Jfe Steel Corporation

Nec Corporation

Jfe Techno-Research Corporation

Takanobu Saito

Koichi Nakagawa

Yoshikiyo Tamai

Kazuhiko Higai

Kaoru Sato

Yoshimasa Funakawa

Kentaro Sato

Kunikazu Tomita

Tsuyoshi Shiozaki

Hiroshi Nakata

Eiji Maeda

Minoru Suwa

Takashi Iwama

Akihide Yoshitake

Yasuhiro Murao

Mitsuaki Uesugi

Tetsuo Yamamoto

A method for analyzing sensitivity of automotive body parts with respect to an automotive body performance of an automotive body including the automotive body parts, the method being executed by a computer and including: acquiring an automotive body model including the automotive body parts modelled with elements; setting: an objective condition related to an automotive body performance of the automotive body model; a constraint condition related to a volume of the automotive body model; and a loading condition to be imposed on the automotive body model; obtaining sensitivities of respective elements that satisfies the objective condition under the loading condition and the constraint condition; and calculating sensitivities of each of the automotive body parts based on the sensitivities of the respective elements.

Method and apparatus for analyzing sensitivity of automotive body parts and method for determining material property of automotive body parts

A vibration noise reduction analysis method for automotive panel parts acquires optimal distribution of beads to be provided in an automotive panel part to reduce noise caused by vibration of the panel part. The vibration noise reduction analysis method is executed by a computer, and includes: an automotive body analysis model acquiring step; an analysis condition setting step; a single-bead arranged area setting step; a bead parameter distribution acquiring step; an equivalent radiated power (ERP) reacquisition step; a bead parameter distribution acquisition step on a minimum ERP in bead-arranged area; and an optimal bead distribution determination step. The bead parameter distribution acquiring step includes: a bead parameter selection step; a bead parameter distribution analysis model generation step; and a bead parameter design variable distribution analysis step.

Vibration noise reduction analysis method and analyzer for automotive panel parts

An analysis method of optimizing vibration performance of a part of an automotive body, including: acquiring a maximum displacement of vibration of the part of the automotive body; acquiring a load required for applying a same displacement as the acquired maximum displacement, to the part of the automotive body; setting a design space by setting a part or member that supports the part of the automotive body as an optimization target; generating an optimization block model formed of three-dimensional elements in the set design space; generating an optimization analysis model by combining the generated optimization block model to the automotive body; and acquiring an optimal shape of the optimization block model by: applying the acquired load as a load condition; and performing optimization analysis for the optimization block model taking an inertial force that occurs in the part of the automotive body due to vibration into consideration.

Analysis method and apparatus for optimizing vibration performance of automotive body

An automotive body adhesive bonding position optimization analysis method of obtaining an optimum position at which a parts set is adhesive-bonded with a structural adhesive in combination with welding, the method including: disposing an adhesive element as the structural adhesive at a position on a body structure model as a candidate at which adhesive bonding is performed with the structural adhesive; setting an optimization analysis condition including a loading condition applied to the body structure model in optimization analysis, to the body structure model on which the adhesive element is disposed; and performing optimization analysis on the adhesive element as an optimization analysis object in the body structure model to which the optimization analysis condition is set so as to obtain a position of the adhesive element satisfying the optimization analysis condition as the position at which adhesive bonding is performed with the structural adhesive.

Automotive body adhesive bonding position optimization analysis method and optimization analysis device

A layered-composite-member shape optimization analysis method includes: setting, as a design space, an optimization target part of a structural body model of an automotive body; generating a layered block model in the set design space, the layered block model including layers, each layer being a three-dimensional element and having material properties different from each other; connecting the generated layered block model to the part of the structural body model of the automotive body; and inputting an analysis condition, performing optimization analysis on the layered block model as an optimization analysis target, and determining an optimum shape of the layered block model.

Layered-composite-member shape optimization analysis method and optimization analysis device

An automotive frame part that is an A-pillar-lower part, the A-pillar-lower part including: an outer panel having approximately a T-shape in planar view and a cross section intersecting a portion corresponding to a horizontal side and a vertical side of the T-shape is a hat-shaped cross section including a top portion, a side wall portion, and a flange portion; an inner panel being connected to the flange portion and forming a closed cross section with the outer panel; and plastic stiffening members that each have one end connected to an inner surface of the outer panel and another end connected to an inner surface of the inner panel, wherein the shape and the disposition of the stiffening members are set based on an analysis result from a shape optimization analysis method and each of the stiffening members has a columnar shape or a columnar shape with both end parts bulging.

Automotive frame part

A stiffening structure for an automotive door panel part according to the present invention includes a door outer panelmade of a metal sheet curved along a height direction, and in which a character lineis formed; and an impact beamdisposed at an inner surface side of the door outer panel. The stiffening structure improves tensile rigidity of the door outer panelby attaching a stiffening membermade of resin to the inner surface of the door outer panel. The stiffening memberincludes vertical bone portionsextending in a streak shape from the impact beamto the character linealong a curve of the door outer panel. The vertical bone portionsare arranged at a predetermined interval in a front-rear direction of the door outer panel, and outer surface of the vertical bone portionsis bonded to the inner surface of the door outer panel

Stiffening structure and stiffening method for automotive door panel part

The analysis method of optimizing a joint location of an automotive body of this disclosure is to determine an additional welded pointto be added to an automotive body frame model, including: an automobile model generation step Sto generate an automobile model by joining the automotive body frame modelto a chassis modelvia a joining portion; a driving analysis step Sto perform a driving analysis of the automobile model to acquire a load generated at the joining portion during driving; an optimization analysis model generation step Sto generate an optimization analysis modelby setting welding candidateson the automotive body frame model; an optimization analysis condition setting step Sto set optimization analysis conditions; and an optimization analysis step Sto apply the load generated at the joining portion to the optimization analysis modeto select an additional welded pointthat satisfies the optimization analysis conditions from the welding candidates

Analysis method and apparatus of optimizing joint location of automotive body

A method of setting metal sheet anisotropy information and sheet thickness information for an analysis model of a press-formed panel includes spreading the analysis model of the press-formed panel into a blank shape by analysis of reverse press-forming; acquiring sheet thickness information obtained by the analysis of reverse press-forming; based on a spread-blank-shape and a panel-taking blank shape, acquiring a reference direction of the spread-blank-shape; calculating an angle formed between the reference direction of the spread-blank-shape and each element in the spread-blank-shape, and setting the reference direction for each element of the analysis model of the press-formed panel based on the calculated angle; and setting the sheet thickness information acquired in the sheet-thickness-information acquiring step for each element of the analysis model of the press-formed panel.

Setting method of metal sheet anisotropy information and sheet thickness information for analysis model of press-formed panel, and stiffness analyzing method

A method for analysis of shape optimization includes: a design space setting step of setting a design space; an optimization block model generating step of generating an optimization block mode in the set design space; a connection processing step of connecting the generated optimization block model with a structural body model; a material property setting step of setting a material property for the optimization block model; a crashworthy optimum shaping condition setting step of setting a crashworthy optimum shaping condition for the optimization block model; a crashworthiness analysis condition setting step of setting a crashworthiness analysis condition for the structural body model; a three-dimensional element necessity calculation step of executing a crashworthiness analysis on the optimization block model, and calculating information related to necessity of each of three-dimensional elements of the optimization block model; and an optimum shape determining step of determining an optimum shape.

Method and apparatus for analysis of shape optimization

Aspects of the present invention include a welding-position optimization analyzing method for spot welding or continuous welding of components constituting a structure model formed of plane elements and/or three-dimensional elements. The method includes defining a to-be-analyzed portion including welding points or welding portions at which the plurality of components are welded; defining at least one of the welding points or at least one of the welding portions in the defined to-be-analyzed portion as a fixed welding point or a fixed welding portion; specifying welding prospects in the to-be-analyzed portion, the welding prospects being regarded as prospects for the welding points or the welding portions; defining an analytic condition applied to the to-be-analyzed portion; and analyzing and/or calculating an optimal welding point or an optimal welding portion that satisfies the analytic condition from among the welding prospects.

Analyzing method and apparatus for optimizing welding position of structure

A method for analysis of shape optimization includes: setting, as a design space, a portion to be optimized in a movable portion; generating, in the set design space, an optimization block model formed of three-dimensional elements and is to be subjected to analysis processing of optimization; connecting the generated optimization block model with a structural body model; setting a material property for the optimization block model; setting an optimization analysis condition for finding an optimum shape of the optimization block model; setting a multi-body dynamics analysis condition for performing multi-body dynamics analysis on the structural body model with which the optimization block model has been connected; and executing, based on the set optimization analysis condition and multi-body dynamics analysis condition, the multi-body dynamics analysis on the optimization block model and finding the optimum shape of the optimization block model.

Method and device for analysis of shape optimization

A springback-reduced part formed by performing a springback reduction on a press-formed part that is formed by a press forming of a blank sheet made of a metal sheet. The springback-reduced part is formed by setting each element of an analytic model of the press-formed part to a stressed state that causes a springback, performing an optimization analysis for shape to detect a portion of the press-formed part that highly contributes to the rigidity thereof, applying a rigidity improving means on a specific portion of the press-formed part on the basis of the detected portion, and performing the press forming.

Method for forming press-formed parts with reduced springback

A method for reducing springback in a press-formed part according to the present invention includes an analytic model forming step including forming an analytic model of the part from plane elements and/or solid elements; a stressed-state setting step including setting each of the elements of the analytic model to a stressed state that causes a springback; a rigidity-contributable-portion detecting step including performing an optimization analysis for shape on the analytic model with the elements set to the stressed state in the stressed-state setting step to detect a portion of the part that highly contributes to the rigidity of the part; and a rigidity improving step including applying a rigidity improving means to the part on a basis of the portion detected in the rigidity-contributable-portion detecting step.

Method for reducing springback and apparatus for analyzing springback of press formed parts

Shape optimization analyzing methods according to aspects of the present invention are analysis methods for optimizing part of a structure model using plane elements or three-dimensional elements. The methods include a design-space defining step of defining a portion of the structure model that is to be optimized as a design space, an optimization-block-model generating step of generating an optimization block model in the defined design space, the optimization block model being formed of three-dimensional elements and analyzed for optimization, a coupling step of coupling the generated optimization block model with the structure model, and an analyzing step of performing analysis in accordance with input of an analytic condition to calculate an optimal shape of the optimization block model.

Growing community of inventors

Tokyo, Japan

Takanobu Saito