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    Universal Wall Boundary Condition Treatment for K-Omega Turbulence Models
    11.
    发明申请
    Universal Wall Boundary Condition Treatment for K-Omega Turbulence Models 有权

    公开(公告)号：US20210173985A1

    公开(公告)日：2021-06-10

    申请号：US16707163

    申请日：2019-12-09

    Applicant: Dassault Systemes Simulia Corp.

    Inventor： Martin Sanchez-Rocha

    IPC: G06F30/28 ,  G06N5/02 ,  G06T17/20 ,  G06F17/13

    Abstract: Disclosed are techniques for simulating a physical process and for determining boundary conditions for a specific energy dissipation rate of a k-Omega turbulence fluid flow model of a fluid flow, by computing from a cell center distance and fluid flow variables a value of the specific energy dissipation rate for a turbulent flow that is valid for a viscous layer, buffer layer, and logarithmic region of a boundary defined in the simulation space. The value is determined by applying a buffer layer correction factor as a first boundary condition for the energy dissipation rate and by applying a viscous sublayer correction factor as a second boundary condition for the energy dissipation rate.

    Penalty function on design variables for designing variables for designing cost beneficially additive manufacturable structures
    12.
    发明授权
    Penalty function on design variables for designing variables for designing cost beneficially additive manufacturable structures 有权

    公开(公告)号：US10948896B2

    公开(公告)日：2021-03-16

    申请号：US14974414

    申请日：2015-12-18

    Applicant: Dassault Systemes Simulia Corp.

    Inventor： Claus Bech Wittendorf Pedersen

    IPC: G06F17/50 ,  G05B19/4099 ,  G06F30/00 ,  G06F30/20 ,  G06F119/18 ,  B33Y50/02

    Abstract: One goal in automated product designing of additive manufacturing is to obtain designs having overhangs without support structures if the criterion for overhangs is rigorously geometrical. In an embodiment of the present invention, designers can request automated optimization and design, using simulation and sensitivity-based optimization, of structures having overhangs in the print direction that do not need any support structures. In an embodiment, a method includes, at a processor, calculating model design responses and model sensitivities of a computer-aided engineering (CAE) model in a CAE system based on design variables of the CAE model for various design responses being either applied in objective or constraints. The method further includes optimizing values of the design variables. The method further includes calculating physical design variables by employing a penalty function. Additionally, the calculations can also be in conjunction with employing material interpolation schemes. The method further includes generating an optimized CAE model using the calculated physical design variables. The optimized CAE model is free or partly free of support structures. The method further includes printing the optimized CAE model being free or partly free of support structures.

    Scalable finite element simulation of additive manufacturing
    13.
    发明授权
    Scalable finite element simulation of additive manufacturing 审中-公开

    公开(公告)号：US10671777B2

    公开(公告)日：2020-06-02

    申请号：US15597473

    申请日：2017-05-17

    Applicant: Dassault Systemes Simulia Corp.

    Inventor： Victor George Oancea ,  Juan Antonio Hurtado Ortiz ,  Bruce Engelmann ,  William John Grimes

    IPC: G06F30/23 ,  B33Y50/00 ,  G06F111/10

    Abstract: Methods and systems for providing accurate, scalable, and predictive 3D printing simulations using numerical methods for part-level simulations. Complex parts can be discretized into finite elements using independent and arbitrary meshing. The real additive manufacturing tooling path and printing time of a printing machine are simulated and applied to the mesh of finite elements using an intersection module that combines the finite element mesh with the tool path information of the printing machine in a geometric sense. This allows for localized heating effects to be simulated very accurately, and for cooling assessments to be precisely computed given the intersection module's computation of partial facets and volumes of the finite elements at any given time in the printing simulation.

    Optimal pressure-projection method for incompressible transient and steady-state navier-stokes equations
    14.
    发明授权
    Optimal pressure-projection method for incompressible transient and steady-state navier-stokes equations 有权

    公开(公告)号：US10599879B2

    公开(公告)日：2020-03-24

    申请号：US15185707

    申请日：2016-06-17

    Applicant: Dassault Systemes Simulia Corp.

    Inventor： Martin Sanchez Rocha ,  Blair Perot

    IPC: G06F17/50 ,  G06F30/20 ,  G06F30/23 ,  G06F111/10

    Abstract: Embodiments of the present invention simulate a real-world system by first generating a time dependent system of equations that represents the real-world system where the time dependent system of equations has a defined constraint. Next, the constraint is de-coupled from the time-dependent system of equations using a matrix representing an approximation of physics of the real-world system, the de-coupling generating a first system of equations representing the constraint and a second system of equations representing physics of the real-world system. In turn, the generated first and second systems of equations are solved and the real-world system is automatically simulated by generating a simulation using results from solving the first and second systems of equations.

    Methods and systems for inverting a simulation process to validate a product design
    15.
    发明授权
    Methods and systems for inverting a simulation process to validate a product design 有权

    公开(公告)号：US10394230B2

    公开(公告)日：2019-08-27

    申请号：US15386370

    申请日：2016-12-21

    Applicant: Dassault Systemes Simulia Corp.

    Inventor： Gerry Pollock ,  Jonathan Paul Wiening

    IPC: G05B17/00 ,  G05B19/418 ,  G06F17/50

    Abstract: Embodiments of the present invention relieve the burden on a product designer to setup simulations to validate a product design. These embodiments are directed to computer methods and systems for inverting a simulation process to validate a product design. The methods and systems configure a simulator with analysis methods. The methods and systems then provide product design parameters (operating environment conditions and design targets) that define scenarios likely experienced by a product in terms familiar to the product designer. The methods and systems, via the simulator, automatically determine simulations for validating the product design based on the provided product design parameters. To do so, the methods and systems map each of the design parameters to one or more analysis types, which are used by the simulator to select a sequence of analysis methods to define the simulations. The methods and systems execute the simulations to validate the product design.

    Effectively solving structural dynamics problems with modal damping in physical coordinates
    18.
    发明授权
    Effectively solving structural dynamics problems with modal damping in physical coordinates 有权

    公开(公告)号：US10061878B2

    公开(公告)日：2018-08-28

    申请号：US14978629

    申请日：2015-12-22

    Applicant: Dassault Systemes Simulia Corp.

    Inventor： Pavel A. Bouzinov ,  Mikhail Belyi

    IPC: G06F17/10 ,  G06F17/50 ,  G06F17/11

    CPC classification number: G06F17/5018 ,  G06F17/11 ,  G06F2217/16

    Abstract: Embodiments provide methods and systems for modeling mechanical features of a structural dynamic system. A method according to an embodiment provides, in computer memory, a finite element model representing a structural dynamic system. Next, in a processor coupled to the computer memory, a system of equations with a first term representing a linear combination of a mass, a stiffness, and a damping of the finite element model and a second term representing modal damping is solved. According to such an embodiment, the system of equations is solved using the Sherman-Morrison-Woodbury formula or a preconditioned iterative method. In turn, an improved 3D model of a real world object based on the finite element model is formed utilizing results of the solved system of equations with the finite element model and modal damping to model mechanical features of the represented structural dynamic system.

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