is positioned between the processing device and the supporting device and is clamped at a periphery in a flexible clamping mode. A cutter in the processing device is connected with an iron core. A coil is wound on the iron core. When the coil is energized, a magnetic field is generated around the coil. A blade part of the cutter is in contact with a processing side of the workpiece. The supporting method combines the magnetorheological fluid technology with the jet supporting technology, and uses a jet impact force to offset part of a milling force. The current magnitude and winding mode of the coil are changed to control magnetic field intensity. The magnetorheological fluid is cured instantly to support the workpiece.
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公开(公告)号：US20220028043A1
公开(公告)日：2022-01-27
申请号：US17284394
申请日：2020-03-05
Applicant: DALIAN UNIVERSITY OF TECHNOLOGY
Inventor： Wei ZHONG , Haojie LI , Boqian LIU , Zhihui WANG , Risheng LIU , Zhongxuan LUO , Xin FAN
Abstract: A multispectral camera dynamic stereo calibration algorithm is based on saliency features. The joint self-calibration method comprises the following steps: step 1: conducting de-distortion and binocular correction on an original image according to internal parameters and original external parameters of an infrared camera and a visible light camera. Step 2: Detecting the saliency of the infrared image and the visible light image respectively based on a histogram contrast method. Step 3: Extracting feature points on the infrared image and the visible light image. Step 4: Matching the feature points extracted in the previous step. Step 5: judging a feature point coverage area. Step 6: correcting the calibration result. The present invention solves the change of a positional relationship between an infrared camera and a visible light camera due to factors such as temperature, humidity and vibration.
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