Contact Us
Structure Integrated Simulation System for Seat Design Analysis J-SEATdesigner

J-SEATdesigner Functions

J-SEATdesigner Functions

Auto assembly of the sled analysis model Unify management of the simulation cases in the database

J-SEATdesigner can reduce the hours and efforts of engineers building a sled analysis model. Users can access the database that stores and manages a wide range of simulation cases along with the model files via the GUI. The database also stores the dummy-boundary condition combinations that satisfy the regulation/assessment. Users can use the data instead of inputting corresponding values individually. J-SEATdesigner’s auto assembly will build simulation models according to the simulation cases defined in the Assembly information and output the assembled model as an LS-DYNA input file. The capability of pre-simulation, including the H-point measurement simulation and seat simulation, is also implemented.


Database for models and assembly data

For automotive crash simulation, the dummy-boundary condition combinations that meet the assessments must be managed properly. J-SEATdesigner works in cooperation with an object-oriented relational database to manage the model and the associated data required for auto assembling. Users can access the database via the GUI to read models and add/remove/rename/save auto-assembly data.

  • Database access
    Database access
    J-SEATdesigner uses the object-oriented relational database to store the simulation models and the associated data individually. This structure allows the use of the simulation model and the associated data in a variety of combinations. Users can access the database via the GUI to read models and add/remove/rename/save auto-assembly data.
  • Addition of auto-assembly data
    Addition of auto-assembly data
    J-SEATdesigner can add the auto-assembly data to existing dummy models registered in the database. The auto-assembly data includes the +x / -x directions; the dummy type; part sets for contact definition; part sets for seatbelt refitting; and tree definition for positioning.
  • System construction appropriate for the current architecture
    System construction appropriate for the current architecture
    The database server can be built in either at a client workstation or as a standalone server. Additionally, the file server to save models can be isolated. The J-SEATdesigner is capable of adapting to the user’s current system architecture.

Model auto-assemble

Loading a pre-defined Assembly information will automatically perform the procedures for assembling models: reading models from the database, positioning each model, defining contacts/connections, positioning dummies and seats, seatbelt fitting, and Import pre-simulation results. The resulting assembled model can be output in an LS-DYNA input file format.

  • Loading models
    Loading models
    J-SEATdesigner automatically loads the model written in the Assembly information from the database.
  • Positioning and contact/connection definition
    Positioning and contact/connection definition
    Auto-positioning a dummy according to the Assembly information. Contact/connection conditions defined in the Assembly information are automatically applied.
  • Dummy positioning
    Dummy positioning
    Auto-recognize the target point saved in the Assembly information to position a dummy. All the users have to do is turn the positioning switch to "ON."
  • Positioning seats
    Positioning seats
    When the user inputs the seat angle and position and turns on the switch, J-SEATdesigner automatically performs seat positioning in accordance with the mechanism defined for the seat.
  • Seatbelt fitting
    Seatbelt fitting
    Turning the switch on after the seat/dummy positioning will automatically run the seatbelt fitting.
  • Import a seating simulation result
    Import a seating simulation result
    The seating simulation result can be imported from the database.

Interface for Assembly information creation

The Assembly information for the auto-assembling model is created via the J-SEATdesigner GUI, which was developed based on the GUI of ARUP software PRIMER. The J-SEATdesigner GUI consists of the project management, tool kit, and DB management panels. This easy setting and user-friendly GUI supports the design and simulation engineers who need to deal with various vehicle models, regulations/assessments, and simulation cases.

  • Project management panel
    Project management panel
    J-SEATdesigner's project management panel tree view allows users to understand the associated regulations, the test condition, and the necessity of pre-simulations for each simulation case at sight. Users can copy/remove/rename a simulation case, run an LS-DYNA simulation, and perform auto model assembling from this panel.
  • Auto-assemble a model meeting the required regulations and assessments.
    Auto-assemble a model meeting the required regulations and assessments.
    J-SEATdesigner can define dummy/boundary condition/control card according to the regulations/assessments specified from the corresponding management panels. Changing the regulation to use will automatically change the dummy/boundary condition/control card accordingly.
  • Simulation cases
    Simulation cases
    To create a new simulation case, go to the management panel and specify the conditions including connections, contacts, and positioning. Copying and modifying the current simulation case will make it easier to create a similar simulation case.

Building a model for pre-simulation

Automobile crash simulation might require simulation results performed prior to the crash simulation: H-point measuring and seating simulations. The J-SEATdesigner GUI supports the performing of such pre-simulations. Users can import the result of the pre-simulation via the J-SEATdesigner GUI and then proceed to building a model efficiently.

  • H-point measurement simulation
    H-point measurement simulation
    J-SEATdesigner includes the Arup H-Point manikin (HPM). The HPM supports the SAE, ECE, and Japanese safety standards. Users can run an LS-DYNA simulation with the auto-set HRM. The resulting H-Point coordinate and torso angle can be used in the positioning.
  • Seating simulation
    Seating simulation
    Switch a dummy to rigid and move it to H-point, to auto-create a simulation model. The database can store the parts of the seat foam or the flame that comprises deformable parts. Users can run a simulation on the ARUP software PRIMER or on LS-DYNA.
  • THUMS positioning
    THUMS positioning
    J-SEATdesigner uses the simulation based dummy positioning feature of the Arup software PRIMER to perform THUMS (FE human body model) positioning. The cable definition used to perform positioning is auto-set by J-SEATdesigner, and the users input the cable connection point and the drag force. Once the required settings are completed, generate the LS-DYNA input file and run a simulation to import the nodal coordinates from the simulation result.
  • * LS-DYNA license is separately required.

Supported platforms

  • ・Windows 10 (64-bit)
  • * J-SEATdesigner requires the ARUP software PRIMER license issued by JSOL.
  • * J-SEATdesinger requires the license of Oasys Ltd. software D3PLOT or LS-DYNA depending on the function.

Page Top

  • *Product names and service names are the trademarks or the registered trademarks of their proprietors.

Contact Us

Page Top

This website uses cookies to improve functionality and performance. If you continue browsing the site, you are giving implied consent to the use of cookies on this website. If you want to know more or refuse consent, read our Cookie Policy.