-
1.发明授权公开(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.
-
2.发明授权公开(公告)号：US12044601B2
公开(公告)日：2024-07-23
申请号：US17628765
申请日：2021-07-26
Applicant: DALIAN UNIVERSITY OF TECHNOLOGY
Inventor： Xing Fu , Qing Zhang , Liang Ren , Hongnan Li
CPC classification number: G01M5/0041 , G01M5/0025 , E04H12/10
Abstract: The present invention belong to the technical field of lattice tower structure monitoring, and discloses a displacement reconstruction method for a lattice tower structure based on improved mode superposition. The method comprises: uniformly arranging D strain sensors on main member of a lattice tower along the height, processing collected strain data {ε}D×1 using a stochastic subspace identification (SSI) method to obtain a matrix [Ψ]D×nT of first n-order strain modes; calculating a function relation y(x) between a distance from a measuring point to a neutral layer and a height according to a lattice tower design drawing; performing polynomial fitting on the first n-order strain modes with a height coordinate x of the lattice tower respectively to obtain a strain mode function Ψi(x), expanding a function
Ψ
i
(
x
)
y
(
x
)
according to a Taylor formula, performing double integration on the expansion result and substituting same into a boundary condition, to obtain a displacement mode function Φi(x); evaluating a modal coordinate {q}n×1 by means of the least square method, substituting the height coordinate x of a displacement object point to be reconstructed, and multiplying the displacement mode function value Φi(x) by the modal coordinate {q}n×1. The improved mode superposition method of the present invention has the advantages of a small number of sensors required, simple calculation process, accurate calculation result, and strong operability and practicality.-
公开(公告)号：US11293175B2
公开(公告)日：2022-04-05
申请号：US16968782
申请日：2019-09-20
Applicant: DALIAN UNIVERSITY OF TECHNOLOGY
Inventor： Xing Fu , Hongnan Li , Wenlong Du , Xifeng Zhong
Abstract: A self-resetting tuned mass damper is based on eddy current and shape memory alloy technology. The self-resetting tuned mass damper comprises a hollow box, a cover plate, a bolt, a mass block, gears a, gears b, gears c, copper sheets, permanent magnet groups, partition boards, balls, pins, levers, shape memory alloys, rotating shafts a, rotating shafts b, a supporting plate and rotating shafts c. The movement of the mass block causes the copper sheets to rotate and generate eddy current for energy consumption. The copper sheets are rotated and amplified by adjusting the sizes of the gears. The displacement of a small mass block can cause rotation of the copper sheets by a large angle, which greatly increases energy consumption efficiency. The elongation of the shape memory alloys is amplified by adjusting the ratio of long and short force arms of the levers.
-
公开(公告)号：US11796031B2
公开(公告)日：2023-10-24
申请号：US17047592
申请日：2019-03-04
Applicant: DALIAN UNIVERSITY OF TECHNOLOGY
Inventor： Xing Fu , Hongnan Li , Wenlong Du
CPC classification number: F16F15/035 , H02K49/046 , E04B1/98 , F16F2222/06 , F16F2230/0005 , F16F2230/0052 , F16F2230/10 , F16F2232/00 , F16H1/22
Abstract: An axial displacement amplified eddy current damper is disclosed. The axial movement of a slide bar is converted into the rotation of copper sheets and generates eddy current for energy consumption. The copper sheets are rotated and amplified by adjusting the sizes of gears. The short displacement of the slide bar can cause a large angle rotation of the copper sheets, so that energy consumption efficiency is high. The damping parameter can be adjusted by adjusting the magnetic field strength of permanent magnets, the thickness of the copper sheets and the distance from the copper sheets to the permanent magnets. The permanent magnets are adopted to provide continuous magnetic field sources, without external energy, thereby generating long-term and stable vibration reduction effect.
-
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.
-
公开(公告)号：US11223190B2
公开(公告)日：2022-01-11
申请号：US16761169
申请日：2019-02-21
Applicant: DALIAN UNIVERSITY OF TECHNOLOGY
Inventor： Xing Fu , Hongnan Li , Wenlong Du
Abstract: An eddy current energy-dissipating spacer is mainly composed of a spacer frame, a conductor clamp and energy-dissipating elements. The eddy current energy-dissipating spacer not only provides the function of an ordinary spacer, but also reduces the vibration of the transmission lines; and at the same time, can effectively reduce the vibration of the transmission lines, especially the torsional vibration by adopting the eddy current and viscoelastic material for energy dissipation; improves the eddy current strength by adjusting the gear radius ratio, thus increasing the damping force; can adjust the damping parameters by adjusting the magnetic field strength of the permanent magnet; can produce long-term stable vibration reduction effect by adopting the permanent magnet to provide continuous magnetic field without additional external energy input; can effectively avoid the magnetic flux leakage of magnetic circuits by adopting the magnetic material.
-
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
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
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
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.
-
-
-
-
-
-
-
-
Search Results
9
records
(took 0.014 seconds)
