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公开(公告)号：US20210087841A1
公开(公告)日：2021-03-25
申请号：US16967683
申请日：2019-09-20
Applicant: DALIAN UNIVERSITY OF TECHNOLOGY
Inventor： Xing FU , Hongnan LI , Gang LI , Yao JIANG , Wenlong DU , Zhiqian DONG
Abstract: An inertial mass amplification type tuned mass damper is disclosed. The inertial mass amplification type tuned mass damper comprises a hollow box, an H-shaped mass block, gears a, gears b, a rectangular frame, a steel ring, viscous dampers, a steel sheet, springs, rotating shafts and balls. In the present invention, an inertial damping force is amplified by adjusting the radius ratio of the gears a and the gears b; and damping parameters can be conveniently changed by adjusting the mass of the mass block, the spring stiffness and the like. The present invention has the advantages that the design mass is small, which can avoid the adverse effects of excessive additional gravity on the structure and improve the performance of the structure. The present invention has reasonable design and small occupied space, can save more use area for buildings and can greatly improve the utilization efficiency of the buildings.
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2.发明申请METHOD FOR DETERMINING REDUCTION FACTOR OF BEARING CAPACITY OF AXIAL LOAD CYLINDRICAL SHELL STRUCTURE 有权用于确定轴向载荷圆柱形结构承载能力的减小因子的方法公开(公告)号：US20160187230A1
公开(公告)日：2016-06-30
申请号：US14781941
申请日：2014-02-12
Applicant: DALIAN UNIVERSITY OF TECHNOLOGY
Inventor： Bo WANG , Peng HAO , Gang LI , Kuo TIAN , Zeng MENG , Kaifan DU , Yan ZHOU , Xi ZHANG , Xiaohan TANG , Bin WANG , Hongzhi LUO
IPC: G01M99/00
CPC classification number: G01M99/007 , B64C1/068 , G06F17/5018 , G06F2217/16 , G06F2217/46
Abstract: A method for determining a reduction factor of a bearing capacity of an axial load cylindrical shell structure relates to stability checking of main bearing strength thin-walled members of aerospace and architectural structures. Different from experiment experience-based conventional defect sensitivity evaluating method represented by NASA SP-8007, a depression defect is introduced in a manner of applying a radial disturbance load. First, an influence rule of a depression defect amplitude of a single point to an axial load bearing capacity is analyzed by using numerical values, so as to determine a load amplitude range; then, defect sensitivity analysis is performed on depression defects of multiple points; then, experiment design sampling is performed by using load amplitude values and load position distribution as design variables; and finally, based on optimizing technologies such as an enumeration method, a genetic algorithm and a surrogate model, the most disadvantageous disturbance load of the multiple points that limits the defect amplitude is searched for, and a reduction factor of the bearing capacity of the axial load cylindrical shell structure is determined, so as to establish a more physical method for evaluating the defect sensitivity and the bearing performance of the axial load cylindrical shell structure.
Abstract translation: 用于确定轴向负载圆柱形壳结构的承载能力的减小因子的方法涉及航空航天和建筑结构的主轴承强度薄壁构件的稳定性检查。 与NASA SP-8007代表的基于实验经验的常规缺陷灵敏度评估方法不同，以施加径向干扰负荷的方式引入凹陷缺陷。 首先，通过使用数值分析单点到轴向载荷能力的凹陷缺陷幅度的影响规律，以确定载荷幅度范围; 然后对多个点的抑郁缺陷进行缺陷敏感性分析; 然后，通过使用负载幅度值和负载位置分布作为设计变量进行实验设计采样; 最后，基于枚举方法，遗传算法和代理模型等优化技术，搜索限制缺陷幅度的多个点的最不利的干扰负载，并且轴向承载能力的减小因子 确定负载圆柱壳结构，以建立更为物理的方法来评估轴向负载圆柱壳结构的缺陷灵敏度和轴承性能。
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公开(公告)号：US20240169020A1
公开(公告)日：2024-05-23
申请号：US18025235
申请日：2022-06-10
Applicant: DALIAN UNIVERSITY OF TECHNOLOGY
Inventor： Xing FU , Xingheng ZHANG , Hongnan LI , Gang LI , Shi GAN , Wenlong DU
IPC: G06F17/16 , G06F30/20 , G06F111/10
CPC classification number: G06F17/16 , G06F30/20 , G06F2111/10
Abstract: A wind field interpolation simulation method based on isogeometric sampling, the main steps of generating a wind speed time series in the present invention are as follows: first, inputting basic parameters of wind field simulation and the number of initial sampling points, and selecting the sampling points by an isogeometric sampling method. Then calculating the maximum relative error of all frequency bands by a relative error defined, and judging a fitting error and an allowable error given. If the fitting error is greater than the allowable error, increasing the number of sampling points and reselecting the sampling points; if the fitting error is less than or equal to the allowable error, finishing point selection, and using an interpolation function to calculate a lower triangular matrix required by the simulation. Thus a fluctuating wind field can be generated by a harmonic superposition method.
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4.发明申请公开(公告)号：US20230058314A1
公开(公告)日：2023-02-23
申请号：US17617867
申请日：2021-06-30
Applicant: DALIAN UNIVERSITY OF TECHNOLOGY
Inventor： Hongnan LI , Linsheng HUO , Gang LI , Jing ZHOU , Zhuodong YANG
Abstract: A structure multi-dimensional loading test system considering real complex boundary conditions considering real complex boundary conditions comprises a main part of machine, a base part, a hydraulic power supply and a control system. The system can simulate the load borne by a structure in a real working environment better and more accurately, realize multi-dimensional loading of the structure with six degrees of freedom in space and provide more real and valuable experimental data for the research on damage of reinforced concrete materials, components and structures under the action of an earthquake, and the research results will help researchers further reveal the damage mechanism of reinforced concrete structures, put forward the corresponding damage criteria and develop the corresponding seismic design methods.
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公开(公告)号：US20250163983A1
公开(公告)日：2025-05-22
申请号：US18560630
申请日：2023-02-03
Applicant: DALIAN UNIVERSITY OF TECHNOLOGY
Inventor： Zhiqian DONG , Gang LI , Baolin SUN , Hongnan LI
IPC: F16F7/08
Abstract: A 3D variable damping vibration isolator based on rubber friction and extrusion mechanism is composed of a base, an upper plate, a vibration isolation spring, “ ” shaped bolts, lock nuts, damped rubber blocks and a shell. The damped rubber blocks are vulcanized and bonded to the external vertical surfaces of vertical steel angles uniformly distributed on the base and are opposite to each other in pairs; the upper end of each “” shaped bolt is fixed to the upper plate by upper and lower (two) lock nuts, and cross bars at the lower end are squeezed by the damped rubber blocks on both sides; contact surfaces of the damped rubber blocks and the “” shaped bolts are flat-a design of variable cross-section. The vibration isolation spring is sheathed between the base and a lug boss in the center of the upper plate.
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Patent Agency Ranking
6.发明申请公开(公告)号：US20250138209A1
公开(公告)日：2025-05-01
申请号：US18641019
申请日：2024-04-19
Applicant: DALIAN UNIVERSITY OF TECHNOLOGY
Inventor： Yaohui XUE , Zhiqian DONG , Gang LI , Dinghao YU , Yaozhong CUI , Hongnan LI
Abstract: A multi-mode surface-wave free-field inversion method based on dispersion properties of layered media addresses the inaccuracy in existing methods that ignore higher modes. A novel approach for characterizing the participation quantity of each mode is proposed based on an energy flux density, which is applied to calculate a modal participation factor through dispersion curves and the frequency-domain dynamic stiffness matrix. Next, the ground surface-wave components with dispersion properties are transferred from the time domain to the frequency domain and decomposed into harmonic components composed of individual frequencies by the Fast Fourier Transform technology. These harmonic components continue to be decoupled as multiple modes by the modal participation factors, with each single-mode component being inverted to construct single-mode surface-wave free fields. Finally, all single-mode surface-wave free fields are superimposed following the mode superposition principle to form the multi-mode surface-wave free fields.
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7.发明公开公开(公告)号：US20240264322A1
公开(公告)日：2024-08-08
申请号：US18641022
申请日：2024-04-19
Applicant: DALIAN UNIVERSITY OF TECHNOLOGY
Inventor： Gang LI , Yaohui XUE , Zhiqian DONG , Dinghao YU , Hongnan LI
Abstract: The present invention provides a multi-phase wavefield inversion method considering both body waves and surface waves in half-space of rock media to address the deficiency in existing methods that neglect surface wavefields. In the present invention, Rayleigh components that strictly satisfy standard elliptic polarization characteristics in a half-space are extracted with Snell's Law of complex angles and the forward modeling and inversion theory of body waves. Then, the phase separation is executed to separate the body and Rayleigh waves. The pre-arrival components of S-waves are truncated to solve optimal incident angles of body waves. Thus, a Rayleigh wavefield inversion is implemented with ground Rayleigh components, and a body wavefield inversion is implemented with ground body components and their incident angles. Finally, based on linear elastic characteristics of the half-space of rock media, single-phase body wavefields and Rayleigh wavefields are superposed to form total multi-phase wavefields with the linear superposition principle.
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8.发明申请公开(公告)号：US20220074393A1
公开(公告)日：2022-03-10
申请号：US17297872
申请日：2020-07-31
Applicant: DALIAN UNIVERSITY OF TECHNOLOGY
Inventor： Xing FU , Hongnan LI , Gang LI , Zhiqian DONG , Zhikai XU , Xingheng ZHANG
IPC: F03G7/06
Abstract: The present invention belongs to the technical field of structural vibration control, and provides a composite axial energy consumption device based on piezoelectricity and shape memory alloy, comprising a screw, steel pipes, stiffening ribs, steel sheets, bolt-nuts, piezoceramics, screw caps and SMA wire bundles. The mechanical energy of the structure under pressure is converted into the electric energy of the piezoceramics and then the electric energy is converted into heat energy, so that energy consumption efficiency is high and mechanical performance is good. The SMA wire bundles have large tensile bearing capacity, shape memory effect and good corrosion resistance and fatigue resistance. The number of the segments and the specifications of the piezoceramics and the SMA wire bundles can be adjusted according to the actual needs, so that the structure can be adjusted according to the size of an axial force and specific stress conditions.
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公开(公告)号：US20210148434A1
公开(公告)日：2021-05-20
申请号：US16967695
申请日：2019-09-20
Applicant: DALIAN UNIVERSITY OF TECHNOLOGY
Inventor： Xing FU , Hongnan LI , Gang LI , Xingheng ZHANG , Zhiqian DONG , Wenlong DU
Abstract: The present invention discloses a coupling beam eddy current damper with shear displacement amplification. The coupling beam eddy current damper with shear displacement amplification comprises a rigid rod, rotating shafts, a pin column, pins, levers, screws, thread sleeves, copper sheets, permanent magnet components, a steel structural component, balls, ball supports and an outer shell. When vibration occurs, coupling beams on both sides of the damper are relatively vertically displaced; at this moment, two levers move up and down relative to the rigid rod; the movement causes the screws and the copper sheets to rotate; the copper sheets rotate in a magnetic field, then induced electromotive force will generates inside the magnetic field, thereby generating eddy current in the copper sheets. The eddy current effect will produce a damping force that impedes the rotation of the copper sheets.
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公开(公告)号：US20230288276A1
公开(公告)日：2023-09-14
申请号：US17917354
申请日：2022-03-10
Applicant: DALIAN UNIVERSITY OF TECHNOLOGY
Inventor： Xing FU , Wenlong DU , Hongnan LI , Gang LI
Abstract: --The present invention belongs to the technical field of disaster prevention and reduction of transmission lines, and provides a quasi-static calculation method for lateral unbalanced force of transmission lines. The present invention can quantify significant unbalanced force caused by a failed tower to an adjacent tower, thus to quantitatively evaluate cascading failure risk of transmission lines. The present invention does not need a lot of iteration, and can parametrically reveal influence of various factors on unbalanced force. The present invention quantifies influence of large deformation effect of a conducting wire on wind load, and at the same time, wind load of the conducting wire is corrected by the trapezoidal equivalent wind pressure proposed, which avoids wind load calculation error of the conducting wire caused by a relatively large vertical height difference, better reflects actual mechanical state of the lines, and optimizes existing wind load calculation method of transmission lines.--
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