US 2021/0264074 A1Published application

Model generation method

AssigneeToyota Jidosha Kabushiki Kaisha

InventorSatoshi ITO

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Abstract

A static matrix model in a viscoelastic body is generated for each environmental temperature condition. A generalized Maxwell model is generated for each environmental temperature condition using a matrix of the static matrix model. A spring coefficient and a damper viscosity coefficient of a material test piece is identified as a function of a strain rate norm based on a measurement result of the material test piece using a temperature-time conversion rule. An average strain rate of a part is identified as a function of a displacement rate vector. A dynamic spring coefficient and a damper viscosity coefficient of the part are identified as a function of a component of the displacement rate vector. A generalized Maxwell model for analysis is generated by applying the dynamic spring coefficient and the damper viscosity coefficient identified as the function of the component of the displacement rate vector to the generalized Maxwell model.

Claims3

Dependent claims

A model generation method for generating a dynamic model that is a model for reproducing a dynamic response of a part including a member made of a viscoelastic body, the model generation method comprising:

a step of generating a static model in the viscoelastic body for each of environmental temperature conditions;
a step of generating a generalized Maxwell model for each of the environmental temperature conditions using the static model;
a step of identifying a spring coefficient and a damper viscosity coefficient of the viscoelastic body as a function of a strain rate norm based on a measurement result of a material test piece using a temperature-time conversion rule;
a step of identifying an average strain rate of the part as a function of a displacement rate vector;
a step of identifying a dynamic spring coefficient and the damper viscosity coefficient of the part as a function of a component of the displacement rate vector;
and
a step of generating a generalized Maxwell model for analysis by applying the dynamic spring coefficient and the damper viscosity coefficient identified as the function of the component of the displacement rate vector to the generalized Maxwell model.

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Facts

Application: 17/098,460Filed 16 Nov 2020
Priority: JP 2020-02735320 Feb 2020
Published: 26 Aug 2021
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

G06F 30/20
Computer-aided design [CAD]: design optimisation, verification or simulation
G06F 30/23
Design optimisation, verification or simulation: using finite element methods [FEM] or finite difference methods [FDM]
G06F 30/27
Design optimisation, verification or simulation: using machine learning, e.g. artificial intelligence, neural networks, support vector machines…
G06F 2111/10
Details relating to CAD techniques: numerical modelling

Family

US 11,615,224 B2Related patent
US 2021/0264074 A1This patent

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