Analysis model creation assistance device and analysis model creation assistance method

Patent metadata

Field	Value
Publication number	US-11176283-B2
Application number	US-201716068737-A
Country	US
Kind code	B2
Filing date	Feb 14, 2017
Priority date	Mar 16, 2016
Publication date	Nov 16, 2021
Grant date	Nov 16, 2021

Abstract

A shape search unit (22) that repeats processes of comparing each shape element of current shape data (11a) or previous difference shape data (12a) with each shape element of existing shape data (11b), setting a set of shape elements that are similar to each other as a result of the comparison as common shape data (12b), on the other hand, and setting a set of shape elements that are not similar to each other as next difference shape data (12a), until the common shape data (12b) is not extracted from the difference shape data (12a), a common mesh extraction unit (23b) that searches for corresponding common mesh data (13b) from an existing model database (11x) using the common shape data (12b) as a search key are provided.

First claim

The invention claimed is:

1. An analysis model creation assistance device comprising:
an existing model database that associates analyzed existing shape data, which is computer-aided design (CAD) data with existing mesh data that is an analysis result of the existing shape data; and
a processor coupled to the existing model database, programmed to:
receive input of current shape data, which is CAD data,
repeat a process of comparing each shape element of the input current shape data with each shape element of the existing shape data, automatically determining and including a set of shape elements that are identical to each other as a result of the comparison as common shape data, determining a set of shape elements that are different from each other as difference shape data, automatically comparing each shape element of the previously determined difference shape data with each shape element of the existing shape data, determining and including a set of shape elements that are identical to each other as a result of the comparison as the common shape data, and determining a set of shape elements that are different from each other as a next difference shape data,
search for corresponding existing mesh data using the common shape data as a search key and extract common mesh data as a search result,
create difference mesh data based on the difference shape data,
dispose each common mesh data at a corresponding position of the current shape data and set the disposition result as disposition common mesh data, and
automatically combine the difference mesh data with the disposition common mesh data to create current mesh data corresponding to the input current shape data.

2. The analysis model creation assistance device according to claim 1 ,
wherein the processor is programmed to:
determine that the shape elements are identical when the lengths of line segments that are the shape elements are identical.

3. The analysis model creation assistance device according to claim 1 ,
wherein the processor is programmed to:
determine that the shape elements are identical when the areas of surfaces or a sum of the lengths of sides configuring the surfaces that are the shape elements are identical.

4. The analysis model creation assistance device according to claim 1 ,
wherein the processor is programmed to:
wherein, in a process of determining the next difference shape data from the previous difference shape data, when a plurality of candidates of the common shape data that are identical to the difference shape data or the current shape data are present, adopt the largest common shape data among the candidates.

5. An analysis model creation assistance method,
wherein an analysis model creation assistance device includes an existing model database, and a processor that executes a shape search unit, a common mesh extraction unit, and a mesh combination unit, the method comprising:
in the existing model database, analyzing existing shape data, which is computer-aided design (CAD) data and associating the analyzed existing shape data with existing mesh data that is an analysis result of the existing shape data;
receiving an input of current shape data, which is CAD data;
repeating a process of, by the shape search unit, automatically comparing each shape element of the input current shape data with each shape element of the existing shape data, determining and including a set of shape elements that are identical to each other as a result of the comparison as common shape data, determining a set of shape elements that are different to each other as difference shape data, automatically comparing each shape element of previous difference shape data with each shape element of the existing shape data, determining and including a set of shape elements that are identical to each other as a result of the comparison as the common shape data, and setting a set of shape elements that are different from each other as a next difference shape data;
searching, by the common mesh extraction unit, for corresponding existing mesh data using the common shape data as a search key and extract common mesh data as a search result;
creating difference mesh data based on the difference shape data; and
disposing each common mesh data at a corresponding position of the current shape data and set the disposition result as disposition common mesh data; and
automatically combining, by the mesh combination unit, the difference mesh data with the disposition common mesh data to create current mesh data corresponding to the input current shape data.

Assignees

• Hitachi Ltd

Inventors

• Onodera Makoto
• Hariya Masayuki
• Kongou Chikara
• Shintani Masaki
• He Qi

Classifications

• G06F30/00 Primary

  Computer-aided design [CAD] · CPC title

• G06F30/10 Primary

  Geometric CAD · CPC title

• G06F16/5854 Primary

  using shape and object relationship · CPC title

• G06F30/12

  characterised by design entry means specially adapted for CAD, e.g. graphical user interfaces [GUI] specially adapted for CAD · CPC title

• G06F30/23

  using finite element methods [FEM] or finite difference methods [FDM] · CPC title