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Structural Topology Optimization Using Numerical Derivatives

A topological and purposeful technology, applied in the field of computer-aided engineering design, which can solve problems such as expensive and excessive failure of structural topology optimization programs

Inactive Publication Date: 2016-03-23
LIVERMORE SOFTWARE TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As a result, structural topology optimization programs can fail or can be prohibitively expensive

Method used

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  • Structural Topology Optimization Using Numerical Derivatives
  • Structural Topology Optimization Using Numerical Derivatives
  • Structural Topology Optimization Using Numerical Derivatives

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Embodiment Construction

[0013] Reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments to the mutual exclusion of other embodiments. Furthermore, the term "optimal design" in this document is used to indicate a design that satisfies the design requirements (eg, goals, objectives, and constraints) in an iterative optimization design process. Furthermore, the terms "optimal configuration", "optimal design", "substantially improved design", "significantly improved design" and "final design" are used interchangeably throughout this document. Finally, the order of the blocks in a process flow diagram or schematic diagram representing one or more ...

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Abstract

Definition of a product's design domain along with design objective, at least one target design constraint, macro and field design variables are received in a computer system. Macro design variable is related to the product's design specification while field design variables control the material distribution within the design domain. Candidate design, represented by corresponding FEA model, based on the design domain is established. At least one variation of the candidate design is created by varying macro design variable. Corresponding design constraint of the candidate design and at least one variation are computed via FEA. Trend of the computed design constraints with respect to macro design variable is determined by multi-dimensional data fitting. Macro variables are updated according to the trend. New candidate design is created by computing field design variables using FEA results from the previous candidate design and design specifications including updated values of the macro design variables.

Description

technical field [0001] The present invention relates generally to computer-aided engineering design, and more particularly to an improved method and system for performing structural topology design optimization of products. Background technique [0002] Today, computer-aided engineering (CAE) has been used to support engineers in tasks (eg, analysis, simulation, design, manufacturing, etc.). In routine engineering design programs, CAE analysis (e.g., finite element analysis (FEA), finite difference analysis, meshless analysis, computational fluid dynamics (CFD) analysis, modeling for reducing noise vibration harshness (NVH) state analysis, etc.) have been used to evaluate the response (eg, stress, displacement, etc.). Using the car design as an example, a particular make or design of a car is analyzed using FEA to obtain the response due to certain loading conditions. Engineers will then try to improve the car design by modifying certain parameters or design variables (for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/15G06F30/23G06F2113/28Y02T90/00
Inventor 威廉·J·鲁
Owner LIVERMORE SOFTWARE TECH
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