Recombination of numerical analysis for impact simulation

Patent metadata

Field	Value
Publication number	US-2022253569-A1
Application number	US-201917612154-A
Country	US
Kind code	A1
Filing date	May 31, 2019
Priority date	May 31, 2019
Publication date	Aug 11, 2022
Grant date	—

Abstract

Computational numerical analysis for passenger seating assemblies can be performed by generating a combined computer numerical simulation based on two or more partial numerical simulations of different assemblies and/or virtual passengers or anthropomorphic test dummies (ATDs). The partial numerical simulations may be run for a common, nonzero period of time, after which first simulation data from the first numerical simulation and second simulation data from the second numerical simulation can be captured and used for generating the combined numerical simulation. The combined numerical simulation can simulate a collision between the different assemblies and/or virtual ATDs by assembling the first and second partial simulation data such that the modeled assemblies collide in the combined computer numerical simulation. Any suitable number of combined numerical simulations in a variety of specific variations may be regenerated using the first and second partial simulation data.

First claim

1 . A computer-implemented method of performing a computational analysis of an impact, the method comprising:
modeling, on a computing device, a first numerical simulation representative of a first seat in a passenger seating arrangement, wherein modeling the first numerical simulation comprises identifying interactions between first physical elements of the first seat; modeling a second numerical simulation representative of a second seat in the passenger seating arrangement and a virtual body comprising a virtual passenger or virtual anthropomorphic test dummy (ATD), and wherein modeling the second numerical simulation comprises identifying interactions between second physical elements of the second seat and/or the virtual body; independently running the first numerical simulation and running the second numerical simulation for a nonzero period of time; capturing first simulation data of the first numerical simulation after the nonzero period of time; capturing second simulation data of the second numerical simulation after the nonzero period of time; generating, from the first simulation data and the second simulation data, a combined numerical simulation representative of the first seat and the second sat, wherein the combined numerical simulation models:
(i) the first seat positioned in a first relative orientation and at a first predetermined distance with respect to the second seat, and
(ii) the second seat and the virtual body positioned aft of the first seat and moving forward toward the second seat,
simulating a collision of the first seat with the second seat and/or the virtual body by the combined numerical simulation by simulating collisions between one or more of the first physical elements and one or more of the second physical elements; and adjusting one or more of the first physical elements or second physical elements based on an output of the combined numerical simulation.

2 . (canceled)

3 . The method of claim 1 , wherein the nonzero period of time is greater than or equal to a first length of time required for the second seat to collide with an initial position of the first seat, but less than a second length of time required for the second a to collide with the first seat.

4 . The method of claim 1 , wherein the nonzero period of time corresponds to a length of time required for the second seat to collide with an initial position of the first seat.

5 . The method of any of claim 1 , wherein:
the first physical elements are associated with a first plurality of element identifiers; the second physical elements are associated with a second plurality of element identifiers; and the first plurality of element identifiers and the second plurality of element identifiers do not overlap.

6 . The method of claim 1 , wherein:
modifying at least one of a first plurality of element identifiers corresponding to the first physical elements, or a second plurality of element identifiers corresponding to the second physical elements, to prevent the first plurality of element identifiers and the second plurality of element identifiers from overlapping.

7 . The method of claim 1 , wherein an initial state of the combined numerical simulation is representative of the first seat and the second seat after the first seat and the second seat have undergone simulated acceleration but prior to collision between the first seat and second seat.

8 . The method of claim 1 , further comprising:
generating, based on the first simulation data and the second simulation data, a second combined numerical simulation representative of the first seat and the second seat, wherein the first seat and the second seat are positioned at a second predetermined distance with respect to each other that is different from the first predetermined distance.

9 . The method of claim 1 , further comprising:
generating, based on the first simulation data and the second simulation data, a second combined numerical simulation representative of the first seat and the second seat, wherein the first seat and the second seat are positioned in a second orientation that is different than the first relative orientation.

10 . The method of claim 1 , wherein:
the first simulation data comprises first position, orientation, and velocity data corresponding the first physical elements of the first seat; and the second simulation data comprises second position, orientation, and velocity data corresponding the second physical elements of the second seat.

11 . A method comprising:
selecting first numerical simulation data, the first numerical simulation data corresponding to a first numerical simulation of a first passenger seat in a passenger seating arrangement, the first passenger seat having undergone translation or deformation; selecting second numerical simulation data, the second numerical simulation data corresponding to (i) a second numerical simulation of a second passenger seat in the passenger seating arrangement and (ii) a virtual passenger or a virtual anthropomorphic test dummy (ATD) having undergone translation or deformation; modeling, on a computing device, a combined numerical simulation based on the first numerical simulation data and second numerical simulation data, the combined numerical simulation comprising a combined system of the first passenger seat, virtual passenger or virtual ATD, and the second passenger seat, wherein an initial condition of the combined numerical simulations comprises the combined system having undergone translation or deformation, and wherein the combined numerical simulation models:
(i) the first passenger seat positioned in a first relative orientation and at a first predetermined distance with respect to the second seat, and
(ii) the second passenger seat and virtual passenger or virtual ATD positioned aft of the first seat; and
adjusting, on the computing device, one or more physical elements corresponding to the first passenger seat or the second passenger seat.

12 . The method of claim 11 , further comprising simulating continued acceleration or deceleration of the combined system in the combined numerical simulation.

13 . The method of claim 11 , wherein the first numerical simulation data and the second numerical simulation data, respectively, comprise a first end-state of the first numerical simulation and a second end-state of the second numerical simulation resultant from a common acceleration over a common nonzero period of time.

14 . The method of claim 11 , wherein
the initial condition of the combined system in the combined numerical simulation represents the second passenger seat and virtual passenger or virtual ATD as not in contact with the first passenger seat.

15 . The method of claim 14 , wherein:
in the initial condition in the combined numerical simulation, the virtual passenger or virtual ATD is positioned within 5.0 cm, preferably within 2.5 cm, of a volume corresponding to an initial location of the first passenger seat.

16 . The method of claim 11 , further comprising:
modeling a second combined numerical simulation comprising a second combined system of the first passenger seat, virtual passenger or virtual ATD, and the second passenger seat, wherein the second combined system differs from the combined system by at least one of:
a distance between one or more of the first passenger seat, virtual passenger or virtual ATD, and the second passenger seat;
an orientation of one or more of the first passenger seat, virtual passenger or virtual ATD, and the second passenger seat; or
a configuration of one or more of the firs

Assignees

• Safran Seats Usa Llc

Inventors

• Tranier Romain
• Boast Daniel J
• Depierre Sebastien
• Masse Florent
• Dagois Mathieu

Classifications

• G06F2111/20

  Configuration CAD, e.g. designing by assembling or positioning modules selected from libraries of predesigned modules · CPC title

• G06F2113/28

  Fuselage, exterior or interior · CPC title

• G06F2111/10

  Numerical modelling · CPC title

• G06F30/15 Primary

  Vehicle, aircraft or watercraft design · CPC title

• G06F30/23 Primary

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