JP5644652B2 - Arithmetic apparatus, arithmetic method and arithmetic program - Google Patents

Description

  The present application relates to a calculation device that simulates a change in the shape of a coaxial line, a calculation method using the calculation device, and a calculation program for realizing the calculation device.

  In an automobile wire harness, crimping of a terminal to an electric wire is widely used as a method for connecting the electric wire and the terminal. In recent years, the number of connected circuits has increased due to an increase in in-vehicle electrical components and higher functionality, and high reliability is required for connection.

  As a method for crimping a terminal, for example, in Patent Document 1, an electric wire is placed on a terminal piece, the terminal piece is bent into a U shape in cross-section, and then crimped using a jig, whereby the terminal is connected to the electric wire. An invention of a terminal crimping method for crimping is disclosed.

  In such a crimping process of the crimping method, an attempt has been made to shorten the development period by analyzing various simulation operations and the like.

  Moreover, in the electric wire used for a wire harness, a coaxial line may be used for the location which needs suppression of the high frequency noise by electromagnetic waves, such as radio reception.

JP 2006-351451 A

  However, when analyzing crimping on a coaxial line, the amount of computation for a large number of braided wires constituting the coaxial line becomes enormous. For example, when a simplified simulation model is set so as to reduce the amount of calculation, the change in shape when an external pressure is applied cannot be sufficiently simulated.

  The present invention has been made in view of such circumstances, and provides a calculation device, a calculation method, and a calculation program capable of imitating a shape change even when a simplified simulated coaxial line model is set. With the goal.

In the arithmetic device according to the present invention, the core wire is covered with a resin layer, and the shape change when pressure is applied from the outside to the coaxial wire in which the resin layer is covered with a braided wire obtained by braiding a plurality of strands. A virtual film that imitates a core wire, a resin layer that covers the core wire, and a braided wire that covers the resin layer, and stretches between a plurality of strands included in the braided wire core according to the simulated coaxial line model setting the resin layer, and a receiving means for receiving an input of braided wire and virtual Makuotto 's shape data and physical property data, core wire is receiving with means accepted, the resin layer, the braided wire and the virtual and forming means for forming the shape of the simulated coaxial line model based on the shape data of the film, based on the finite element method in which the forming means are formed shape and the receiving unit using the physical property data received, the simulated coaxial Is it external to the line model? Characterized in that it comprises a means for simulating pseudo calculating the change in shape when a pressure is applied.

  The arithmetic device according to the present invention further includes means for calculating a reduction rate of the radial cross-sectional area related to the simulated coaxial line model based on the result of the simulation calculation, and a shaft based on the calculated reduction rate of the cross-sectional area. Means for determining the tensile strength in the direction.

  The arithmetic device according to the present invention is characterized in that the virtual film formed based on the shape data is set between the resin layer and the braided wire and has a cylindrical shape inscribed in the braided wire.

  In the arithmetic device according to the present invention, the physical property data includes stiffness data indicating the hardness of the core wire, the resin layer, the braided wire, and the virtual membrane, and the hardness of the virtual membrane indicated by the stiffness data is equal to or less than the braided wire. It is characterized by.

In the calculation method according to the present invention, the core wire is covered with a resin layer, and the shape change when pressure is applied from the outside to the coaxial wire in which the resin layer is covered with a braided wire obtained by braiding a plurality of strands. In the calculation method for performing a simulation operation using an arithmetic device, the arithmetic device imitates a core wire, a resin layer covering the core wire, and a braided wire covering the resin layer, and a plurality of the braided wires are included in the braided wire. The core wire, the resin layer, the braided wire, and the virtual membrane, each of which receives a shape data and physical property data input related to a simulated coaxial line model in which a virtual membrane is stretched between the strands of the core wire, the received core wire, the resin layer, based on the shape data of the braid and the virtual layer to form a shape of the simulated coaxial line model, on the basis of the formed shape and the finite element method the property data using the accepted relative to the simulated coaxial line model, from the outside Change in shape when pressure is applied The characterized in that to simulate pseudo operation.

The arithmetic program according to the present invention is a computer program in which a core wire is covered with a resin layer, and the resin layer is coated with a braided wire obtained by braiding a plurality of strands. In a calculation program for simulating a change in shape, a core wire, a resin layer covering the core wire, and a braided wire covering the resin layer are imitated, and a plurality of strands included in the braided wire are stretched The core wire, the resin layer, the braided wire, and the virtual membrane received by the computer that received the input of the shape data and physical property data of the core wire, the resin layer, the braided wire, and the virtual membrane related to the simulated coaxial line model in which the virtual membrane is set of the procedure for forming the shape of the simulated coaxial line model based on the shape data, on the basis of the formed shape and the finite element method the property data using the accepted relative to the simulated coaxial line model, the external pressure The change in the shape of the case was example is characterized in that to execute a procedure to simulate pseudo operation.

  In the present invention, for example, a simplified simulation coaxial line model in which the number of strands included in the braided wire is reduced is simulated with high accuracy by imitating a change in shape when external pressure is applied. It is possible to calculate.

  The present invention uses a simulated coaxial line model that imitates a core wire, a resin layer that covers the core wire, and a plurality of braided wires that cover the resin layer, and that has a virtual membrane that stretches between the braided wires. Thus, for example, even for a simplified simulated coaxial line model that reduces the number of strands included in the braided wire, it is possible to perform a simulation operation that simulates a change in shape when external pressure is applied. It has excellent effects such as being possible. By using such a simulation calculation, for example, it is possible to develop various verifications such as determination of the tensile strength in the axial direction, and to shorten the development period.

It is sectional drawing which shows typically the coaxial line used as the object of the simulation calculation which concerns on the calculation method of this invention. It is an external view which shows the example of formation of the terminal member used as the object of the simulation calculation which concerns on the calculation method of this invention. It is explanatory drawing which shows the image which simulated the crimping | compression-bonding process used as the object of the simulation calculation which concerns on the calculation method of this invention. It is sectional drawing which shows typically the coaxial line and terminal member after crimping | compression-bonding used as the object of the simulation calculation which concerns on the calculation method of this invention. It is sectional drawing which shows the simulation coaxial line model used by the simulation calculation which concerns on calculation methods, such as this Embodiment. It is a perspective view which shows the simulation coaxial line model in this Embodiment etc. It is explanatory drawing which shows typically the result of the simulation calculation in this Embodiment etc. It is a block diagram which shows the structural example of the arithmetic unit of this invention. It is a flowchart which shows the arithmetic processing of the arithmetic unit of this invention. It is a schematic diagram which shows the constriction part of the coaxial line used with the calculating method of this invention. It is a graph which shows the characteristic regarding the cross-sectional area reduction | decrease rate of the constriction part used as the object of the calculation by the calculating method of this invention.

  Hereinafter, the present invention will be described in detail with reference to the drawings illustrating embodiments thereof. In wire harnesses used for communications in automobiles, coaxial lines (coaxial cables) are used in places where high-frequency noise suppression due to electromagnetic waves such as radio reception is required. The calculation method according to the embodiment of the present invention performs a simulation calculation (simulation) of a change in the shape of the coaxial line when a terminal is crimped to the coaxial line using a jig.

  FIG. 1 is a cross-sectional view schematically showing a coaxial line that is a target of a simulation calculation according to the calculation method of the present invention. In FIG. 1, reference numeral 1 denotes a coaxial line. The coaxial line 1 includes a copper core wire 10, an insulating resin layer 11 that covers the core wire 10, a copper braided wire 12 that covers the resin layer 11, and a braided wire. 12 and an insulating outer skin 13 covering 12. In addition, in FIG. 1, since the cross section of the coaxial wire 1 is typically shown, the core wire 10 is shown to be formed of a single copper wire, but with several to a dozen fine wires. Is formed. The braided wire 12 is obtained by braiding hundreds of strands, and the circular cross section included in the braided wire 12 shown in FIG. 1 indicates the cross section of the strand. In addition, in FIG. 1, since the cross section of the coaxial line 1 is shown typically, it is set as the description which abbreviate | omitted the number of strands.

  FIG. 2 is an external view showing an example of forming a terminal member that is a target of a simulation calculation according to the calculation method of the present invention. 2A and 2B show an example of the shape of the terminal member (barrel) 2 to be simulated. FIG. 2A shows the appearance of the terminal member 2 in a flat state before bending, and FIG. 2B shows the appearance of the terminal member 2 in a state where the coaxial wire 1 is bent so as to be crimped. The terminal member 2 shown in FIG. 2 has shown the example of the substantially cross shape which combined the rectangular caulking piece 21 with the substantially rectangular holding piece 20. These shapes can also be properly designed by using the calculation method of the present application.

  FIG. 3 is an explanatory diagram showing an image simulating a crimping process that is a target of a simulation calculation according to the calculation method of the present invention. FIG. 3A shows a crimping process using a crimping jig (crimping member) 3 having an anvil 30 and a crimper 31. In FIG. 3A, a crimping piece 21 of the terminal member 2 is fitted into a U-shaped groove portion provided in the anvil 30, the coaxial wire 1 is placed on the crimping piece 21, and a crimper 31 having a reverse U-shape in sectional view is mounted. It is the state pressed by. The anvil 30 and the crimper 31 are parts formed at the tip of the crimping jig 3 such as crimping pliers.

  Of the coaxial wire 1, the portion placed on the terminal member 2 requires an electrical connection between the braided wire 12 and the terminal member 2 because of the ground. 12 is exposed. Note that the coaxial line 1 shown in FIG. 3 shows a simulated coaxial line model used in a simulation calculation described later. In other words, the braided wire 12 is actually used that braids several hundreds of strands. However, if the simulation calculation is performed as it is, a very complicated operation is required, so the number of strands is reduced to a fraction. A simulated coaxial cable model with an increased diameter is also shown.

  From the state shown in FIG. 3A, the crimper 31 presses downward while winding the tip of the crimping piece 21 of the terminal member 2 bent upward. Then, by continuing to press downward, the crimper 31 bites into the anvil 30 and enters the state shown in FIG. 3B. Furthermore, the process of crimping the coaxial wire 1 to the terminal member 2 is completed by continuing the pressing by the anvil 30 and the crimper 31.

  FIG. 4 is a cross-sectional view schematically showing the coaxial wire 1 and the terminal member 2 after crimping that are the targets of the simulation calculation according to the calculation method of the present invention. FIG. 4 shows a state where pressing is continued from the state shown in FIG. 3B and the crimping is completed. Note that FIG. 4 is shown as an example of a simple schematic diagram, so the state inside the coaxial line 1 and the detailed state of the terminal member 2 are not drawn, but these states are not shown in the calculation method of the present invention. Needless to say, it is also possible to perform a simulated operation on the.

  Next, a simulated coaxial line model used in the simulation calculation in the present embodiment will be described. FIG. 5A shows a cross section of a simulated coaxial line model used for the simulation calculation according to the calculation method in the present embodiment. The simulated coaxial line model in the example of FIG. 5A is a model that assumes a virtual membrane 14 that stretches between a plurality of strands included in the braided wire 12. In the model of FIG. 5A exemplified in the present embodiment, a cylindrical virtual membrane 14 inscribed in the braided wire 12 braided in a cylindrical shape is set between the resin layer 11 and the braided wire 12. In the model, the virtual film 14 is fixed to each element wire included in the braided wire 12 at a contact point, for example. The contact point here may be a contact point in geometry, or may be an approximate point of a contact point set in calculation, and there may be two or more approximate points (nodes) on each strand. By connecting a node on one strand and a node on another strand, the virtual membrane can be stretched between the strands. The physical properties of the virtual film 14, particularly the rigidity data, are set to be the same material as the braided wire 12. Note that the hardness of the virtual film 14 indicated by the rigidity data is not necessarily the same as that of the braided wire 12, but is preferably equal to or less than the braided wire 12 and larger than the resin layer 11. The braided wire 12 is actually formed by knitting several hundreds of strands. However, when the model is set as it is, the calculation load is large and unsuitable for practical use. In order to reduce the load, a model reduced to a fraction of the number is used. FIG. 5B is a simulated coaxial line model shown for comparison and shows a model in which the virtual film 14 is not set.

  FIG. 6 is a perspective view showing a simulated coaxial line model in the present embodiment and the like. FIG. 6A is a perspective view showing a part of the part related to the braided wire 12 and the virtual membrane 14 in the simulated coaxial line model shown in FIG. 5A. Note that FIG. 6B is a model that does not assume the virtual membrane 14 shown for comparison, and a part of the portion related to the braided wire 12 in the simulated coaxial line model shown in FIG. 5B is shown as a perspective view. is there.

  In the calculation method in the present embodiment using the simulated coaxial line model shown in FIG. 5 and FIG. 6, the shape of the coaxial line 1 that changes due to crimping can be obtained by a simulated calculation based on the Finite Element Method (FEM). By estimation, analysis such as prediction of the disconnection strength of the coaxial line 1 is performed. That is, it is possible to analyze a phenomenon such as a tensile strain generated in the coaxial wire 1 at the time of crimping, a decrease in the wire diameter due to pressurization, etc. It tries to shorten the development period by estimating and analyzing not suitable crimping conditions by simulation.

  However, if a simulation operation based on the finite element method is performed on the deformation of the shape at the time of crimping using the simulated coaxial line model without a film as shown in FIGS. 5B and 6B for comparison, it may actually occur. There is a problem in that no deformation occurs and sufficient analysis results cannot be obtained. This cause is caused by the simplification of the configuration of the braided wire 12, and is caused by analysis due to a difference in rigidity between the resin-made part and other parts. In the simulated coaxial line model shown in FIG. 5A and FIG. 6A, by assuming a virtual membrane 14 having the same rigidity as that of the braided wire 12, it is possible to prevent the problem in this analysis, resulting in high accuracy. This makes it possible to realize simple simulation operations.

  FIG. 7 is an explanatory diagram schematically showing the result of the simulation calculation in the present embodiment and the like. FIG. 7A shows the result of the simulation operation for the crimping process using the simulated coaxial line model shown in FIG. 5A and FIG. 6A as an image of the cross section of the coaxial line 1. FIG. 7B shows an image related to the result of using the simulated coaxial line model without a film in FIGS. 5B and 6B for comparison. 7A and 7B show the deformation of the cross section of the coaxial line 1 without displaying the terminal member 2 in order to easily understand the difference due to the presence or absence of the virtual film 14.

  First, the simulated coaxial line model of FIG. 7B in which the virtual film 14 is not set will be described. In the simulated coaxial line model shown in FIG. 7B, the deformed resin layer 11 protrudes from the gap between the strands included in the braided wire 12 due to external pressure during crimping. This is because, as a result of using a simulated coaxial line model in which the number of strands knitting the braided wire 12 is reduced, the gap between the strands becomes relatively large, and the resin layer 11 is deformed by pressurization during crimping. This is due to excessive deformation of the resin to be protruded from the gap between the strands. In the actual coaxial line 1, since the number of strands that braid the braided wire 12 is large and the strand diameter is small, the strands are braided more densely than the simulated coaxial line model. Therefore, the deformation that the resin constituting the resin layer 11 protrudes from the gap between the strands is difficult to occur.

  On the other hand, in the simulated coaxial line model shown in FIG. 7A, the virtual film 14 that stretches between the strands prevents the gap between the strands from excessively spreading, and the resin of the resin layer 11 protrudes. In addition to suppressing such deformation, it also serves as a direct defense wall so that the resin does not protrude. Therefore, for the simulated coaxial line model in which the virtual membrane 14 according to the calculation method of the present invention shown in FIG. 7A is set, the calculation close to the actual situation is simulated while reducing the number of strands of the braided wire 12. Is possible. It should be noted that both the braided wire 12 and the virtual membrane 14 are necessary for the appropriate reproduction of reality. If only the virtual film 14 is used, the deformation during pressurization cannot be expressed appropriately. As described above, the hardness of the virtual film 14 is preferably less than the braided wire 12 and greater than the resin layer 11. This is because if the hardness of the virtual film 14 is greater than that of the braided wire 12, the deformation of the braided wire 12 and the like deviates from the reality, and if it becomes the resin layer 11 or less, the protrusion of the resin cannot be suppressed.

  As described above, in the calculation method according to the present invention, it is possible to perform a simulated calculation with high accuracy while actually reducing the calculation load while practically reducing the calculation load. Then, the shape change of the coaxial wire 1, for example, the reduction rate of the cross-sectional area is calculated from the result of the simulation calculation, and the expansion to various uses such as determination of the tensile strength in the axial direction is performed using the calculated reduction rate of the cross-sectional area as an index Is possible.

  Next, an implementation example of the calculation method of the present invention will be described. FIG. 8 is a block diagram showing a configuration example of the arithmetic device according to the present invention. In FIG. 8, reference numeral 100 denotes an arithmetic device such as a computer. The arithmetic device 100 includes at least a control unit 101, a recording unit 102, a storage unit 103, an input unit 104, and an output unit 105.

  The control unit 101 is an arithmetic mechanism such as a CPU (Central Processing Unit) that controls the entire apparatus. The control unit 101 is connected to each hardware unit in the arithmetic device 100 via an internal communication line, and executes predetermined processing according to the procedure of various programs such as the arithmetic program 200 of the present invention.

  The recording unit 102 is a recording mechanism such as a magnetic recording mechanism such as an HDD (Hard Disk Drive) or a non-volatile semiconductor recording mechanism such as an SSD (Solid State Disk). The recording unit 102 stores various information such as a program (execution file) such as the arithmetic program 200 of the present invention and data.

  The storage unit 103 is a volatile storage mechanism such as a RAM (Random Access Memory) that stores information temporarily generated in the calculation process of the control unit 101.

  The input unit 104 is a man-machine interface mechanism configured as a mechanism for receiving a user operation, such as a mouse, a keyboard, an attached circuit thereof, and an attached program.

  The output unit 105 is a man-machine interface mechanism configured as a mechanism for a monitor, a printer, an attached circuit thereof, an attached program, and the like.

  The computer configured as described above reads out the arithmetic program 200 recorded in the recording unit 102, stores it in the storage unit 103, and executes it under the control of the control unit 101, whereby the arithmetic device 100 of the present invention is obtained. Function.

  Next, processing of the arithmetic device 100 of the present invention will be described. FIG. 9 is a flowchart showing the arithmetic processing of the arithmetic device 100 according to the present invention. The arithmetic device 100 executes various procedures included in the arithmetic program 200 under the control of the control unit 101. That is, for example, the control unit 101 receives input of shape data used for the simulation calculation from the input unit 104 (step S1). And the control part 101 forms the shape of the simulation coaxial line model of the coaxial line 1, the terminal member 2, and the crimping | compression-bonding member 3 used as the object of simulation calculation based on the received shape data (step S2). The shape data received in step S1 is data for indicating the shape of the member to be simulated for the coaxial line 1, the terminal member 2, the crimp member 3 and the like as a set of meshes having sizes and shapes determined as appropriate. It is. The coaxial line 1 related to the input shape data is a simulated coaxial line model including a core wire 10, a resin layer 11, a braided wire 12, and a virtual membrane 14. The input of various data such as shape data is not limited to manual input, and may be shape data recorded on a recording medium, input from another device via a communication line, The data may be data for correcting or changing the data.

  For example, the control unit 101 receives input of physical property data used for the simulation calculation from the input unit 104 (step S3). The physical property data received in step S3 includes, for example, stiffness data such as elastic data and plasticity data as physical property data for the coaxial line 1 and the terminal member 2, and the elastic data includes, for example, Young's modulus and Poisson's ratio. And other physical property values. Each physical property data is inputted with a value for each member, but the same physical property data is used for the braided wire 12 and the virtual membrane 14 to have the same rigidity. However, as described above, the hardness of the virtual film 14 indicated by the rigidity data is preferably equal to or less than the braided wire 12 and larger than the resin layer 11. Note that the crimping member 3, that is, the crimping jig 3 having the anvil 30 and the crimper 31 is modeled as a rigid body that does not deform at all, and therefore it is possible to omit the input of physical property data.

  For example, the control unit 101 receives input of terminal finish height data from the input unit 104 (step S4). In step S4, input of data indicating the terminal finish height (C / H [mm]) is accepted as a completion condition of the crimping process. In general, if the terminal finished height is too low, the terminal is excessively pressed, and disconnection is likely to occur. On the other hand, when the terminal finish height is too high, the coaxial line 1 and the terminal member 2 are not sufficiently adhered, and the coaxial line 1 is easily disconnected.

  Based on the finite element method using the shape based on the shape data, the physical property data, and the terminal finish height data, the control unit 101 executes a simulation operation for calculating a change in the shape of the simulated coaxial line model (step S5). In the simulation operation in step S5, the change of each element indicated by the mesh formed based on the shape and physical properties is represented by the stiffness equation indicated by the stiffness matrix [K], the displacement vector {δ}, and the force vector {P}. It is executed by calculating by a simulation operation based on the finite element method using {P} = [K] {δ}.

  The control unit 101 derives the result of the simulation calculation as a change in the cross-sectional area of the image and the coaxial line 1 (step S6). In the crimping process, the coaxial wire 1 connected to the terminal member 2 is pressed around the crimping portion via the resin, so that the cross-sectional area is reduced, so-called “necking” occurs. In step S6, the reduction rate of the cross-sectional area of the constricted portion where the constriction occurs is defined by the following formula 1, and used as an index for evaluating the disconnection strength against the tensile force in the axial direction.

DS (%) = (S0−S1) / S0 (1)
DS (Decrease of Sectional area): Cross-sectional area reduction rate
S0: Initial sectional area
S1: Cross-sectional area of the constricted part after crimping

  The control unit 101 compares the calculated reduction rate of the cross-sectional area of the twisted part indicating the change of the cross-sectional area, which is one of the simulation results, with a predetermined threshold value set in advance (step S7). The simulation result and the comparison result are output from the output unit 105 (step S8). The result of the simulation operation is output, for example, as an image showing the coaxial line 1 after crimping and a numerical value showing the reduction rate of the cross-sectional area. Further, together with a numerical value indicating the reduction rate of the cross-sectional area, an evaluation result indicating whether the disconnection strength is good or defective based on a result of comparison with a predetermined threshold is output. In this way, arithmetic processing is executed.

  Next, the disconnection strength evaluated based on the result of the simulation calculation will be described. FIG. 10 is a schematic diagram showing a constricted portion of the coaxial line 1 used in the calculation method of the present invention. FIG. 10 is a schematic diagram for explaining the reduction rate of the cross-sectional area derived in step S6 of the arithmetic processing, and the constricted portion 15 is generated in the coaxial line 1 by the crimping process. Then, as shown by the above-described equation 1, the cross-sectional area reduction rate DS (%) can be derived from the initial cross-sectional area S0 and the cross-sectional area S1 of the constricted portion 15.

  FIG. 11 is a graph showing characteristics relating to the cross-sectional area reduction rate of the constricted portion 15 to be calculated by the calculation method of the present invention. FIG. 11 shows the relationship with the disconnection strength [N] of the coaxial line 1 on the horizontal axis and the cross-sectional area reduction rate DS (%) of the constricted portion 15 on the vertical axis. FIG. 11 shows the relationship between the reduction rate of the cross-sectional area derived by the simulation calculation and the disconnection strength of the crimped coaxial line 1 created under the conditions based on the simulation coaxial line model subjected to the simulation calculation. Yes. The disconnection strength of the coaxial line 1 indicates the strength at which the disconnection occurs when the terminal member 2 is fixed and the coaxial line 1 is pulled with a specific force. As shown in FIG. 11, since there is a correlation between the reduction rate of the cross-sectional area and the disconnection strength, the reduction rate of the cross-sectional area is used as an index regarding the disconnection strength for the virtual coaxial line model in the arithmetic processing. Can do. Further, when the reduction rate of the cross-sectional area is compared with a predetermined threshold value determined appropriately, the disconnection strength is good when the reduction rate is lower than the threshold value, and it can be evaluated that it is bad when the reduction rate is high. In this way, the calculation method of the present application is executed.

  The form shown in the above-described embodiment is only a part of the infinite number of examples of the present application, and can be widely applied to the calculation by setting a virtual film that does not actually exist in the simulation calculation of the coaxial line. Is possible. For example, in the above-described embodiment, the virtual film set between the resin layer and the braided wire and inscribed in the braided wire is shown. However, a plurality of strands included in the braided wire are stretched. Other forms may be used as long as the virtual film is set. Specifically, a virtual membrane that connects the central axes of the strands may be set for each strand, or a virtual membrane that circumscribes the braided wire may be set. However, if the resin layer and the virtual membrane are separated from each other before pressurization, the resin tends to protrude (deform excessively) by the distance. For this reason, it is preferable to set a virtual film on the outer surface of the resin layer as described above. For the purpose of suppressing (constraining) the spread between the strands, it can be developed in various forms such as setting a virtual spring that stretches between the strands. However, in order to appropriately reproduce the actual situation, the contribution of covering the portion having no braided wire on the outer surface of the resin layer with the virtual film is greater than restraining the spread between the strands.

  Furthermore, for example, it is possible to use parameters other than the above-described embodiment, it is also possible to use for evaluations other than the disconnection strength, and as a mounting form, a form that is distributed and executed by a plurality of computers, It is possible to develop into various forms such as a form provided as an ASP.

DESCRIPTION OF SYMBOLS 1 Coaxial wire 10 Core wire 11 Resin layer 12 Braided wire 13 Outer skin 14 Virtual film 15 Constricted part 2 Terminal member 20 Holding piece 21 Caulking piece 3 Crimping jig (crimping member)
30 anvil 31 crimper 100 arithmetic device 101 control unit 102 recording unit 103 storage unit 104 input unit 105 output unit 200 calculation program

Claims (6)

In an arithmetic unit that coats a core wire with a resin layer, and simulates a change in shape when pressure is applied from the outside to a coaxial wire that is covered with a braided wire obtained by braiding a plurality of strands,
A simulated coaxial line model that imitates a core wire, a resin layer that covers the core wire, and a braided wire that covers the resin layer, and sets a virtual membrane that stretches between a plurality of strands included in the braided wire Receiving means for receiving input of shape data and physical property data of each of the core wire, the resin layer, the braided wire, and the virtual membrane ;
Core wire receiving with unit receives, resin layer, and forming means for forming the shape of the simulated coaxial line model based on the shape data of the braid and the virtual layer,
Based on the finite element method in which the forming means forms the shape and the reception unit using the physical property data received, with respect to the simulated coaxial line model mimics pseudo calculating the change in shape when a pressure is applied from the outside An arithmetic device comprising: means. Furthermore,
Based on the result of the simulation operation, means for calculating the reduction rate of the radial cross-sectional area related to the simulation coaxial line model,
The arithmetic unit according to claim 1, further comprising: means for determining a tensile strength in the axial direction based on the calculated reduction rate of the cross-sectional area.   The computing device according to claim 1, wherein the virtual film formed based on the shape data has a cylindrical shape that is set between the resin layer and the braided wire and is inscribed in the braided wire. The physical property data includes stiffness data indicating the hardness of the core wire, the resin layer, the braided wire, and the virtual membrane,
The computing device according to any one of claims 1 to 3, wherein the hardness of the virtual film indicated by the rigidity data is equal to or less than the braided line. Using an arithmetic unit, the core wire is covered with a resin layer, and the resin layer is coated with a braided wire made by braiding a plurality of strands. In the calculation method to calculate,
The arithmetic unit is:
A simulated coaxial line model that imitates a core wire, a resin layer that covers the core wire, and a braided wire that covers the resin layer, and sets a virtual membrane that stretches between a plurality of strands included in the braided wire Accepts input of shape data and physical property data of the core wire, resin layer, braided wire and virtual membrane ,
Accepted core, a resin layer, the shape of the simulated coaxial line model formed based on the shape data of the braid and the virtual layer,
Calculation method forming shape and based on the received physical property data finite element method using, with respect to the simulated coaxial line model, characterized by simulating pseudo calculating the change in shape when a pressure is applied from the outside. Calculation that simulates a change in shape when pressure is applied from the outside to a coaxial wire in which a core wire is covered with a resin layer and the resin layer is covered with a braided wire formed by braiding a plurality of strands. In the program
A simulated coaxial line model that imitates a core wire, a resin layer that covers the core wire, and a braided wire that covers the resin layer, and sets a virtual membrane that stretches between a plurality of strands included in the braided wire To the computer that received the input of the shape data and physical property data of the core wire, the resin layer, the braided wire, and the virtual membrane ,
A step of forming the shape of the simulated coaxial line model accepted core, a resin layer, based on the shape data of the braid and the virtual layer,
Formed shape and based on the received physical property data finite element method using the relative simulated coaxial line model, characterized in that to execute a procedure to simulate pseudo calculating the change in shape when a pressure is applied from the outside An arithmetic program.

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