公开(公告)号：US20220035967A1

公开(公告)日：2022-02-03

申请号：US17349270

申请日：2021-06-16

Applicant: DALIAN UNIVERSITY OF TECHNOLOGY

Inventor： Shengfa WANG ,  Jiangbei HU ,  Xiaopeng ZHENG ,  Na LEI ,  Zhongxuan LUO

IPC: G06F30/20

Abstract: An efficient method for representation and optimization of porous structures belongs to the field of computer aided design. Firstly, a representation method of a multi-scale porous structure described by a function is provided. Based on the function representation, an optimization frame is designed. Then, an optimization problem model is established by taking structural energy minimization as a goal and taking a volume and a gradient as constraints. Finally, topological optimization is conducted firstly, and then geometric optimization is conducted. The topology and the thickness of the porous structure are optimized to obtain an optimization model filled with the porous structure. The present invention completely represents, analyzes, optimizes and stores the porous structure by functions, which greatly reduces the calculation complexity and greatly shortens the design and optimization period. Moreover, the present invention can provide an optimization model with strong structural hardness and stiffness under the volume constraint. The structure is suitable for frequently-used 3D printing manufacturing technologies. The internal structure does not need additional support in the printing process, which can save printing time and printing material.

公开(公告)号：US20220327258A1

公开(公告)日：2022-10-13

申请号：US17841306

申请日：2022-06-15

Applicant: DALIAN UNIVERSITY OF TECHNOLOGY

Inventor： Shengfa WANG ,  Jiangbei HU ,  Na LEI ,  Zhongxuan LUO

IPC: G06F30/17 ,  G06F30/23 ,  G06T17/20

Abstract: The present invention relates to an efficient design and optimization algorithm framework of multi-scale porous structures. Firstly, initialized parameters are input by the user to obtain an initial porous structure through the design module. Then, the structure and external physical conditions defined by the user are transmitted to the analysis module to conduct mechanical response analysis of the porous structure. Next, an objective function and constraint functions of the optimization module are defined according to application requirements, and gradient information obtained by the analysis module is input to drive the operation of the optimization module. Finally an optimal multi-scale porous structure is obtained. The present invention relies on a vectorization mode in computer programming, converts a loop problem into a memory storage problem, and benefits from the existing fast computer algorithms for solving a system of linear equations, thus accelerating the calculation process of the whole algorithm.