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    Method and system for controlling vibration of rotor in turboshaft engine
    3.
    发明授权
    Method and system for controlling vibration of rotor in turboshaft engine 有权

    公开(公告)号：US11840935B2

    公开(公告)日：2023-12-12

    申请号：US17879936

    申请日：2022-08-03

    申请人： Hunan University of Science and Technology

    发明人： Guangfu Bin ,  Chao Li ,  Qingxiong Lu ,  Yangyan Zhang ,  Jian Li ,  Huiyu Xu ,  Weimin Wang ,  Pingping Yang

    IPC分类号： B64D31/00 ,  F01D25/16 ,  B64D31/06

    CPC分类号： F01D25/164 ,  B64D31/00 ,  B64D31/06 ,  F05D2260/96

    摘要： A method and system for controlling a vibration of a rotor in a turboshaft engine are provided. The method includes: establishing, based on a kinetic model for a rotor-casing system, a mapping matrix indicating a correspondence among an unbalance, an oil film clearance, and a vibration response; performing determination on a real-time vibration response, and skipping adjustment if the real-time vibration response is smaller than a response threshold; otherwise, approximately matching a real-time oil film clearance and the real-time vibration response with the mapping matrix to obtain a real-time unbalance; obtaining, based on the real-time unbalance and the mapping matrix, a preferred vibration response, and further obtaining a preferred oil film clearance; based on the preferred oil film clearance and the real-time oil film clearance, obtaining a clearance adjustment amount; generating a control signal based on the clearance adjustment amount, and performing adjustment based on the control signal.

    METHOD AND SYSTEM FOR CONTROLLING VIBRATION OF ROTOR IN TURBOSHAFT ENGINE
    4.
    发明公开
    METHOD AND SYSTEM FOR CONTROLLING VIBRATION OF ROTOR IN TURBOSHAFT ENGINE 审中-公开

    公开(公告)号：US20230366328A1

    公开(公告)日：2023-11-16

    申请号：US17879936

    申请日：2022-08-03

    申请人： Hunan University of Science and Technology

    发明人： Guangfu Bin ,  Chao Li ,  Qingxiong Lu ,  Yangyan Zhang ,  Jian Li ,  Huiyu Xu ,  Weimin Wang ,  Pingping Yang

    IPC分类号： F01D25/16

    CPC分类号： F01D25/164 ,  F05D2260/96

    摘要： A method and system for controlling a vibration of a rotor in a turboshaft engine are provided. The method includes: establishing, based on a kinetic model for a rotor-casing system, a mapping matrix indicating a correspondence among an unbalance, an oil film clearance, and a vibration response; performing determination on a real-time vibration response, and skipping adjustment if the real-time vibration response is smaller than a response threshold; otherwise, approximately matching a real-time oil film clearance and the real-time vibration response with the mapping matrix to obtain a real-time unbalance; obtaining, based on the real-time unbalance and the mapping matrix, a preferred vibration response, and further obtaining a preferred oil film clearance; based on the preferred oil film clearance and the real-time oil film clearance, obtaining a clearance adjustment amount; generating a control signal based on the clearance adjustment amount, and performing adjustment based on the control signal.

    Denoising optimization method for AC traction motor by chamfering stator tooth shoulder with inscribed arc
    6.
    发明授权
    Denoising optimization method for AC traction motor by chamfering stator tooth shoulder with inscribed arc 有权

    公开(公告)号：US11799353B2

    公开(公告)日：2023-10-24

    申请号：US17212088

    申请日：2021-03-25

    申请人： HUNAN UNIVERSITY OF SCIENCE AND TECHNOLOGY

    发明人： Xiaoping Zhang ,  Donghao Liu ,  Bo Fu

    IPC分类号： H02K5/24 ,  G06F30/23

    CPC分类号： H02K5/24 ,  G06F30/23 ,  H02K2213/03

    摘要： A denoising optimization method for an AC traction motor by chamfering a stator tooth shoulder includes taking an angular vertex of the stator tooth shoulder as an end point, obtaining two points equidistantly along two sides of a stator tooth shoulder angle from the end point; and using the two points as tangent points D1 and D2 of the inscribed arc; making the inscribed arc of the tooth shoulder angle through the two tangent points D1 and D2, cutting off the tooth shoulder angle along the inscribed arc, and adjusting an oblique height HS1 of a stator tooth pole shoe. The invention obtains optimal values of a chamfering size and oblique height of a stator tooth slot pole shoe by adjusting the oblique height of the stator tooth pole shoe and adopting a particle swarm optimization algorithm.

    COMPOSITE DECK STRUCTURE FOR BRIDGE AND BRIDGE STRUCTURE AND CONSTRUCTION METHOD THEREOF
    7.
    发明公开
    COMPOSITE DECK STRUCTURE FOR BRIDGE AND BRIDGE STRUCTURE AND CONSTRUCTION METHOD THEREOF 审中-公开

    公开(公告)号：US20230287640A1

    公开(公告)日：2023-09-14

    申请号：US18319713

    申请日：2023-05-18

    申请人： HUNAN UNIVERSITY

    发明人： Xudong SHAO ,  Xuan SUN ,  Junhui CAO ,  Deqiang ZOU ,  Weidong LI

    IPC分类号： E01D2/02 ,  E01D19/12 ,  E01D2/04 ,  E01D21/00

    CPC分类号： E01D2/02 ,  E01D2/04 ,  E01D19/125 ,  E01D21/00 ,  E01D2101/268

    摘要： Disclosed are a composite deck structure for a bridge, and a bridge structure and a construction method thereof. The composite deck structure includes a top plate (1), longitudinal ribs (2), and transverse ribs (3), where the longitudinal ribs (2) are fixedly connected to the transverse ribs (3), and are connected to the diaphragms (4) by means of the transverse ribs (3), and the transverse ribs (3) are not provided with cutouts for accommodating the longitudinal ribs (2). According to the composite deck structure, no cutout is provided on the diaphragms (4), and stress generated by the cutouts is reduced; hot-rolled section steel is used for longitudinal ribs (2) and transverse ribs (3) instead of welded steel plates, such that welding seams are reduced and fatigue resistance of the composite deck structure is improved.

    TESTING DEVICE FOR SIMULATING FRICTIONAL WEAR BEHAVIORS OF THREADED JOINT OF DRILL PIPE UNDER TURBID SEAFLOOR ENVIRONMENT
    8.
    发明公开
    TESTING DEVICE FOR SIMULATING FRICTIONAL WEAR BEHAVIORS OF THREADED JOINT OF DRILL PIPE UNDER TURBID SEAFLOOR ENVIRONMENT 审中-公开

    公开(公告)号：US20230273089A1

    公开(公告)日：2023-08-31

    申请号：US18314660

    申请日：2023-05-09

    申请人： HUNAN UNIVERSITY OF SCIENCE AND TECHNOLOGY

    发明人： Yongping JIN ,  Chang WU ,  Deshun LIU

    IPC分类号： G01M5/00

    CPC分类号： G01M5/0033 ,  G01M5/0025

    摘要： A testing device for simulating frictional wear behaviors of threaded joints of a drill pipe under turbid seafloor environment, including a support, an oil cylinder, upper and lower specimens, a first motor, several second motors, stirring rods, a turbidity sensor, and a test tank. The oil cylinder and test tank are arranged on the support. A piston rod of the oil cylinder is connected to the first motor. A rotating-speed sensor is arranged on a bottom surface of the first motor, facing toward an output shaft of the first motor. The output shaft of the first motor is connected to an upper end of a torque limiter. A lower end of the upper specimen fits an upper end of the lower specimen under loading of a main shaft of the first motor. The stirring rods are provided at two sides of the test tank.