JP2009175823A - Display system for movable route of wire harness - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that the actual route of deflection of a wire harness is hardly predicted so as to hardly take actual countermeasures since the route to a point with actual problem of deflection of the wire harness is not recognized though a movable range of deflection of the wire harness is predicted in a conventional manner. <P>SOLUTION: A display system for a movable route of a wire harness includes, in addition to a predicting means for a movable range of a wire harness: an automatic outermost point display means 31 for generating and displaying the outermost points Mp at optional positions of the maximum movable positions Mh on the movable range surface (A) of the displayed wire harness 9; an outermost point route analysis condition imparting means 32 for imparting a route analysis condition to the outermost points Mp; a selection indicating means 4 for selecting the displayed one outermost point Mpx; and a route display means 33 for performing finite element method analysis with the use of the analysis condition imparted to the selected outermost point Mpx, and displaying the route 9a of deflection of the wire harness 9 including the outermost point Mpx. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  According to the present invention, for a wire harness that is constrained and wired with a restraint at a distance from each other, it is compulsory from a reference routing path corresponding to a line-shaped analysis model composed of nodes analyzed by the finite element method. The wire harness movable range prediction method that displays the wire harness movable range surface by analyzing the movable range that can be moved by the finite element method is used, and the maximum corresponding to an arbitrary maximum movable position within the movable range surface is used. The present invention relates to a wire harness movable path display system that selects an external point, displays a movable path of the wire harness including the outermost point, and prevents disconnection, abnormal noise, and the like due to interference with peripheral components due to the swing of the wire harness.

  The wire harness is a bundle of electric wires that supply electricity to automobile equipment, electrical equipment, and the like. In the case of a car, it is said that it is stretched around every part of the car and plays the role of blood vessels and nerves in humans. When the wire harness is disposed in an automobile, for example, there is a possibility that disconnection, abnormal noise, etc. may occur due to interference with peripheral components due to fluctuation of the wire harness caused by running of the automobile.

  Therefore, conventionally, a method for predicting the movable range of the wire harness shake between the restraints and displaying the predicted movable range on the surface (display portion of the personal computer) has been sought.

  In Patent Document 1 (Prior Art 1), a wire composed of a plurality of wire rods is regarded as an elastic body in which a plurality of beam elements having a circular cross section and maintained in linearity are combined, and a finite element method using a computer This is a method for predicting the movable range of a wire routed at a predetermined location by calculation using, and for a node that is a connection point of a plurality of beam elements other than a restraint site in a stable wire Predicting the movable range of a wire-like structure by using the finite element method to calculate the movable range of a wire when a predetermined force is applied in a predetermined direction so as to satisfy the shape characteristics, material characteristics and constraint conditions of the wire A method is disclosed.

  That is, with respect to the wire harness clamped at both ends, with the restraint position and direction as restraint conditions, the node or beam element translates in three axes and has six degrees of freedom around the three axes according to the hook law. In other words, assuming that there are 12 degrees of freedom at each node of each beam element, the shape characteristics of the length and cross-sectional area of the wire harness and the cross-sectional area, cross-sectional moment of inertia, density, longitudinal elastic modulus and transverse elastic modulus of the beam element It is assumed that a relationship corresponding to a force vector of 12 rows is established by a product of a stiffness vector of 12 rows and 12 columns corresponding to material characteristics and a displacement vector of 12 rows of translation and rotation. Then, for a wire harness in which three or more nodes are continuous, on the premise that the continuity and force of displacement between the nodes are balanced, the routing path function corresponding to the hook law of the following equation (1) The wiring route of the wire harness is analyzed.

[K] {x} = {F} (1)
Here, K: rigidity vector calculated or measured based on the above-described shape characteristics and material characteristics and corresponding to the above-described spring constant, x: displacement vector, F: force vector.

  As a result, on the premise of restraint conditions that define the restraint position and restraint direction of both ends of the wire harness, the beam element as an elastic body is interposed according to the shape characteristics and material properties of the length and circular cross-sectional shape of the wire harness. The standard routing route is analyzed in a state where the forces in the three-dimensional directions of each node are balanced, and the routing route when force is applied to the nodes, that is, gravity, engine drive, vibration during running It is possible to analyze the displacement from the reference routing path caused by the above, and to analyze the force against the displacement.

  In Patent Document 2 (Prior Art 2), an image display means for performing graphic display imitating the three-dimensional shape of a flexible object such as a wire harness on the screen, a specific part designated on the screen of the flexible object, and movement A coordinate value recognition means for recognizing a given movement position as a three-dimensional coordinate value in a three-dimensional virtual space, and a plurality of nodes that divide the restricted parts including a specific part recognized for an analysis model of a flexible object. Using the finite element method to specify the node setting means to be set and the material property data, shape data, and constraint conditions of the flexible object as input conditions, in response to the recognized moving position and the three-dimensional coordinate value data of the set node It is equipped with a deformation analysis means that creates a deformation analysis model by analyzing the deformation of the analysis model in the initial state as the part moves, and displays a graphic display imitating the three-dimensional shape of the deformed flexible object Deformation analysis apparatus flexible object is disclosed. Thereby, when removing the connector attached to the end of a wire harness, the positional relationship with respect to the movement path | route and the surrounding interference object can be confirmed.

Further, the present inventor has proposed a “wire harness movable range analysis method” in Japanese Patent Application No. 2007-228579 (Prior Art 3). Prior art 3 includes a “line-like analytical model that is considered to have a beam element as an elastic body between each node group in a wire harness that is constrained and arranged with a restraint at a distance from each other. In contrast, the finite element method analyzes the movable range in which the wire harness can be forcibly moved from the reference routing route analyzed in accordance with the shape characteristics, material characteristics and constraint conditions of the wire harness by the finite element method. A method of analyzing a movable range of a harness,
Arbitrary plural so as to form a vertex of a triangle having a straight reference line between the constraint points on both sides as a base and a line length of the analysis model as two sides on a flat analysis surface including the reference line Geometrically position each node at the vertex,
As a node analysis path to analyze whether or not the node belonging to each vertex can move from the reference routing path, each line is set with a perpendicular to the reference line from each vertex, and each vertex is set as the limit of the movable range. Analyzes the maximum movable position according to whether or not deformation of the wire harness corresponding to the shape characteristics of the wire harness, the material characteristics, and the constraint conditions can be allowed at the set position of the belonging node on the route. There is a description of “a movable range analysis method for a wire harness,” in which the position is analyzed for each of a plurality of analysis surfaces rotated at predetermined rotation angles around a reference line.

  A wire harness movable range analyzing apparatus for performing the wire harness movable range analyzing method of the prior art 3 is shown in FIG. The wire harness movable range analyzer is a display unit as a display unit for the personal computer 1 that analyzes the maximum movable range from the analyzed routing route for the wire harness W routed on an instrument panel or the like of an automobile. 2 and an input / output unit 6 having an input / output keyboard 3 and a mouse 4 and an input / output disk drive 5 in which a recording medium is set.

  The personal computer 1 incorporates a CPU, a memory, etc., and is operated by a program to constitute the following units. The analysis condition storage means 11 stores analysis conditions such as material characteristics and shape characteristics of the wire harness W and constraint conditions such as a three-dimensional coordinate value and a constraint direction of the constraint part. The routing path analyzing means 10 is constrained at a distance from each other by the restraint CL based on the analysis conditions of the analysis condition storage means 11, and a stable reference routing path of the wire harness W is formed in a line shape of a center line by a finite element method. Analyze the analysis model. The display control means 12 displays the three-dimensional virtual space on the screen 2a of the display unit 2 in response to the input image display data, and performs graphic display imitating the three-dimensional shape. The movable range analysis unit 20 includes a vertex setting unit 21, an analysis path setting unit 22, a movable position determination unit 23, and a movable range data creation unit 24, and analyzes the movable range of the wire harness.

  Next, a method of analyzing the movable range of the wire harness according to the prior art 3 will be described with reference to the flowchart shown in FIG. First, the related analysis software is loaded from the input / output unit 5 and the analysis conditions and the like are input, and the wiring path analysis unit 10 performs the reference according to the analysis conditions of the analysis condition storage unit 11 registered in advance for the wire harness W. The stable routing route is analyzed. The display control means 12 displays on the screen 2a the wiring shape that is thickened in a cylindrical shape corresponding to the circular cross section of the wire harness W, imitating a three-dimensional shape. When the analysis of the movable range is instructed with respect to the routing path between the restraints CL1 and CL2 shown in FIG. 3, in the movable range analyzing unit 20, vertices forming triangles for the respective nodes b1 to b10 are about the respective reference planes. Analysis is performed (see FIG. 2B, S1).

  Next, a perpendicular analysis path is set (S2), and the maximum movable positions Mh111 to Mh1011 in which movement of the belonging nodes b1 to b10 is allowed from the reference routing path on the analysis path are determined by the finite element method. Analysis is performed (see FIG. 2C, S3). In the figure, a cross indicates a vertex, and a circle indicates a maximum movable position. That is, the nodes b1 to b10 are moved toward the apex along the analysis path to which the nodes belong, and whether or not the solution of the analysis model M1 can be obtained, that is, the limit position where the routing path function according to the above equation (1) converges. Are determined as the maximum movable positions Mh111 to Mh1011.

In response to the outermost movable range data created by connecting the maximum movable positions Mh1 to Mh10 for each reference plane and connecting the common vertex maximum positions Mh1 to Mh10 in order, an arbitrary reference plane is set. When viewed from the front, a mesh-like three-dimensional image for confirming the maximum movable range from the reference routing route is displayed on the screen 2a (see FIG. 2D, S4). A rotational position necessary for confirmation can be designated by the input device 4 and a front-view image of the region can be displayed.
JP 2004-119613 A JP 2005-149055 A

  However, with the wire harness movable range analysis method of Prior Art 3, the movable range in which the wire harness can swing was predicted, but the route until the wire harness swings to any one outermost point where the problem actually occurs is determined. It could not be shown, and the path of the run was unknown. For this reason, since it is difficult to predict the path in which the actual wire harness swings, there has been a problem that it is difficult to take measures in design or the like when the wire harness is actually arranged.

   For this reason, there is a risk that disconnection, abnormal noise, etc. may occur due to interference with peripheral components due to runout of the wire harness due to traveling of the automobile or the like.

In order to solve the above-mentioned problems, a wire-like analysis in which a wire element as an elastic body is assumed to be interposed between each node group of wire harnesses that are constrained and arranged with a restraint at an interval. For the model, analyze the movable range by which the wire harness can be forcibly moved from the reference routing route analyzed according to the shape characteristics, material characteristics and constraint conditions of the wire harness by the finite element method. In addition to the wire harness movable range prediction method that predicts and displays the movable range surface,
An outermost point automatic display means for creating and displaying a plurality of outermost points at arbitrary positions of the maximum movable position of the movable range surface of the displayed wire harness;
Outermost point route analysis condition assigning means for assigning route analysis conditions to the outermost point created and displayed;
Selection instruction means for selecting any one of the displayed outermost points;
It is characterized by comprising a path display means for performing a finite element method analysis according to the analysis condition given to the outermost point selected by the selection instruction means, and displaying the deflection path of the wire harness including the outermost point. We propose a moving path display system for wire harnesses.

Further, the method of predicting the movable range of the wire harness is a triangle in which the straight reference line between the constraint points on both sides is the base, and the analysis model line length is two sides on the flat analysis surface including the reference line. Arbitrary multiple nodes are respectively geometrically positioned at the vertices to form vertices of
As a node analysis path for analyzing whether or not the nodes belonging to each vertex can move from the reference routing path, a perpendicular to the reference line is set from each vertex.
Whether the deformation of the wire harness corresponding to the shape characteristics, material characteristics and restraint conditions of the wire harness is allowed or not at the setting position of the belonging node on each analysis path, with the apex being the limit of the movable range, Analyze the maximum movable position,
This is a wire harness movable range prediction method for creating a movable range surface of a wire harness by performing analysis of the maximum movable position for each of a plurality of analysis surfaces rotated at predetermined rotation angles around a reference line. The wire harness movable path display system described in the column is proposed.

  According to the present invention, it is possible to easily display the movable path of the swing of the automobile wire harness that could not be displayed by the conventional prediction means.

  For this reason, it is possible to perform wiring that prevents in advance interference with peripheral components due to fluctuations in the wiring harness caused by traveling of the automobile, and it is possible to prevent disconnection of the wiring harness, generation of abnormal noise, and the like.

  FIGS. 1 to 4 for explaining the wire harness movable range prediction method used in the wire harness movable path display system according to the embodiment of the present invention, FIG. 5 is also a flowchart showing the wire harness deflection path display means, and FIG. FIG. 6 is an explanatory diagram showing a state in which any one of the outermost points in FIG. 5 is selected and instructed by the selection instruction means, and FIG. 7 is a diagram showing a state in which the path of the analysis result in FIG. 5 is displayed. explain.

  The wire harness movable path display system according to the embodiment of the present invention is based on the wire harness movable range predicting means (FIG. 4E) described in the prior art 3. A movable range analyzing apparatus used for the movable range predicting method of the wire harness is shown in FIG. 1 and will be described below.

  The movable range analysis device is used to analyze the maximum movable range from the analyzed routing route, for example, for a wire harness that is intermittently constrained and routed to an automobile instrument panel or its surrounding body. A personal computer 1 is used, and a display unit 2, a keyboard 3 and a mouse 4 as input units, and an input / output unit 5 such as an input / output disk drive 6 in which a recording medium such as a CD is set are attached. The following units are configured by incorporating a CPU, a memory and the like and operating according to a program.

  That is, the analysis condition storage means 11 for storing analysis conditions such as constraint conditions such as the material characteristics and shape characteristics of the wire harness, the three-dimensional coordinate values and the constraint direction of the constraint part, and the mutual spacing between the constraint tools based on the analysis conditions And a routing path analyzing means 10 for analyzing a stable standard routing path of the wire harness by a finite element method with respect to a line-shaped analytical model of the center line, and a display unit 2 in response to input image display data Display control means 12 for performing graphic display imitating a three-dimensional shape in the three-dimensional virtual space of the screen 2a, a movable range analyzing unit 20 for analyzing the movable range of the wire harness, and a wire harness movable path display unit 30 Composed.

  This movable range analysis unit forms triangular vertices with the base line of the straight line between the constraint points on both sides as the base and the line length of the analysis model as two sides on the flat analysis surface including the base line As described above, the vertex setting means 21 for geometrically setting an arbitrary plurality of nodes as vertices, and whether or not the nodes belonging to the respective geometric vertices are movable from the reference routing path. As an analysis path of a node for analysis, an analysis path setting means 22 for setting a perpendicular to the reference line from each vertex, and a wire at a set position of the node on the analysis path with the vertex as a limit of the movable range The maximum movable position determination means 23 for analyzing the maximum movable position based on whether or not the deformation of the wire harness can be allowed based on the shape characteristics, material characteristics and restraint conditions of the harness, and the reference line For multiple analysis surfaces rotated at a fixed rotation angle, the maximum movable positions analyzed for multiple nodes on each analysis surface are connected in order, and the maximum movable between common vertices with different rotation angles. The movable range data creating means 24 creates movable range data in a three-dimensional space that connects positions in order.

  For example, as shown in FIG. 3 and FIG. 2 (A), the routing route analysis means 10 is circular with respect to the wire harness 9 to be routed by being completely restrained by restraints CL1 and CL2 in different directions. By considering a plurality of beam elements that maintain the linearity of the cross section as an elastic body connected at the nodes, the length of the wire harness 9 and the shape characteristics of the circular cross section, a group of nodes at intervals of, for example, 5 mm along the center line Based on the above-mentioned equation (1), using the three-dimensional coordinate values of b1 to b10, the cross-sectional area of the beam element, the secondary moment of section, the material properties such as the density, the longitudinal elastic modulus, the transverse elastic modulus, and the restraint position / direction as analysis conditions By analyzing the torsional rotation amount and the three-dimensional position resulting from the translation centering on the aforementioned center line for each node based on the routing path function, the stability between the constraint points a1 and a2 To create a linear analytical model M1 that defines the reference wiring pathway. In this way, the routing route in the three-dimensional space is analyzed for the entire area of the wire harness 9.

  As shown in FIGS. 2 (A) and 2 (B), the vertex setting means 21 of the movable range analysis unit 20 has a line length of the line-shaped analysis model M1 for each of the nodes b1 to b10 between the constraint points a1 and a2 on both sides. For example, the vertex position is calculated by assuming that L1 is about 110 mm which is longer than the distance of 100 mm of the reference line B1 by the amount of curvature. That is, assuming that the length of the base and the sum of the lengths of the two sides on both sides of the vertex are known, the constraint points on both sides of the nodes b1 to b10 are assumed on the assumption that the triangle, that is, the vertex position can be defined. A linear reference line B1 between a1 and a2 is used as a base, and the vertex position of a triangle defined according to the line length L1 and the line segment length on both sides of any node on the line is set.

  As shown in FIG. 2C, the analysis path setting means 22 analyzes the intersections h1 to h10 that are the legs of the perpendicular to the reference line B1 from each vertex position, and sets each perpendicular. For each reference plane, the movable position determination means 23 at a minute interval from the reference routing path (FIG. 2 (A)) to the geometric vertex in the vertical analysis path to which the nodes b1 to b10 belong. The maximum positions Mh <b> 1 to Mh <b> 10 that converge when sequentially moved are analyzed using the analysis software of the above-described equation (1) that constitutes the routing route analysis means 10.

  That is, in the process of sequentially moving the analysis paths to which the nodes b1 to b10 belong by a minute amount, as described above with reference to FIG. 5, the nodes on both sides of the common position belonging to the node b1 and the both sides of the node b2 The maximum position is analyzed in a range in which the displacements between the nodes,... On both sides of the node b10 are equal and the forces are balanced. Incidentally, the displacement vector {x} corresponding to the amount of movement cannot be equal due to the difference in stiffness vector [K] on both sides, or the displacement due to the change in the surrounding routing shape. If the vector {F} cannot be balanced, the relationship of Expression (1) is not established, that is, does not converge.

  As for the node b1, the deformation curvature of the wire harness 9 is reduced in the process of moving to the geometric maximum position, and the maximum position Mh1 within a converging range is determined at a position below the vertex v1 indicated by the x mark. . For the nodes b2 to b8, the maximum positions Mh2 to Mh8 coincide with the vertices to which they belong, which are indicated by x marks. The node b9 is greatly deformed from the routing position on the analysis surface of the reverse rotation phase with respect to the reference line B1 due to the restraining direction at the restraint point a2, and reaches the vertex v9. However, the maximum position Mh9 slightly exceeding the reference line B1 is determined. As for the node b10, the deformation is further restricted by the restriction of the restriction point a2 at the closest position, and the maximum position Mh10 is determined on the analysis surface of the reverse rotation phase.

  It should be noted that the setting to the analysis path to which the nodes b1 to b10 belong in the movable position determining means 23 confirms whether or not the nodes b1 to b10 are converged at the vertex position in the opposite direction to the sequential movement toward the vertex, and does not converge. In some cases, it may be possible to move from the apex to the reference line B1 on the analysis path.

  As shown in FIG. 2 (D), the movable range data creating means 24 displays the maximum movable positions Mh11 to Mh102 on the analysis surface shown in FIGS. For example, the maximum movable positions Mh12 to Mh102 connected in the order of the analysis plane rotated by 30 ° and the points of the maximum movable positions common to the vertices are connected in order, and the same is rotated over a range of 360 ° by a predetermined angle similarly. The points of the maximum movable positions of the vertices are sequentially connected, and movable range data that connects the last Mh111 to Mh1011 and the first maximum movable positions Mh11 to Mh102 is created (FIG. 2 is omitted).

  In response to the movable range data, the display control unit 12 graphically displays a three-dimensional mesh image indicating the maximum movable range in the three-dimensional virtual space on the screen 2a of the display unit 2. The display includes a state in which the reference line B1 is viewed in front in the three-dimensional virtual space on the screen 2a with respect to the three-dimensional coordinate system of the CAD for analyzing the movable range of the movable range data by a known method, In accordance with an operation command from the outside, it is converted into image display data viewed from an arbitrary direction, and graphic display is performed. As a modification of the movable range data creating means, when the points for displaying the maximum movable position are not connected, the display control means 12 displays the maximum movable range as a point cloud or a plot image instead of a mesh image. indicate.

  The wire harness movable range prediction means described above will be described based on the flowchart shown in FIG. When the prediction of the movable range of the wire harness W is started, each joint point is positioned at the apex of a triangle having the base line between the constraint points as the base and the line segment length on both sides of the node as two sides. Next, a perpendicular line is set from the vertex to the reference line. Next, the outermost movable position where the movement of the node from the reference routing path is allowed on the analysis path with the vertex as a limit is analyzed by the finite element method. Next, the outermost movable positions of the nodes are analyzed by a finite element method with respect to a plurality of analysis planes rotated at predetermined rotation angles around the reference line. Finally, the outermost movable position on each analysis plane is connected by a line in order, and the outermost movable position of common vertices with different rotation angles are connected in order to create movable range data in a three-dimensional space. The movable range image is displayed in virtual three-dimensional.

  Using the movable range surface A of the wire harness 9 displayed on the screen of the display unit 2 by the wire harness movable range predicting means (FIG. 4E), the wire harness movable path display unit 30 then uses the movable range surface A of the wire harness. Nine movable paths are predicted and displayed in advance. The wire harness movable path display unit 30 includes an outermost point automatic display means 30, an outermost point path analysis condition giving means 31, a path display means 32, and a selection instruction means 4.

  A plurality of arbitrary outermost points Mp are created by the outermost point automatic display means 31 at an arbitrary position of the maximum movable position Mh1--n of the movable range plane A of the wire harness 9 displayed on the screen of the display unit 2. This is displayed (see FIG. 4F and FIG. 6).

  A route analysis condition is assigned to each displayed outermost point Mp by the outermost point route analysis condition assigning means 31 (FIG. 4F).

  Next, as shown in FIG. 5 and FIG. 6, any one of the outermost points Mpx displayed on the screen 2a is selected by the selection instruction means (mouse) 4 of the wire harness movable path display unit 30 to perform path analysis. Give instructions. In this embodiment, the selection instruction means 4 is the mouse 4 of the personal computer 1, and the act of selecting and instructing is a click of the mouse 4. As another embodiment of the selection instruction means 4, any member that can perform the same action as a mouse such as a keyboard of a personal computer or a touch panel is possible. In that case, the act of selecting and instructing is touching the keyboard or touch panel. In FIG. 6, 9a shows the analysis origin path | route of the wire harness containing the outermost point Mpx selected and instruct | indicated path | route analysis.

  Next, the finite element method analysis is performed according to the analysis condition given to the outermost point Mpx selected and instructed by the selection instructing means 4, and the wire harness 9 including the outermost point Mpx as shown in FIG. The route 9a can be displayed on the screen 2a of the display unit 2 by the route display means 32.

  The outermost point automatic display means 30, the outermost point path analysis condition assigning means 31, and the path display means 32 described above are computer software set in the personal computer 1.

  The present invention relates to the arrangement of a wire harness, and can be used in automobiles, motorcycles such as motorcycles, and the electric industry.

The block diagram explaining the structure of the movable range analyzer which implements the wire harness movable range prediction method used for the wire harness movable path | route display system which is embodiment of this invention Explanatory drawing explaining operation | movement of the movable range analyzer of FIG. The front view which shows the wire harness used as the analysis object of the movable range analyzer of FIG. The flowchart explaining operation | movement of the movable range analyzer of FIG. The flowchart of the wire harness path | route display part used for the wire harness movable path | route display system which is embodiment of this invention Explanatory drawing showing the state of clicking one of the displayed outermost points with the mouse Explanatory drawing which similarly shows the state which displayed the wire harness deflection | deviation path | route of the analysis result of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 PC 2 Display part 3 Keyboard 4 Mouse 5 Input / output part 6 Disk drive 9 Wire harness 9a Wire harness analysis origin path 10 Routing path analysis means 11 Display control means 12 Display control means 20 Movable range analysis part 21 Vertex setting means 22 Analysis path setting means 23 Movable position determination means 24 Movable range data creation means 30 Wire harness path display unit 31 Outermost point automatic display means 32 Outermost point path analysis condition provision means 33 Path display means
a1, a2, restraint point B1 reference line b1-b10 node CL1, CL2 restraint tool h1-h10 intersection L1 line length M1 analysis model
Mh1 to Mh10 Maximum movable position A Wire harness movable predicted range Mp1 to Mpn Outermost point of wire harness movable predicted range Mpx Any one outermost point selected and instructed

Claims (2)

For wire harnesses that are constrained and arranged with restraints spaced apart from each other, a finite element method is applied to a line-shaped analytical model that is considered to have a beam element as an elastic body between each node group. Analyzing the movable range where the wire harness can be forcibly moved from the reference routing route analyzed according to the shape characteristics, material characteristics and restraint conditions of the wire harness, predicting the movable range, In addition to the method of predicting the movable range of the wire harness to be displayed,
An outermost point automatic display means for creating and displaying a plurality of outermost points at arbitrary positions of the maximum movable position of the movable range surface of the displayed wire harness;
Outermost point route analysis condition assigning means for assigning route analysis conditions to the outermost point created and displayed;
Selection instruction means for selecting any one of the displayed outermost points;
It is characterized by comprising a path display means for performing a finite element method analysis according to the analysis condition given to the outermost point selected by the selection instruction means, and displaying the deflection path of the wire harness including the outermost point. A moving path display system for wire harnesses. The method for predicting the movable range of the wire harness is a triangular vertex with the straight reference line between the constraint points on both sides as the base and the analysis model line length as two sides on the flat analysis surface including the reference line Arbitrary multiple nodes at the vertices, respectively, so as to form
As a node analysis path for analyzing whether or not the nodes belonging to each vertex can move from the reference routing path, a perpendicular to the reference line is set from each vertex.
Whether the deformation of the wire harness corresponding to the shape characteristics, material characteristics and restraint conditions of the wire harness is allowed or not at the setting position of the belonging node on each analysis path, with the apex being the limit of the movable range, Analyze the maximum movable position,
A wire harness movable range prediction method for creating a movable range surface of a wire harness by performing analysis of the maximum movable position for each of a plurality of analysis surfaces rotated at predetermined rotation angles around a reference line. Item 4. The wire harness movable path display system according to Item 1.

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