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.

公开(公告)号：US20230185973A1

公开(公告)日：2023-06-15

申请号：US17773399

申请日：2021-07-19

Applicant: DALIAN UNIVERSITY OF TECHNOLOGY

Inventor： Xing FU ,  Xingheng ZHANG ,  Hongnan LI

IPC: G06F30/10

CPC classification number: G06F30/10 ,  G06F2119/02

Abstract: Determining coordinates and an initial coordinate system of simulation points according to structural drawings, and transforming the coordinate system so that Y axis is parallel to the wind direction, to obtain a 3D model of N structural simulation points; projecting all the simulation points of the 3D model onto a target 2D plane, and transforming the simulation points into projection points on the 2D plane; calculating the delay time of the wind speed, that is, the time required to move from each point to the projection points on the target plane; using a 2D coherence function to consider the spatial correlation of different simulation points in horizontal and vertical directions; generating fluctuating wind speed by using harmony superposition method; and obtaining the wind speed time history of all the points by using the delay time.

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.

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

IPC: F16F15/03 ,  E04H9/02

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.