Simulation method and system for fishing rod design

Abstract

The invention discloses a fishing rod design simulation method, which comprises the following steps: acquiring input information which at least comprises one of material information, mold information, laying layer information and load information of a target fishing rod; equivalence is carried out according to the input information, the variable cross-section structure of the target fishing rod is equivalent to multiple sections of constant cross-section structures arranged in sequence, and the geometric dimension and mechanical information of each section of constant cross-section structure are obtained; deformation displacement of different parts of the target fishing rod is obtained through calculation, and a tonality curve simulation result of the target fishing rod is obtained; by converting the design of the fishing rod into systematic calculation, a sufficient and effective theoretical design basis is provided for engineers in the early stage of design, blind tests based on experience are not needed, and the number of times of trial and error is reduced, so that the corresponding mold development cost, the design time and the consumption of manufacturing raw materials are reduced, the research and development period is greatly shortened, and the research and development efficiency is improved; parameters and settings commonly used in the fishing rod design process are adopted, and the method is easy and fast to operate.

Description

Technical Field

[0001] The invention relates to data processing technology, and in particular to a simulation method and system for fishing rod design. Background Art

[0002] A fishing rod is a fishing tool that is shaped like a long, thin rod with multiple sections. It usually has a handle that tapers from the handle to the back end and is used with a fishing line connected to a baited hook. Fishing rods were originally used by humans to make a living by fishing. Now they are commonly used for fishing leisure in outdoor sports, and are also used in some fishing competitive sports or outdoor competitions.

[0003] In fishing, understanding the tonality curve of the fishing rod is crucial for choosing the right fishing rod, fishing group and fish hook. For this reason, manufacturers will design various fishing rods with different tonality to supply fishing enthusiasts with different needs. Due to the different physical parameters of each part of the carbon fiber fishing rod, R&D personnel need to redefine the parameters of each part of the fishing rod during design, prepare samples and conduct repeated tests, and in the process of sample production, mold development, fishing rod design, and raw materials all require a lot of time and cost, and the tonality curve of the sample needs to go through multiple versions of design to obtain products that meet the requirements. In addition, after the first generation is launched, it will be updated and iterated later, which greatly consumes manpower and material resources. Therefore, it is necessary to propose a new solution to solve the above problems. Summary of the invention

[0004] In view of this, the present invention aims to address the deficiencies in the prior art, and its main purpose is to provide a simulation method and system for fishing rod design, which can effectively and quickly design the tonality curve of the fishing rod and simultaneously verify whether the design scheme is feasible.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A simulation method for fishing rod design comprises the following steps:

[0007] Acquiring input information, the input information including at least one of material information, mold information, layer information, and load information of the target fishing rod;

[0008] Based on the input information, the variable cross-section structure of the target fishing rod is equivalent to multiple sections of constant cross-section structures arranged in sequence, and the geometric dimensions and mechanical information of each section of the constant cross-section structure are obtained at the same time;

[0009] Calculate and obtain the deformation displacement of different parts of the target fishing rod, and obtain the tonality curve simulation result of the target fishing rod;

[0010] The calculation process is as follows:

[0011] When the fishing rod is placed horizontally and the large end is fixed, and a concentrated load P is applied to the small end, each constant cross-section structure is provided with three points, namely, point A, point B, and point C in the direction from the large end to the small end;

[0012] The maximum deformation displacement formed by the constant cross section is H, H = H1 + H2 + H3 + H4;

[0013] Among them, H1 is the displacement caused by the load acting on point C when point B is fixed; H2 is the displacement caused by the load acting on point B when point A is fixed, and the angle caused by the alignment is θ1; H3 is the displacement caused by the bending moment acting on point B, and the angle caused by the alignment is θ2; H4 is the displacement caused by the rotation of the section at point B.

[0014] As a preferred solution, the calculation formulas of H1, H2, H3, H4, θ1 and θ2 are as follows:

[0015]

[0016]

[0017] As a preferred solution, the calculation formula for the strength of the fishing rod blank is:

[0018]

[0019] D is the outer diameter, d is the inner diameter, i and j are d(i, j) is a two-dimensional directional sample in the sample space, and i and j are the positioning coordinates.

[0020] As a preferred solution, the material information at least includes material type, material name, normal axis modulus component T ij , axial elastic modulus E L , transverse elastic modulus E T , shear modulus G LT , transverse Poisson's ratio v T , axial Poisson's ratio v L , one of the fishing rod wall thicknesses h.

[0021] As a preferred solution, the mold information at least includes the model of the mold.

[0022] As a preferred solution, the ply information at least includes the patch position, material name, W1, W2, W3, L1, and L2.

[0023] As a preferred solution, the load information at least includes the fishing weight.

[0024] A system that runs the aforementioned simulation method for fishing rod design to perform calculations.

[0025] Compared with the prior art, the present invention has obvious advantages and beneficial effects. Specifically, it can be seen from the above technical solution that:

[0026] By converting the design of the fishing rod into a systematic calculation, a sufficiently effective theoretical design foundation is provided to engineers in the early stage of design. There is no need to blindly conduct experiments based on experience, which reduces the number of trial and error, thereby reducing the corresponding mold development cost, design time, and consumption of raw materials. The R&D cycle is greatly shortened and R&D efficiency is improved. In addition, the parameters and settings commonly used in the fishing rod design process are used, which makes it easy and quick to get started.

[0027] In order to more clearly illustrate the structural features and effects of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments: BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a design principle diagram of the present invention, which shows the relationship between the parameters of W1, W2, W3, L1, and L2;

[0029] Figure 2 is a partial schematic diagram of an input module of the system of the present invention, which displays the input portion of material information, mold information, layer information and load information;

[0030] Figure 3 It is a schematic diagram of the deformation of the fishing rod due to force;

[0031] Figure 4 It is a schematic diagram of the constant cross-section structure of the present invention;

[0032] Figure 5 It is a fishing curve diagram of a certain design scheme in the present invention. DETAILED DESCRIPTION

[0034] The present invention discloses a method for simulating the design of a fishing rod, comprising the following steps:

[0035] Acquiring input information, the input information including at least one of material information, mold information, layer information, and load information of the target fishing rod;

[0036] Based on the input information, the variable cross-section structure of the target fishing rod is equivalent to multiple sections of constant cross-section structures arranged in sequence, and the geometric dimensions and mechanical information of each section of the constant cross-section structure are obtained at the same time;

[0037] Calculate and obtain the deformation displacement of different parts of the target fishing rod, and obtain the tonality curve simulation result of the target fishing rod;

[0038] The calculation process is as follows:

[0039] When the fishing rod is placed horizontally and the large end is fixed, a concentrated load P is applied to the small end. Figure 2 Each constant cross-section structure has three points, A, B, and C in order from the large end to the small end. For details, see Figure 3 ;

[0040] The maximum deformation displacement formed by the constant cross section is H, H = H1 + H2 + H3 + H4;

[0041] Among them, H1 is the displacement caused by the load acting on point C when point B is fixed; H2 is the displacement caused by the load acting on point B when point A is fixed, and the angle caused by alignment is θ1; H3 is the displacement caused by the bending moment acting on point B, and the angle caused by alignment is θ2; H4 is B The displacement formed by the cross-sectional rotation of the point; specifically, the calculation formulas and derivation processes of H1, H2, H3, H4, θ1 and θ2 are as follows:

[0042] Assume that the moment of inertia of surface A is I1 and the moment of inertia of surface B is I2; the equation of the deflection curve at the x position from point B is:

[0043]

[0044] Integrate successively and combine the boundary conditions to get

[0045]

[0046] Similarly, to find H2, take

[0047]

[0048] The equation of the deflection curve at the x position from point A is:

[0049]

[0050] Using the boundary condition: x = 0, we get C1 and C2 and substituting them back into the expression y, we get

[0051] H4 is the additional displacement of C caused by θ1 and θ2,

[0052]

[0053] H=H1+H2+H3+H4 can be understood as H is the sum of 4 function equations, which makes the function graph of H more accurate and closer to the actual situation of the fishing rod. At the same time, during the design process, if there is a problem with the function value of one of the functions H1, H2, H3, and H4, it will cause a significant deviation in the function graph of H. At this time, engineers can more intuitively observe from the function graph of H that their design scheme is not feasible. In addition, a, b, and c are all parameter variables. More parameter variables can make the function graph more accurate, minimize errors, and avoid the situation where a design scheme is feasible according to the display of the function graph, but in fact a certain design scheme is not feasible, which will cause the rod body to break, further reducing the cost of trial and error.

[0054] The strength of the fishing rod blank material σ is determined by the elastic modulus and the moment of inertia of the section, as known from material mechanics. Therefore, the calculation formula for the strength of the fishing rod blank material is:

[0055]

[0056] D is the outer diameter, d is the inner diameter, i and j are d(i, j) is a two-dimensional directional sample in the sample space, i and j are the positioning coordinates; in the fishing rod design, there are only 0° cloth and 90° cloth, so the eccentric modulus component Just consider these two directions

[0057] When θ=90°,

[0058]

[0059] T 21 =(1-v T *v L ) -1 *v L E T ;

[0060] When θ=0°,

[0061]

[0062] Among them, T ij is the positive axis modulus component, E L is the axial elastic modulus, E T is the transverse elastic modulus, G LT is the shear modulus, v T is the transverse Poisson’s ratio, v L is the axial Poisson's ratio, and h is the wall thickness of the fishing rod.

[0063] And, the material information at least includes material type, material name, positive axis modulus component T ij , axial elastic modulus E L, transverse elastic modulus E T , shear modulus G LT , transverse Poisson's ratio v T , axial Poisson's ratio v L , one of the following: the mold information includes at least the mold model; the load information includes at least the fishing weight; the layer information includes at least the patch position, material name, W1, W2, W3, L1, L2. The existing carbon fiber fishing rods are all rolled with carbon fiber cloths of different shapes. In order to facilitate data processing, the prototype figure is set to a rectangle, and the shape of the carbon fiber cloth is redefined by the five-point positioning method, so that the standard definition of the carbon fiber cloth is more intuitive and clear, and the design is more convenient. It has a good guiding role when used in conjunction with the calculation method of the present invention. Specifically, the prototype figure, when the corresponding side length is zero, becomes the "three original cloths" of the fishing rod design cloth. On this basis, more different cloth pieces are obtained by extending through mirroring in different directions. The meanings of the parameters W1, W2, W3, L1, and L2 are detailed in Figure 1 .

[0064] The present invention also discloses a system that runs the aforementioned simulation method for fishing rod design to perform calculations.

[0065] The method of use of the present invention is described in detail as follows:

[0066] Engineers can try to modify the corresponding parameters in the input module of the system. The fishing rods designed according to the relevant parameters will show different tonality and strength. The tonality and strength can be intuitively seen by observing the function graph. The tonality mainly depends on the curve and height, and the strength mainly depends on whether the strength curve is smooth. If there is a sudden sharp drop in a certain area, it can be judged that the position is a breakpoint and there is an abnormality. The design parameter solution is not feasible and a new round of parameter modification is required.

[0067] The design focus of the present invention is: by converting the design of the fishing rod into a systematic calculation, a sufficiently effective theoretical design basis is provided to engineers in the early stage of the design, without the need to blindly conduct experiments based on experience, thereby reducing the number of trial and error, thereby reducing the corresponding mold development cost, design time, and consumption of raw materials, greatly shortening the research and development cycle, and improving research and development efficiency. In addition, the parameters and settings commonly used in the fishing rod design process are used, and getting started is simple and quick.

[0068] The above description is only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any slight modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A method for simulating fishing rod design, characterized in that: The following steps are involved: Acquiring input information, the input information including at least one of material information, mold information, layer information, and load information of the target fishing rod; Based on the input information, the variable cross-section structure of the target fishing rod is equivalent to multiple sections of constant cross-section structures arranged in sequence, and the geometric dimensions and mechanical information of each section of the constant cross-section structure are obtained at the same time; Calculate and obtain the deformation displacement of different parts of the target fishing rod, and obtain the tonality curve simulation result of the target fishing rod; The calculation process is as follows: When the fishing rod is placed horizontally and the large end is fixed, and a concentrated load P is applied to the small end, each constant cross-section structure is provided with three points, namely, point A, point B, and point C in the direction from the large end to the small end; The maximum deformation displacement formed by the constant cross section is H, H = H1 + H2 + H3 + H4; Among them, H1 is the displacement caused by the load acting on point C when point B is fixed; H2 is the displacement caused by the load acting on point B when point A is fixed, and the angle caused by the alignment is θ1; H3 is the displacement caused by the bending moment acting on point B, and the angle caused by the alignment is θ2; H4 is the displacement caused by the rotation of the section at point B.

2. The method for simulating fishing rod design according to claim 1, characterized in that: The calculation formulas of H1, H2, H3, H4, θ1 and θ2 are as follows:

3. The method for simulating fishing rod design according to claim 1, characterized in that: The calculation formula for the strength of the fishing rod blank is: D is the outer diameter, d is the inner diameter, i and j are d(i,j) is a two-dimensional directional sample in the sample space, and i and j are the positioning coordinates.

4. The method for simulating fishing rod design according to claim 1, characterized in that: The material information at least includes material type, material name, positive axis modulus component T ij , axial elastic modulus E L , transverse elastic modulus E T , shear modulus G LT , transverse Poisson's ratio v T , axial Poisson's ratio v L , one of the fishing rod wall thicknesses h.

5. The method for simulating fishing rod design according to claim 1, characterized in that: The mold information at least includes the model of the mold.

6. The method for simulating fishing rod design according to claim 1, characterized in that: The ply information at least includes the patch position, material name, W1, W2, W3, L1, and L2.

7. The method for simulating fishing rod design according to claim 1, characterized in that: The load information at least includes the fishing weight.

8. A system, characterized in that: It runs the simulation method of fishing rod design described in any one of claims 1-7 for calculation.

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