公开(公告)号：US11526645B2

公开(公告)日：2022-12-13

申请号：US16856016

申请日：2020-04-22

申请人： Sound Solutions International Co., Ltd.

发明人： Friedrich Reining

IPC分类号： H04R3/00 ,  G06F30/367 ,  H04R3/08 ,  H04R9/04 ,  H04R9/18 ,  H04R9/02 ,  H04R1/24 ,  G06F111/10 ,  G06F119/14

摘要： Method and electronic circuit for determining a scaling factor k for a driving force function of a model of an electrodynamic acoustic transducer having at least two voice coils. Input signal fed into the transducer and it's model cause electromotive forces. A shift for the driving force function is determined on the base of the ratios between the real electromotive forces and the modeled electromotive forces. Finally, the scaling factor k is determined on the basis of a deviation between the real electromotive forces and the modeled electromotive forces at time points where the real electromotive forces and the modeled electromotive forces each are equal. The invention moreover relates to an electronic circuit for performing the above steps, and to a transducer system with the electronic circuit and a connected transducer.

公开(公告)号：US11321503B2

公开(公告)日：2022-05-03

申请号：US17431433

申请日：2020-12-01

申请人： DALIAN UNIVERSITY OF TECHNOLOGY

发明人： Fei Han ,  Yongwei Wang ,  Gilles Lubineau

IPC分类号： G06F30/20 ,  G06F119/14 ,  G06F30/17

摘要： A method for predicting a structural failure by a strength-criterion-driven peridynamic model is provided. By building a peridynamic model driven by the strength-criterion of structural materials and then applying geometric and material parameters and working conditions of a structure, a life period from a deformation to a complete break of the structure is predicted. The method is of a high reliability, a wide application range, and a high calculation efficiency. The method simulates an initiation and a propagation of multiple cracks on complex structures under complex load conditions until the structure is destroyed.

公开(公告)号：US11168380B2

公开(公告)日：2021-11-09

申请号：US17058644

申请日：2020-07-09

申请人： UNIVERSITY OF SHANGHAI FOR SCIENCE AND TECHNOLOGY

发明人： Xi Lu ,  Hanguang Liu ,  Lei Tian ,  Hong Wang ,  Jiawei Huang

IPC分类号： G06F30/20 ,  G06F30/17 ,  C21D11/00 ,  G06F119/14

摘要： To solve the technical problem of the incapacity to perform a quantitative matching design of residual compressive stress in the process of prior structural cold working-residual compressive stress design, the invention provides a method of structural cold working-residual compressive stress distribution quantitative matching design, characterized by treating the fatigue strength of a mechanical structure and parts as a field, and matching a structural stress field and a fatigue strength field organically, to quantitatively match the residual compressive stress in conjunction with characteristics of the cold working process. The method specifically includes determination of the maximum stress amplitude and a gradient distribution thereof at a dangerous position of the structure, determination of an ideal fatigue strength distribution of the dangerous cross-section of the structure, determination of a fatigue strength field according to curves of end quenching tests for material and a requirement for heat treatment, determination of the limit of the residual compressive stress according to characteristics of the structural cold working process, and determination of an actual residual compressive stress distribution of the dangerous cross-section in conjunction with cold working and the fatigue strength distribution.