公开(公告)号：US12049936B2

公开(公告)日：2024-07-30

申请号：US18307072

申请日：2023-04-26

Applicant: Harbin Engineering University

Inventor： Fuzhen Pang ,  Haichao Li ,  Cong Gao ,  Xueren Wang ,  Yuan Du ,  Yang Tang ,  Shengyao Gao ,  Changwei Su ,  Yuxuan Qin ,  Ran Liang ,  Yuhang Tang ,  Xin Li

IPC: F16F15/023 ,  F16F15/02 ,  F16M5/00 ,  F16M11/22

CPC classification number: F16F15/023 ,  F16F15/022 ,  F16M5/00 ,  F16M11/22 ,  F16F2222/12 ,  F16F2230/007 ,  F16F2232/08 ,  F16M2200/08

Abstract: The present disclosure provides an efficient vibration reduction and isolation base supported by a chained panel fluid bladder, including a chained panel, the vibration reduction fluid bladder, vertical limiting devices and a bottom plate. The chained panel is a discontinuous structure formed by connecting chained substructure panels in series by panel hinge devices. The vibration reduction fluid bladder and the vertical limiting devices are fixedly installed between the chained panel and the bottom plate. The chained panel is constructed based on the impedance mismatch principle and provided with a mechanical device. Mechanical vibration energy is dissipated twice by the chained panel and the vibration reduction fluid bladder, thereby greatly reducing influences of mechanical device operation on a hull structure. The present disclosure abandons a traditional base design of a continuous panel, is simple in structure and good in vibration reduction performance, and has good economy and wide application prospects.

公开(公告)号：US20230265907A1

公开(公告)日：2023-08-24

申请号：US18307072

申请日：2023-04-26

Applicant: Harbin Engineering University

Inventor： Fuzhen Pang ,  Haichao Li ,  Cong Gao ,  Xueren Wang ,  Yuan Du ,  Yang Tang ,  Shengyao Gao ,  Changwei Su ,  Yuxuan Qin ,  Ran Liang ,  Yuhang Tang ,  Xin Li

IPC: F16F15/023 ,  F16F15/02 ,  F16M11/22 ,  F16M5/00

CPC classification number: F16F15/023 ,  F16F15/022 ,  F16M11/22 ,  F16M5/00 ,  F16F2230/007 ,  F16F2222/12 ,  F16F2232/08 ,  F16M2200/08

Abstract: The present disclosure provides an efficient vibration reduction and isolation base supported by a chained panel fluid bladder, including a chained panel, the vibration reduction fluid bladder, vertical limiting devices and a bottom plate. The chained panel is a discontinuous structure formed by connecting chained substructure panels in series by panel hinge devices. The vibration reduction fluid bladder and the vertical limiting devices are fixedly installed between the chained panel and the bottom plate. The chained panel is constructed based on the impedance mismatch principle and provided with a mechanical device. Mechanical vibration energy is dissipated twice by the chained panel and the vibration reduction fluid bladder, thereby greatly reducing influences of mechanical device operation on a hull structure. The present disclosure abandons a traditional base design of a continuous panel, is simple in structure and good in vibration reduction performance, and has good economy and wide application prospects.

公开(公告)号：US11940528B1

公开(公告)日：2024-03-26

申请号：US18383150

申请日：2023-10-24

Applicant: Harbin Engineering University

Inventor： Haichao Li ,  Jiawei Xu ,  Fuzhen Pang ,  Cong Gao ,  Yuhang Tang ,  Jiajun Zheng ,  Xueren Wang ,  Zhe Zhao ,  Xuhong Miao ,  Yuan Du

IPC: G01S15/00 ,  G06F30/20

CPC classification number: G01S15/006 ,  G06F30/20

Abstract: Disclosed are a method and system for evaluating sonar self-noise at a ship design stage. The method includes: building a ship structure full-scale geometric simulation model; acquiring loss factors and sonar transducer space outfitting acoustic absorption coefficient material parameters; acquiring mechanical excitation, hydrodynamic excitation, and propeller excitation; inputting the loss factors and the sonar transducer space outfitting acoustic absorption coefficient material parameters into an established statistical energy evaluation model, and applying a mechanical excitation to a face plate of foundation of the built ship structure full-scale geometric simulation model, applying a hydrodynamic excitation to the surface of a ship hull, and applying a propeller excitation to a stern shaft to perform calculation of sonar self-noise of a ship to obtain total spectral density level of the sonar self-noise; and evaluating spectral density level calculation results by index requirements. The method is applicable in risk evaluation of sonar self-noise indexes.