Method for measuring deformation of vehicle body in collision analysis of vehicle and program for measuring deformation of vehicle body

Abstract

The method for measuring the amount of vehicle body deformation in the collision analysis of the present invention obtains a collision analysis model (1) of the vehicle (S1), performs a collision analysis of the collision analysis model (1) (S3), sets a measurement point for the amount of vehicle body deformation and three reference points for measuring the amount of vehicle body deformation in parts of the vehicle body that have no deformation or slight deformation (S5), obtains the coordinates of the measurement point and the coordinates of the three reference points at the beginning of the collision (S7), obtains the coordinates of the measurement point and the coordinates of the three reference points after the collision (S9), calculates the distance between the three reference points and the measurement point at the beginning of the collision (S11), uses the distance at the beginning of the collision to obtain the coordinates of the measurement point before the deformation of the vehicle body in the collision analysis model (1) after the collision (S13), and uses the coordinates of the measurement point before and after the deformation of the vehicle body to measure the amount of vehicle body deformation (S15).

Description

Technical Field

[0001] This invention relates to a method and procedure for measuring the amount of automotive body deformation in crashworthiness analysis of automobiles. Background Technology

[0002] In recent years, especially in the automotive industry, environmental concerns have led to a growing push for weight reduction in automotive bodies. As a result, CAE (computer-aided engineering analysis) has become an indispensable technique in body design. CAE analysis, including rigidity analysis, collision analysis, and vibration analysis, significantly contributes to improving body performance.

[0003] To improve crash performance through CAE analysis, for example, Non-Patent Document 1 discloses a technique for determining the plastic deformation property of a rudder frame during a frontal impact of a light truck through crash simulation.

[0004] Existing technical documents

[0005] Non-patent literature

[0006] Non-patent literature 1: Arita and 3 others, “Improvement of Accuracy for Crash Worthiness Simulation of Frame of Pickup Truck”, Transactions of Society of Automotive Engineers of Japan, Vol.46, No.6, November 2015. Summary of the Invention

[0007] The technical problem that the invention aims to solve

[0008] However, the technology disclosed in Non-Patent Document 1 only analyzes the collision of the trapezoidal frame, which is a component of the car body, rather than the entire car. Therefore, it is difficult to fully reproduce the deformation of the car body during a collision.

[0009] And, as Figure 10 As shown, even when using collision analysis model 1, which takes the entire car as the analysis object, to perform a side impact analysis with the colliding body 11, in addition to the deformation of the car body 3, the collision analysis model 1 as a whole also undergoes parallel movement and rotational movement. Therefore, as Figure 10 As shown in (c), in addition to the body deformation of the vehicle body 3 caused by the collision, there are also displacements that occur along with the parallel and rotational movements of the entire crashworthiness analysis model 1. Therefore, in order to evaluate the body deformation caused by the collision analysis of the crash analysis model 1, which is modeled as a whole vehicle, it is desirable to have a technique that excludes the displacements caused by the parallel and rotational movements of the crash analysis model 1.

[0010] The present invention was made in view of the above-mentioned problems, and its purpose is to provide a method and procedure for measuring the amount of vehicle body deformation in collision analysis of automobiles. In collision analysis using a collision analysis model of an automobile, the method can measure the amount of vehicle body deformation excluding the amount of movement caused by parallel movement and rotational movement resulting from the collision of the collision analysis model.

[0011] Technical solutions for solving technical problems

[0012] The inventors conducted in-depth research on the aforementioned problems, focusing on "the existence of parts that do not deform or deform very little due to a collision." Furthermore, they conceived of using these parts to exclude the amount of parallel and rotational movement of the vehicle caused by a collision, thereby measuring the amount of vehicle body deformation. This invention is based on the above research and specifically comprises the following solution.

[0013] The first embodiment of the present invention provides a method for measuring vehicle body deformation in a collision analysis of a car. This method measures the deformation of the vehicle body caused by a collision during the collision analysis, and involves a computer performing the following steps: a collision analysis model acquisition step, which acquires a collision analysis model of the car; a collision analysis step, which performs a collision analysis on the collision analysis model; and a body deformation measurement point and reference point setting step, which sets measurement points for measuring body deformation in the collision analysis model and three reference points in the collision analysis model located at areas of the vehicle body with no deformation or minimal deformation. The steps include: obtaining the coordinates of the measurement point and the reference point at the start of the collision, which involves obtaining the coordinates of the measurement point and the three reference points in the collision analysis model at the start of the collision; obtaining the coordinates of the measurement point and the reference point after the collision, which involves obtaining the coordinates of the measurement point and the three reference points after the collision based on the results of the collision analysis and for the collision analysis model after a specified time elapsed since the start of the collision; calculating the distance between the reference point and the measurement point at the start of the collision, which involves using the coordinates of the measurement point and the three reference points in the collision analysis model at the start of the collision to calculate the distance between the three reference points and the measurement point at the start of the collision; obtaining the coordinates of the measurement point before vehicle body deformation, which involves obtaining the coordinates of the position in the collision analysis model after the collision that satisfies the same distance relationship as the distance from each of the three reference points at the start of the collision as the coordinates of the measurement point before vehicle body deformation in the collision analysis model after the collision; and measuring the amount of vehicle body deformation, which involves using the coordinates of the measurement point before vehicle body deformation and the coordinates of the measurement point after the collision obtained for the collision analysis model after the collision to measure the amount of vehicle body deformation at the measurement point.

[0014] The second embodiment of the present invention provides a method for measuring vehicle body deformation in a collision analysis of a car. This method measures the deformation of the vehicle body caused by a collision during the collision analysis, and involves a computer performing the following steps: a collision analysis model acquisition step, which acquires a collision analysis model of the car; a collision analysis step, which performs a collision analysis on the collision analysis model; a body deformation measurement point and reference point setting step, which sets measurement points for measuring body deformation in the collision analysis model and three reference points in the collision analysis model at locations where the body body has no deformation or only minor deformation; a step for obtaining measurement point coordinates and reference point coordinates at the start of the collision, which obtains the coordinates of the measurement points and the three reference points in the collision analysis model at the start of the collision; and a step for obtaining measurement point coordinates and reference point coordinates after the collision, which, based on the results of the collision analysis, measures the deformation of the vehicle body after a predetermined time elapsed since the start of the collision. The analysis model obtains the coordinates of the measurement point and the three reference points after the collision. The step of calculating the distance between the reference point and the measurement point after the collision uses the coordinates of the measurement point and the three reference points in the collision analysis model after the collision to calculate the post-collision distance between the three reference points and the measurement point. The step of obtaining the coordinates of the measurement point after vehicle deformation uses the coordinates of the position in the collision analysis model at the start of the collision that satisfies the same distance relationship as the post-collision distance from each of the three reference points as the coordinates of the measurement point after vehicle deformation caused by the collision in the collision analysis model at the start of the collision. The step of measuring the vehicle deformation amount uses the coordinates of the measurement point after vehicle deformation obtained from the collision analysis model at the start of the collision and the coordinates of the measurement point at the start of the collision to measure the vehicle deformation amount at the measurement point.

[0015] The vehicle body deformation measurement program in the first embodiment of the present invention enables a computer to measure the deformation of the vehicle body caused by a collision in a collision analysis. The computer executes the following steps: a collision analysis model acquisition step, which acquires a collision analysis model of the vehicle; a collision analysis step, which performs a collision analysis on the collision analysis model; a vehicle body deformation measurement point and reference point setting step, which sets measurement points for measuring the vehicle body deformation in the collision analysis model and three reference points in the collision analysis model at locations where the vehicle body has no deformation or minimal deformation; a collision start-point measurement point coordinate and reference point coordinate acquisition step, which acquires the coordinates of the measurement points and the three reference points in the collision analysis model at the start of the collision; and a post-collision measurement point coordinate and reference point coordinate acquisition step, which, based on the results of the collision analysis, determines the coordinates of the measurement points and the three reference points for collisions occurring after a predetermined time elapsed since the start of the collision. The subsequent collision analysis model obtains the coordinates of the measurement point and the coordinates of the three reference points after the collision; the step of calculating the distance between the reference point and the measurement point at the start of the collision uses the coordinates of the measurement point and the coordinates of the three reference points in the collision analysis model at the start of the collision to calculate the distance between the measurement point and the three reference points at the start of the collision for each of the three reference points; the step of obtaining the coordinates of the measurement point before vehicle deformation obtains the coordinates of the position in the collision analysis model after the collision that satisfies the same distance relationship as the distance from each of the three reference points at the start of the collision as the coordinates of the measurement point before vehicle deformation in the collision analysis model after the collision; the step of measuring the amount of vehicle deformation uses the coordinates of the measurement point before vehicle deformation obtained for the collision analysis model after the collision and the coordinates of the measurement point after the collision to measure the amount of vehicle deformation at the measurement point.

[0016] The vehicle body deformation measurement program in the second embodiment of the present invention enables a computer to measure the deformation of the vehicle body caused by a collision during a collision analysis. The computer executes the following steps: a collision analysis model acquisition step, which acquires a collision analysis model of the vehicle; a collision analysis step, which performs a collision analysis on the collision analysis model; a vehicle body deformation measurement point and reference point setting step, which sets measurement points for measuring the vehicle body deformation in the collision analysis model and three reference points in the collision analysis model at locations where the vehicle body has no deformation or only minor deformation; a collision start-point measurement point coordinate and reference point coordinate acquisition step, which acquires the coordinates of the measurement points and the three reference points in the collision analysis model at the start of the collision; and a post-collision measurement point coordinate and reference point coordinate acquisition step, which, based on the results of the collision analysis, determines the post-collision measurement point coordinates and reference point coordinates after a predetermined time elapsed since the start of the collision. The collision analysis model is described above, and the coordinates of the measurement point and the three reference points after the collision are obtained respectively. The step of calculating the distance between the reference point and the measurement point after the collision uses the coordinates of the measurement point and the three reference points in the collision analysis model after the collision to calculate the post-collision distance between the three reference points and the measurement point respectively. The step of obtaining the coordinates of the measurement point after vehicle deformation uses the coordinates of the position in the collision analysis model at the start of the collision that satisfies the same distance relationship as the post-collision distance from each of the three reference points as the coordinates of the measurement point after vehicle deformation caused by the collision in the collision analysis model at the start of the collision. The step of measuring the vehicle deformation amount uses the coordinates of the measurement point after vehicle deformation obtained from the collision analysis model at the start of the collision and the coordinates of the measurement point at the start of the collision to measure the vehicle deformation amount at the measurement point.

[0017] Beneficial effects

[0018] According to the present invention, the parallel and rotational displacement of the vehicle body as a whole caused by a collision can be excluded, and the deformation of the vehicle body at the measurement point for measuring the deformation of the vehicle body can be measured. Therefore, the deformation of the vehicle body caused by a collision can be calculated with high precision, thus enabling an understanding of the vehicle body deformation phenomenon caused by a collision, and achieving improvements in the collision performance and weight reduction of automobiles. Attached Figure Description

[0019] Figure 1 This is a flowchart illustrating the method for measuring vehicle body deformation in collision analysis according to Embodiment 1 of the present invention.

[0020] Figure 2 This diagram illustrates the collision analysis of the collision analysis model used as the object in Embodiments 1 and 2 of the present invention.

[0021] Figure 3 This diagram illustrates the measurement points set on the floor panel of the collision analysis model in Embodiments 1, 2, and other embodiments of the present invention.

[0022] Figure 4 This diagram illustrates the reference points set in the collision analysis model for Embodiments 1, 2, and in the embodiments of the present invention.

[0023] Figure 5 This diagram illustrates the steps for determining the vehicle body deformation in Embodiment 1 of the present invention.

[0024] Figure 6 The figure illustrates an example of a position in the collision analysis model obtained in Embodiment 1 of the present invention where the distances between the measured point and the three reference points at the start of the collision satisfy the same distance relationship as those at the start of the collision. ((a) Three spheres centered on the three reference points, (b) The intersection of the three spheres).

[0025] Figure 7 This is a flowchart illustrating the process of measuring the body deformation in the collision analysis of a car according to Embodiment 2 of the present invention.

[0026] Figure 8 This diagram illustrates the steps for determining the vehicle body deformation in Embodiment 2 of the present invention.

[0027] Figure 9 The figure illustrates an example of a location in Embodiment 2 of the present invention where the distances between the collision analysis model at the start of the collision and the distances between the measured point and the three reference points after the collision satisfy the same distance relationship. ((a) Three spheres centered on the three reference points, (b) The intersection of the three spheres).

[0028] Figure 10 This diagram illustrates the problems encountered in collision analysis using a collision analysis model. Detailed Implementation

[0029] Before describing the method and procedure for measuring vehicle body deformation in the vehicle collision analysis of Embodiments 1 and 2 of the present invention, the collision analysis model used as the analysis object in the collision analysis of Embodiments 1 and 2 of the present invention will be described.

[0030] Collision Analysis Model

[0031] In embodiments 1 and 2 of this invention, the collision analysis model 1 is used as the object. Figure 2As an example, the model includes a body 3, which is modeled using elements (shell elements and / or solid elements) and nodes. Furthermore, the body 3 is composed of a floor 5, which is modeled using elements and nodes. Figure 3 It consists of multiple body parts such as )

[0032] [Implementation Method 1]

[0033] Next, the method and procedure for measuring the vehicle body deformation in the vehicle collision analysis of Embodiment 1 of the present invention will be described below.

[0034] <Method for Measuring Vehicle Body Deformation>

[0035] The method for measuring vehicle body deformation in vehicle collision analysis according to Embodiment 1 of the present invention (hereinafter referred to as the "vehicle body deformation measurement method") is a method for measuring the amount of vehicle body deformation caused by a collision in vehicle collision analysis, such as... Figure 1 As shown, the method for measuring vehicle body deformation includes steps S1 (obtaining the collision analysis model), S3 (collision analysis), S5 (setting the vehicle body deformation measurement points and reference points), S7 (obtaining the coordinates of the measurement points and reference points at the start of the collision), S9 (obtaining the coordinates of the measurement points and reference points after the collision), S11 (calculating the distance between the reference point and the measurement point at the start of the collision), S13 (obtaining the coordinates of the measurement points before vehicle body deformation), and S15 (measuring the vehicle body deformation). The computer performs these steps. The following is a description of each step.

[0036] Steps for Obtaining a Collision Analysis Model

[0037] The collision analysis model acquisition step S1 involves acquiring the vehicle's collision analysis model. In Embodiment 1 of the present invention, as described above, the collision analysis model is obtained... Figure 2 The collision analysis model is shown as an example in (a).

[0038] Collision Analysis Steps

[0039] The collision analysis step S3 performs the collision analysis of the collision analysis model obtained in the collision analysis model acquisition step S1.

[0040] In Embodiment 1 of the present invention, the collision analysis step S3 is as follows: Figure 2 As shown in one example, a collision analysis is performed on the left side of the collision analysis model 1 when the collision object 11 collides with the left side of the collision analysis model 1 in the width direction of the vehicle body. Therefore, in this collision analysis, the collision analysis conditions such as the position, direction, and speed of the collision object 11 are appropriately set.

[0041] Procedures for Setting Measurement Points and Reference Points for Vehicle Body Deformation

[0042] Step S5 sets the measurement points and reference points for measuring the deformation of the vehicle body in the collision analysis model and three reference points set in the parts of the vehicle body with less deformation.

[0043] In embodiment 1 of the present invention, as follows Figure 3 As shown, in step S5, the measurement points P1 to P8 are set on the base plate 5, which is part of the body 3 constituting the collision analysis model 1, to measure the deformation. Additionally, as... Figure 4 As shown in (c), in step S5, three reference points Q1 to Q3 are set on the right side face 3a of the collision analysis model 1 to measure the deformation of the vehicle body.

[0044] In the collision analysis model, the parts of the vehicle body that have no deformation or only minor deformation, for which three reference points are set, can be designated as parts with no strain or only minor strain in the collision analysis model, based on the results of the collision analysis in step S3. In Embodiment 1 of this invention, as described above... Figure 2 As shown, the collision analysis is taken as the object of the side collision of the collider 11 to the left side of the collision analysis model 1, therefore, as Figure 4 As shown in (a) and (b), three reference points Q1 to Q3 are set on the right side 3a of the vehicle body deformation in the collision analysis model 1 where the strain is sufficiently small. It should be noted that the strain value used as the standard for setting the reference points can be set to less than 1% of the strain.

[0045] Furthermore, in the collision analysis step S3, in order to calculate the coordinates of the nodes in the collision analysis model, the body deformation measurement point and reference point setting step S5 can set the measurement point and three reference points at the location of the nodes in the collision analysis model.

[0046] In addition, the step S5, which sets the body deformation measurement points and reference points, can also be performed before the collision analysis step S3.

[0047] Steps for obtaining the coordinates of the measurement point and the reference point at the start of the collision

[0048] Step S7: Obtain the coordinates of the measured point and the coordinates of the reference point in the collision analysis model at the start of the collision.

[0049] In Embodiment 1 of the present invention, the measurement points P1 to P8 set on the base plate 5 of the collision analysis model 1 are obtained. Figure 3 The coordinates at the start of the collision and the reference points Q1 to Q3 set on the right side face 3a of the collision analysis model 1. Figure 4The coordinates at the start of the collision (c).

[0050] It should be noted that, in step S5 of setting the vehicle body deformation measurement points and reference points, if the nodes of the collision analysis model are set as measurement points and three reference points, the coordinates of each node set can be obtained.

[0051] Furthermore, step S7, which involves determining the coordinates of the point of origin and the reference point at the start of the collision, can also be performed before step S3, which is the collision analysis step.

[0052] Steps for obtaining the coordinates of the measured point and the reference point after the collision

[0053] Step S9, which obtains the coordinates of the measured point and the reference point after the collision, is based on the results of the collision analysis in step S3. For the collision analysis model after a specified time has elapsed since the start of the collision, the coordinates of the measured point and the coordinates of the three reference points after the collision are obtained.

[0054] In Embodiment 1 of the present invention, the coordinates of each measurement point P1 to P8 and each reference point Q1 to Q3 in the colliding body 11 and the collision analysis model 1 after the collision are obtained.

[0055] Steps for calculating the distance between reference points and measurement points at the start of a collision

[0056] Step S11, which calculates the distance between the reference point and the measurement point at the start of the collision, uses the coordinates of the measurement point and the reference point obtained in step S7 to calculate the distance between the reference point and the measurement point at the start of the collision for each of the three reference points.

[0057] In embodiment 1 of the present invention, as follows Figure 5 As shown in (a), the distances L1, L2, and L3 between each reference point Q1, Q2, and Q3 and the measurement point P at the start of the collision are calculated using the coordinates of the measurement point P in the collision analysis model 1 at the start of the collision.

[0058] Furthermore, in Embodiment 1 of the present invention, as described above, eight measurement points P1 to P8 are set on the base plate 5. Therefore, the collision start distances L1, L2, and L3 between each measurement point P1 to P8 and the reference points Q1 to Q3 are calculated respectively.

[0059] Steps for obtaining coordinates of measurement points before vehicle body deformation

[0060] Step S13: Obtain the coordinates of the measurement points before vehicle body deformation in the post-collision collision analysis model. The coordinates of the positions that satisfy the same distance relationship with the three reference points at the start of the collision are used as the coordinates of the measurement points before vehicle body deformation in the post-collision collision analysis model.

[0061] In embodiment 1 of the present invention, as follows Figure 5 As shown, based on the initial collision distances L1, L2, and L3 between the measurement point P and the reference points Q1, Q2, and Q3, the coordinates of the measurement point R before vehicle deformation in the collision analysis model 1 after the collision are obtained. Additionally, as an example... Figure 6 As shown, the coordinates of the measurement point R before the vehicle body deformation can be obtained through the following steps.

[0062] First, such as Figure 6 As shown in (a), find the intersection line T between the spherical surface S1 centered at the reference point Q1 located after the collision and with a radius L1 at the start of the collision, and the spherical surface S2 centered at the reference point Q2 located after the collision and with a radius L2 at the start of the collision. 12 .

[0063] Next, as Figure 6 As shown in (a), the sphere S3, centered at the reference point Q3 located after the collision and with a radius equal to the distance L3 at the start of the collision, intersects the line T. 12 The coordinates of the intersection point C are used as the coordinates of the measurement point R before the vehicle body deformation.

[0064] The coordinates of the measurement point R before the vehicle body deformation are obtained in this way, which are equivalent to the coordinates of the measurement point P in the collision analysis model 1, where the vehicle body moves parallel and rotates without deformation after the collision.

[0065] It should be noted that, as Figure 6 As shown in (b), there exists a point on the intersection of the sphere S3 and the line T. 12 There are two intersection points C1 and C2. In this case, one of the two intersection points C1 and C2 that obviously does not exist on the collision analysis model 1 (e.g., intersection point C2) is excluded, and the coordinates of the other intersection point (e.g., intersection point C1) are obtained as the coordinates of the measurement point R before the vehicle body deformation.

[0066] Furthermore, in Embodiment 1 of the present invention, as Figure 3 As shown, measurement points P1 to P8 are set. Therefore, in step S13, the coordinates of the measurement points before the vehicle body deformation are obtained for measurement points P1 to P8 respectively, and the measurement points R1 to R8 before the vehicle body deformation are obtained.

[0067] Procedure for Measuring Vehicle Body Deformation

[0068] Step S15, which measures the amount of vehicle body deformation, uses the coordinates of the measurement points before and after vehicle body deformation obtained from the collision analysis model after the collision to measure the amount of vehicle body deformation at the measurement points.

[0069] In embodiment 1 of the present invention, as follows Figure 5 As shown in (b), for measurement points P (P1~P8), the coordinates of the measurement points R (R1~R8) before vehicle deformation in the post-collision collision analysis model 1 obtained in step S13 of obtaining the coordinates of the measurement points before vehicle deformation and the post-collision collision analysis model 1 obtained in step S9 of obtaining the coordinates of the measurement points and the reference points after the collision are used. Figure 2 The coordinates of the measurement points P (P1~P8) after the vehicle body deformation in (b) are used to measure the amount of vehicle body deformation at each measurement point P1~P8.

[0070] According to the vehicle body deformation measurement method of Embodiment 1 of the present invention, in a collision analysis using a vehicle collision analysis model, three reference points are set at locations with minimal vehicle body deformation. The coordinates of the measurement points before deformation in the collision analysis model after the collision are determined using the distance relationship between these three reference points at the start of the collision and the measurement points used to measure the vehicle body deformation. This eliminates the parallel and rotational displacement of the entire collision analysis model caused by the collision, allowing for the measurement of the vehicle body deformation at the measurement points. Therefore, the vehicle body deformation caused by the collision can be calculated with high precision, enabling an understanding of the vehicle body deformation phenomenon caused by the collision and achieving improved collision performance and weight reduction of the vehicle body.

[0071] <Procedure for Measuring Vehicle Body Deformation>

[0072] It should be noted that the vehicle body deformation measurement method of Embodiment 1 of the present invention can be configured as a vehicle body deformation measurement program (hereinafter referred to as "vehicle body deformation measurement program") in vehicle collision analysis, which enables a computer to measure the vehicle body deformation caused by the collision in the vehicle collision analysis.

[0073] The vehicle body deformation measurement program of Embodiment 1 of the present invention enables a computer to measure the deformation of the vehicle body caused by a collision in a collision analysis. The computer executes the following steps: a collision analysis model acquisition step, which acquires a collision analysis model of the vehicle; a collision analysis step, which performs a collision analysis on the collision analysis model; a vehicle body deformation measurement point and reference point setting step, which sets measurement points for measuring the vehicle body deformation in the collision analysis model and three reference points in the collision analysis model for areas of the vehicle body with no deformation or minimal deformation; a collision start point coordinate acquisition step, which acquires the coordinates of the measurement points and the three reference points in the collision analysis model at the start of the collision; and a post-collision measurement point and reference point coordinate acquisition step, which, based on the results of the collision analysis, determines the post-collision coordinates of the vehicle body after a predetermined time elapsed since the start of the collision. The analysis model obtains the coordinates of the measurement point and the three reference points after the collision. The step of calculating the distance between the reference point and the measurement point at the start of the collision uses the coordinates of the measurement point and the three reference points in the collision analysis model at the start of the collision to calculate the distance between the three reference points and the measurement point at the start of the collision. The step of obtaining the coordinates of the measurement point before vehicle deformation uses the coordinates of the position in the collision analysis model after the collision that satisfies the same distance relationship as the distance from each of the three reference points at the start of the collision as the coordinates of the measurement point before vehicle deformation in the collision analysis model after the collision. The step of measuring vehicle deformation uses the coordinates of the measurement point before vehicle deformation obtained from the collision analysis model after the collision and the coordinates of the measurement point after the collision to measure the vehicle deformation at the measurement point.

[0074] Moreover, such as Figure 1 As shown, the vehicle body deformation measurement program of Embodiment 1 of the present invention can achieve the same effect as the vehicle body deformation measurement method of Embodiment 1 of the present invention described above by having the computer execute steps S1 to S15.

[0075] [Implementation Method 2]

[0076] The method for measuring vehicle body deformation in vehicle collision analysis according to Embodiment 2 of the present invention measures the amount of vehicle body deformation caused by a collision during vehicle collision analysis, such as... Figure 7As shown, the steps include: obtaining the collision analysis model (S1), collision analysis (S3), setting the vehicle body deformation measurement points and reference points (S5), obtaining the coordinates of the measurement points and reference points at the start of the collision (S7), obtaining the coordinates of the measurement points and reference points after the collision (S9), calculating the distance between the reference point and the measurement point after the collision (S21), obtaining the coordinates of the measurement points after the vehicle body deformation (S23), and measuring the vehicle body deformation (S25). The computer performs these steps.

[0077] Here, the steps S1 for obtaining the collision analysis model, S3 for collision analysis, S5 for setting the vehicle body deformation measurement point and reference point, S7 for obtaining the coordinates of the measurement point and reference point at the start of the collision, and S9 for obtaining the coordinates of the measurement point and reference point after the collision are the same as in Embodiment 1 of the present invention. Therefore, the following will explain the steps S21 for calculating the distance between the reference point and the measurement point after the collision, S23 for obtaining the coordinates of the measurement point after the vehicle body deformation, and S25 for measuring the vehicle body deformation.

[0078] Steps for calculating the distance between reference points and measurement points after a collision

[0079] Step S21, which calculates the distance between the reference point and the measurement point after the collision, uses the coordinates of the measurement point and the coordinates of the three reference points in the collision analysis model obtained in step S9 after the collision to calculate the distance between the measurement point and the reference point after the collision.

[0080] In embodiment 2 of the present invention, as Figure 8 As shown in (a), the post-collision distances L1, L2, and L3 between each reference point Q1, Q2, and Q3 and the measurement point P are calculated using the coordinates of the measurement point P in the collision analysis model 1 after a specified time elapsed since the start of the collision and the coordinates of the three reference points Q1, Q2, and Q3.

[0081] Furthermore, in Embodiment 2 of the present invention, similarly to Embodiment 1 described above, eight measuring points P1 to P8 are provided on the base plate 5 (refer to...). Figure 3 Therefore, the collision distances L1, L2, and L3 between each measurement point P1 to P8 and the reference points Q1 to Q3 are calculated.

[0082] Steps for obtaining the coordinates of measurement points after vehicle body deformation

[0083] Step S23: Obtain the coordinates of the measurement points after vehicle body deformation. The coordinates of the positions in the collision analysis model at the start of the collision that satisfy the same distance relationship with the distances from the three reference points after the collision are obtained as the coordinates of the measurement points after vehicle body deformation caused by the collision in the collision analysis model at the start of the collision.

[0084] In embodiment 2 of the present invention, as Figure 8 As shown, based on the post-collision distances L1, L2, and L3 between the measurement point P and the reference points Q1, Q2, and Q3, the coordinates of the measurement point R after the vehicle body deformation in collision analysis model 1 at the start of the collision are obtained. Additionally, as an example... Figure 9 As shown, the coordinates of the measurement point R after the vehicle body deformation can be obtained through the following steps.

[0085] First, such as Figure 9 As shown in (a), find the intersection line T between the sphere S1 centered at the reference point Q1 at the start of the collision and with a radius L1 after the collision, and the sphere S2 centered at the reference point Q2 at the start of the collision and with a radius L2 after the collision. 12 .

[0086] Next, as Figure 9 As shown in (b), find the intersection line T of the sphere S3 centered at the reference point Q3 located at the beginning of the collision and with the distance L3 after the collision. 12 The coordinates of the intersection point C are used as the coordinates of the measurement point R before the vehicle body deforms.

[0087] The coordinates of the measurement point R after the vehicle body deformation are obtained in this way, which are equivalent to the coordinates of the measurement point P in the collision analysis model 1 where the vehicle body deformation occurs without parallel or rotational movement due to the collision.

[0088] It should be noted that, as Figure 9 As shown in (b), there exists a point on the intersection of the sphere S3 and the line T. 12 There are two intersection points C1 and C2. In this case, one of the two intersection points C1 and C2 that obviously does not exist on the collision analysis model 1 (e.g., intersection point C2) is excluded, and the coordinates of the other intersection point C1 are obtained as the coordinates of the measurement point R after the vehicle body deformation.

[0089] Furthermore, in embodiment 2 of the present invention, as Figure 3 As shown, measurement points P1 to P8 are set. Therefore, in step S23, the coordinates of measurement points R1 to R8 after the vehicle body is deformed are obtained for measurement points P1 to P8 respectively.

[0090] Procedure for Measuring Vehicle Body Deformation

[0091] Step S25, which measures the amount of vehicle body deformation, uses the coordinates of the measurement point after deformation obtained from the collision analysis model at the start of the collision and the coordinates of the measurement point at the start of the collision to measure the amount of vehicle body deformation at the measurement point.

[0092] In embodiment 2 of the present invention, as Figure 8As shown in (b), for measurement points P (P1~P8), the coordinates of the measurement points R (R1~R8) after vehicle deformation in the collision analysis model 1 at the start of the collision, obtained in step S23 of obtaining the coordinates of the measurement points after vehicle deformation, and the coordinates of the measurement points and reference points at the start of the collision, obtained in step S7 of obtaining the coordinates of the measurement points and reference points, are used. Figure 2 The coordinates of the measurement points P (P1~P8) before the vehicle body deformation in (a) are determined, and the amount of vehicle body deformation at each measurement point P1~P8 is measured.

[0093] The method for measuring vehicle body deformation according to Embodiment 2 of the present invention, similar to the method for measuring vehicle body deformation according to Embodiment 1 of the present invention, involves setting three reference points at locations with minimal vehicle body deformation. By using the distance relationship between these three reference points and the measurement point for measuring vehicle body deformation, the parallel and rotational displacement of the entire collision analysis model caused by the collision can be excluded, thus enabling the measurement of vehicle body deformation. Therefore, the phenomenon of vehicle body deformation caused by a collision can be understood, leading to improved collision performance and weight reduction of the vehicle body.

[0094] Furthermore, in the vehicle body deformation measurement method of Embodiment 2 of the present invention, although the post-collision distance between the measurement point deformed by the collision and the three reference points is calculated, the absolute value of the post-collision distance is smaller than the distance at the start of the collision in Embodiment 1 above.

[0095] Therefore, according to the vehicle body deformation measurement method of Embodiment 2, the coordinate error of the measurement point after vehicle body deformation that satisfies the same distance relationship as the distance after collision is small. Therefore, compared with Embodiment 1, the vehicle body deformation can be measured with high precision.

[0096] <Procedure for Measuring Vehicle Body Deformation>

[0097] It should be noted that the vehicle body deformation measurement method of Embodiment 2 of the present invention can be configured as a vehicle body deformation measurement program in vehicle collision analysis. This vehicle body deformation measurement program in vehicle collision analysis enables a computer to measure the deformation of the vehicle body caused by the collision in the vehicle collision analysis.

[0098] The vehicle body deformation measurement program of Embodiment 2 of the present invention enables a computer to measure the deformation of the vehicle body caused by a collision in a collision analysis. The computer executes the following steps: a collision analysis model acquisition step, which acquires a collision analysis model of the vehicle; a collision analysis step, which performs a collision analysis on the collision analysis model; a vehicle body deformation measurement point and reference point setting step, which sets measurement points for measuring the vehicle body deformation in the collision analysis model and three reference points in the collision analysis model at locations where the vehicle body has no deformation or only minor deformation; a collision start-point measurement point coordinate and reference point coordinate acquisition step, which acquires the coordinates of the measurement points and the three reference points in the collision analysis model at the start of the collision; and a post-collision measurement point coordinate and reference point coordinate acquisition step, which, based on the results of the collision analysis, determines the post-collision measurement point coordinates and reference point coordinates for the collision analysis model after a predetermined time has elapsed since the start of the collision. The model includes a collision analysis model, which obtains the coordinates of the measurement point and the three reference points after the collision; a collision-reference point-measurement point distance calculation step, which uses the coordinates of the measurement point and the three reference points in the collision analysis model after the collision to calculate the collision-related distances between the three reference points and the measurement point; a body deformation measurement step, which uses the coordinates of the measurement point obtained from the collision analysis model at the beginning of the collision that satisfy the same distance relationship with the respective three reference points after the collision as the coordinates of the measurement point after the body deformation caused by the collision in the collision analysis model at the beginning of the collision; and a body deformation measurement step, which uses the coordinates of the measurement point after the body deformation obtained from the collision analysis model at the beginning of the collision and the coordinates of the measurement point at the beginning of the collision to measure the body deformation at the measurement point.

[0099] Moreover, such as Figure 7 As shown, the vehicle body deformation measurement procedure of Embodiment 2 of the present invention can achieve the same effect as the vehicle body deformation measurement method of Embodiment 2 of the present invention described above by executing steps S1 to S25.

[0100] Example

[0101] Since an analysis confirming the effectiveness of the present invention has been conducted, this will be explained below. In embodiments of the present invention, such as... Figure 2 As shown, taking a side collision in the width direction of the vehicle body as the object of the collision analysis model 11 relative to the left side of the vehicle body as the object of the collision, the deformation of the vehicle body is measured according to the steps described in Embodiment 2 above.

[0102] When measuring vehicle body deformation, firstly, as... Figure 3As shown, measurement points P1 to P8 are set on the base plate 5 of the vehicle body 3, which constitutes the collision analysis model 1, to measure the deformation of the vehicle body. Here, measurement points P1 to P3 are set near the B-pillar in the base plate 5, measurement points P4 to P7 are set in the sheet mounting holes in the base plate 5, and P8 is set at the center of the sheet mounting holes.

[0103] And, as Figure 4 As shown, in the side collision of collision analysis model 1, reference points Q1 to Q3 are set on the right side face 3a of the vehicle body where the deformation is less.

[0104] Next, collision analysis conditions such as the position, direction, and impact speed (=29km / h) of the colliding body 11 into the collision analysis model 1 are set, and collision analysis is performed.

[0105] Next, based on the collision analysis results, the coordinates of the measurement points P1 to P8 and the reference points Q1 to Q3 at the beginning of the collision are obtained, and the coordinates of the measurement points P1 to P8 and the reference points Q1 to Q3 after 0.05 seconds from the beginning of the collision are obtained.

[0106] Next, the post-collision distances between each measurement point P1 to P8 in the base plate 5 of the collision analysis model 1 and the reference points Q1 to Q3 are calculated, such as... Figure 8 As shown, the coordinates of the measurement point R in the collision analysis model 1 after the vehicle body deformation at the start of the collision are obtained.

[0107] Furthermore, the amount of vehicle body deformation is measured based on the coordinates of the measurement points after vehicle body deformation and the coordinates of the measurement points at the start of the collision. In this embodiment of the invention, the amount of vehicle body deformation is measured as the sum of the vehicle body deformation in the front-to-back direction (X direction), the vehicle body width direction (Y direction), and the vehicle body vertical direction (Z direction); and the amount of vehicle body deformation in the vehicle body width direction (Y direction).

[0108] Table 1 shows the coordinates of the reference points Q1 to Q3 set in collision analysis model 1 at the start of the collision and 0.05 seconds after the start of the collision.

[0109] [Table 1]

[0110]

[0111] In addition, Table 2 shows the coordinates at the start of the collision and the coordinates after the collision 0.05 seconds after the start of the collision for each measurement point P1 to P8 set on the base plate 5. Figure 9The coordinates of the intersection points C1 and C2 of the three spheres S1 to S3 with radii L1 to L3 between the three reference points Q1 to Q3 after the collision, and the vehicle body deformation at each measurement point P1 to P8.

[0112] [Table 2]

[0113]

[0114] According to the results in Table 2, among intersection points C1 and C2, the Y-coordinate of intersection point C2 is all negative (-), which is roughly the same as at the beginning of the collision. Therefore, it is not located on collision analysis model 1. Thus, intersection point C1 is determined as the measurement point R of the vehicle body after deformation in collision analysis model 1 at the beginning of the collision.

[0115] In addition, as shown in Table 2, the vehicle body deformation at measurement points P1 to P8 excludes the parallel and rotational movement of collision analysis model 1 caused by the collision. Obviously, in the total deformation in the XYZ direction and the deformation in the width direction of the vehicle body, the vehicle body deformation is on the order of less than 10 mm.

[0116] Industrial applicability

[0117] According to the present invention, a method and procedure for measuring the amount of vehicle body deformation in a collision analysis of an automobile can be provided. In a collision analysis using an automobile collision analysis model, the amount of vehicle body deformation that excludes the amount of movement caused by parallel movement and rotational movement of the collision analysis model caused by the collision can be measured.

[0118] Explanation of reference numerals in the attached figures

[0119] 1: Collision analysis model; 3: Vehicle body; 3a: Right side face; 5: Floor; 11: Collision body; C, C1, C2: Intersection points; P, P1, P2, P3, P4, P5, P6, P7, P8: Measurement points; Q, Q1, Q2, Q3: Reference points; S1, S2, S3: Spherical surfaces; T 12 Intersection line.

Claims

1. A method for measuring vehicle body deformation in a collision analysis, comprising measuring the amount of vehicle body deformation caused by a collision in a collision analysis. To make the computer perform: The collision analysis model acquisition step involves acquiring the collision analysis model of the vehicle. The collision analysis step involves performing a collision analysis on the collision analysis model. The steps for setting vehicle body deformation measurement points and reference points include setting the measurement points for measuring vehicle body deformation in the collision analysis model and setting three reference points in the collision analysis model for parts of the vehicle body that have no deformation or only slight deformation. The step of obtaining the coordinates of the measurement point and the reference point at the start of the collision involves obtaining the coordinates of the measurement point and the coordinates of the three reference points in the collision analysis model at the start of the collision. The steps for obtaining the coordinates of the measured point and the reference point after the collision are based on the results of the collision analysis. For the collision analysis model after a specified time has elapsed since the start of the collision, the coordinates of the measured point and the coordinates of the three reference points after the collision are obtained respectively. The step of calculating the distance between the reference point and the measurement point at the start of the collision uses the coordinates of the measurement point and the coordinates of the three reference points in the collision analysis model at the start of the collision to calculate the distance between the three reference points and the measurement point at the start of the collision. The step of obtaining the coordinates of the measurement point before the vehicle body deformation involves obtaining the coordinates of the position in the collision analysis model after the collision that satisfies the same distance relationship as the distance from each of the three reference points at the start of the collision, as the coordinates of the measurement point before the vehicle body deformation in the collision analysis model after the collision. The vehicle body deformation measurement step uses the coordinates of the measurement point before deformation and the coordinates of the measurement point after the collision obtained from the collision analysis model to measure the vehicle body deformation at the measurement point.

2. A method for measuring vehicle body deformation in a collision analysis, comprising measuring the amount of vehicle body deformation caused by a collision in a collision analysis. To make the computer perform: The collision analysis model acquisition step involves acquiring the collision analysis model of the vehicle. The collision analysis step involves performing a collision analysis on the collision analysis model. The steps for setting vehicle body deformation measurement points and reference points include setting the measurement points for measuring vehicle body deformation in the collision analysis model and setting three reference points in the collision analysis model for parts of the vehicle body that have no deformation or only slight deformation. The step of obtaining the coordinates of the measurement point and the reference point at the start of the collision involves obtaining the coordinates of the measurement point and the coordinates of the three reference points in the collision analysis model at the start of the collision. The steps for obtaining the coordinates of the measured point and the reference point after the collision are based on the results of the collision analysis. For the collision analysis model after a specified time has elapsed since the start of the collision, the coordinates of the measured point and the coordinates of the three reference points after the collision are obtained respectively. The step of calculating the distance between the reference point and the measurement point after the collision uses the coordinates of the measurement point and the coordinates of the three reference points in the collision analysis model after the collision to calculate the post-collision distance between the three reference points and the measurement point respectively. The step of obtaining the coordinates of the measurement point after the vehicle body deformation involves obtaining the coordinates of the position in the collision analysis model at the beginning of the collision that satisfies the same distance relationship as the distance from the three reference points after the collision as the coordinates of the measurement point after the vehicle body deformation caused by the collision in the collision analysis model at the beginning of the collision. The vehicle body deformation measurement step uses the coordinates of the measurement point after the vehicle body deformation obtained from the collision analysis model at the start of the collision and the coordinates of the measurement point at the start of the collision to measure the vehicle body deformation at the measurement point.

3. A vehicle body deformation measurement program for collision analysis, comprising a computer measuring the deformation of the vehicle body caused by a collision during collision analysis. Cause the computer to perform: The collision analysis model acquisition step involves acquiring the collision analysis model of the vehicle. The collision analysis step involves performing a collision analysis on the collision analysis model. The steps for setting vehicle body deformation measurement points and reference points include setting the measurement points for measuring vehicle body deformation in the collision analysis model and setting three reference points in the collision analysis model for parts of the vehicle body that have no deformation or only slight deformation. The step of obtaining the coordinates of the measurement point and the reference point at the start of the collision involves obtaining the coordinates of the measurement point and the coordinates of the three reference points in the collision analysis model at the start of the collision. The steps for obtaining the coordinates of the measured point and the reference point after the collision are based on the results of the collision analysis. For the collision analysis model after a specified time has elapsed since the start of the collision, the coordinates of the measured point and the coordinates of the three reference points after the collision are obtained respectively. The step of calculating the distance between the reference point and the measurement point at the start of the collision uses the coordinates of the measurement point and the coordinates of the three reference points in the collision analysis model at the start of the collision to calculate the distance between the three reference points and the measurement point at the start of the collision. The step of obtaining the coordinates of the measurement point before the vehicle body deformation involves obtaining the coordinates of the position in the collision analysis model after the collision that satisfies the same distance relationship as the distance from each of the three reference points at the start of the collision, as the coordinates of the measurement point before the vehicle body deformation in the collision analysis model after the collision. The vehicle body deformation measurement step uses the coordinates of the measurement point before deformation and the coordinates of the measurement point after the collision obtained from the collision analysis model to measure the vehicle body deformation at the measurement point.

4. A vehicle body deformation measurement program for collision analysis, comprising a computer measuring the deformation of the vehicle body caused by a collision during collision analysis. Cause the computer to perform: The collision analysis model acquisition step involves acquiring the collision analysis model of the vehicle. The collision analysis step involves performing a collision analysis on the collision analysis model. The steps for setting vehicle body deformation measurement points and reference points include setting the measurement points for measuring vehicle body deformation in the collision analysis model and setting three reference points in the collision analysis model for parts of the vehicle body that have no deformation or only slight deformation. The step of obtaining the coordinates of the measurement point and the reference point at the start of the collision involves obtaining the coordinates of the measurement point and the coordinates of the three reference points in the collision analysis model at the start of the collision. The steps for obtaining the coordinates of the measured point and the reference point after the collision are based on the results of the collision analysis. For the collision analysis model after a specified time has elapsed since the start of the collision, the coordinates of the measured point and the coordinates of the three reference points after the collision are obtained respectively. The step of calculating the distance between the reference point and the measurement point after the collision uses the coordinates of the measurement point and the coordinates of the three reference points in the collision analysis model after the collision to calculate the post-collision distance between the three reference points and the measurement point respectively. The step of obtaining the coordinates of the measurement point after the vehicle body deformation involves obtaining the coordinates of the position in the collision analysis model at the beginning of the collision that satisfies the same distance relationship as the distance from the three reference points after the collision as the coordinates of the measurement point after the vehicle body deformation caused by the collision in the collision analysis model at the beginning of the collision. The vehicle body deformation measurement step uses the coordinates of the measurement point after the vehicle body deformation obtained from the collision analysis model at the start of the collision and the coordinates of the measurement point at the start of the collision to measure the vehicle body deformation at the measurement point.

Images