公开(公告)号：US11913913B2

公开(公告)日：2024-02-27

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

IPC: G01M7/02 ,  G01N3/10 ,  G01N3/04

CPC classification number: G01N3/10 ,  G01M7/02 ,  G01N3/04

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.

公开(公告)号：US11248389B2

公开(公告)日：2022-02-15

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

IPC: E04H9/02 ,  E04B1/98

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.

公开(公告)号：US11953398B2

公开(公告)日：2024-04-09

申请号：US17917354

申请日：2022-03-10

Applicant: DALIAN UNIVERSITY OF TECHNOLOGY

Inventor： Xing Fu ,  Wenlong Du ,  Hongnan Li ,  Gang Li

IPC: G01L5/04 ,  G06F17/11

CPC classification number: G01L5/04 ,  G06F17/11

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.

公开(公告)号：US11754140B2

公开(公告)日：2023-09-12

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

IPC: E04H9/02 ,  F16F15/03

CPC classification number: F16F15/035 ,  E04H9/0237 ,  F16F2222/06 ,  F16F2236/10

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.

公开(公告)号：US09645054B2

公开(公告)日：2017-05-09

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 ,  B64C1/06 ,  G06F17/50

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 is described. In the method, a depression defect is introduced in a manner of applying a radial disturbance load. Then, an influence rule of a depression defect amplitude of a single point to an axial load bearing capacity is analyzed by using numerical values; 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, 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.

公开(公告)号：US11293415B2

公开(公告)日：2022-04-05

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.