Water ingress test method for vehicle interior

Abstract

To provide a water ingress test method for a vehicle interior using a simulation that allows a particle model imitating water droplets to intrude into gaps between components.SOLUTION: Provided is a water ingress test method for a vehicle interior using a computer-executed simulation of water ingress into a vehicle interior unit including a plurality of components, the method comprising: a step of setting a gap amount between a plurality of CAD data associated with the plurality of components; a step of setting a particle size of water droplets to be smaller than the gap amount; and a step of executing a simulation of water ingress using water droplets with the set particle size, with respect to CAD data of the vehicle interior unit including the plurality of components with the set gap amount.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to a method for water damage testing of an internal unit of a vehicle cabin using a particle method. [Background technology]

[0002] Patent Document 1 discloses a method for efficiently and quantitatively evaluating the inclusion bounce characteristics of a tire when the tire passes over an inclusion such as a water film on a road surface. In this evaluation method, a tire model, a road surface model, and an inclusion model are created, the tire model is rolled on the road surface model on which the inclusion model is provided to scatter a micro model, the scattered micro model is projected onto a plane perpendicular to the surface of the road surface model, and the jump characteristics of the inclusion of the tire is evaluated using the projected image of the micro model projected onto the plane. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2011-252748 A Summary of the Invention [Problem to be solved by the invention]

[0004] It is assumed that a water damage test for a vehicle interior unit will be performed by simulation. The CAD data for the vehicle interior unit that will be subject to water damage in the simulation is composed of CAD data for multiple parts. In this case, if there are no gaps between the multiple parts shown in the CAD data, the particle model simulating water droplets will not enter the gaps between the parts, and there is a risk that an appropriate simulation will not be performed.

[0005] The present disclosure has been made in consideration of the above-mentioned problems, and aims to provide a vehicle interior water exposure test method using simulation that can penetrate a particle model simulating water droplets into gaps between components. [Means for solving the problem]

[0006] In order to solve the above problems, one aspect of the disclosed technology is a vehicle interior water exposure test method that uses a computer-executed simulation of water exposure to an interior unit including multiple parts, the method including the steps of: setting a gap amount between multiple CAD data corresponding to the multiple parts; setting the particle size of the water droplets to a value smaller than the gap amount; and performing a simulation of water exposure using water droplets with the particle size set for the CAD data of the interior unit including the multiple parts for which the gap amount has been set. Effect of the Invention

[0007] According to the vehicle interior water damage test method disclosed above, it is possible to appropriately simulate the intrusion of water droplets between components. [Brief description of the drawings]

[0008] [Figure 1] A flowchart showing a process of a vehicle interior water damage test method according to an embodiment of the present disclosure. [Diagram 2] A diagram showing an example of setting the tolerance coefficient [Diagram 3] A diagram showing an example of the relationship between part materials and tolerance coefficients [Figure 4] An example of setting particle size [Diagram 5] A diagram showing the simulation DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] <Embodiment> The vehicle interior water damage test method of the present disclosure can be used to simulate water droplets penetrating into gaps between multiple parts that make up the vehicle interior unit. Hereinafter, the present disclosure will be described using an example in which a speaker cover and an A-pillar are used as parts of the vehicle interior unit.

[0010] [control] 1 is a flowchart illustrating a process of a vehicle interior water damage test method according to an embodiment of the present disclosure. The vehicle interior water damage test method shown in FIG. 1 is executed by a computer (such as an ECU) mounted on a vehicle.

[0011] (Step S110) The computer loads CAD data of the vehicle interior unit that is subject to water damage in the simulation into the simulation software. The CAD data to be loaded is CAD data of each of the multiple parts that make up the vehicle interior unit. In this embodiment, CAD data 210 of the speaker lid and CAD data 220 of the A-pillar are loaded as the CAD data of the vehicle interior unit (see FIG. 2).

[0012] When the CAD data of the vehicle interior unit is read by the computer, the process proceeds to step S120.

[0013] (Step S120) The computer sets a tolerance coefficient that defines the gap between the multiple CAD data that have been read. FIG. 2 is a diagram showing an example of setting the tolerance coefficient (gap amount) between two parts. This tolerance coefficient (gap amount) is set to a value corresponding to the material of the parts, for example, based on a map 300 as shown in FIG. 3. In the map 300 of FIG. 3, for example, if a part is molded from a resin material, the tolerance coefficient (gap amount) of the part is set to "A." Typically, the computer reads physical property values ​​from the physical property information of the CAD data, and automatically sets a tolerance coefficient (gap amount) corresponding to the physical property value for each part.

[0014] The tolerance coefficient (gap amount) may be set so that the dimension of one of the two adjacent parts in the adjacent direction is small, or the dimensions of both of the two adjacent parts in the adjacent direction are set small. Also, the tolerance coefficient (gap amount) may be set small when the material of the parts is soft.

[0015] Once the tolerance coefficient (amount of clearance) between the parts has been set by the computer, the process proceeds to step S130.

[0016] (Step S130) The computer sets the particle size of the particle model simulating the water droplets used in the simulation. This particle size is set to a value smaller than the tolerance coefficient (gap amount) between the parts. More specifically, as shown in FIG. 4, the particle size, which is the diameter d of the particle model 400, is set to a value smaller than twice the tolerance coefficient (gap amount) (diameter d<tolerance coefficient (gap amount)×2).

[0017] Once the particle size of the particle model is set by the computer, the process proceeds to step S140.

[0018] (Step S140) The computer performs an analysis. In this analysis, a simulation is performed in which water droplets penetrate into the gaps of the vehicle interior unit, using the vehicle interior unit for which the tolerance coefficient (gap amount) is set in the above step S120 and the particle model for which the particle size is set in the above step S130. Figure 5 is a diagram showing an image of the simulation.

[0019] Once the analysis is completed by the computer, the process ends.

[0020] <Actions and Effects> As described above, according to the vehicle interior water damage test method according to an embodiment of the present disclosure, a tolerance level gap amount is set between multiple CAD data corresponding to multiple parts constituting a vehicle interior unit, and the size of a particle model simulating water droplets is set to a value smaller than the gap amount. Then, a simulation of water damage using water droplets with a set particle size is performed on the CAD data of the vehicle interior unit including the multiple parts with the set gap amount.

[0021] According to this method, the gaps between parts in an actual vehicle are reproduced, and then water splashing and water ingress can be performed on the vehicle interior unit using a particle model whose size is appropriately set based on the gaps, making it possible to appropriately simulate water droplets penetrating between parts. [Industrial Applicability]

[0022] The present disclosure can be used, for example, when simulating a condition in which an internal unit of a vehicle cabin is subjected to water. [Explanation of symbols]

[0023] CAD data for 210 and 220 parts 300 Maps 400 Particle Model

Claims

[Claim 1] A vehicle interior water damage test method using a computer-implemented simulation of water damage to a vehicle interior unit including a plurality of components, comprising: setting a gap amount between a plurality of CAD data corresponding to the plurality of parts; Setting a particle size of the water droplets to a value smaller than the gap amount; and executing a simulation of the water damage using the water droplets for which the particle size is set, for CAD data of the vehicle interior unit including the plurality of components for which the gap amount is set. Vehicle interior water damage test method.

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