Numerical Simulation-Based Calculation Method for Variable Blade Shape of Speed Skating Blades

Abstract

A numerical simulation-based variable calculation method for the shape of speed skating blades is disclosed, including: constructing a three-dimensional solid model of the blade; importing the three-dimensional solid model of the blade into finite element mesh generation software to perform mesh generation for each part of the blade and ice mesh construction, and establishing a speed skating blade-ice mesh model; setting the mutual relationships of each part of the blade in the finite element mesh generation software, establishing frictional contact between the blade edge and the ice surface, assigning material properties to each part of the blade and the ice, setting motion coupling constraints and fixed boundary conditions, applying a pushing force and a pushing direction, and performing analysis step settings, and finally creating an output file; importing the output file of the finite element mesh generation software into finite element numerical simulation software to perform deformation calculation of the blade. The present invention can accurately simulate the actual situation of the blade deformation during speed skating, and provide guidance for the technical movements and strength exertion of speed skating athletes.

Description

Technical Field

[0001] The present invention belongs to the technical field of structural mechanics and its numerical simulation, and particularly relates to a method for quantitatively calculating the deformation of a speed skating blade based on numerical simulation. Background Art

[0002] The ice blade is the basic equipment for speed skating. During speed skating, the deformation of the ice blade will directly affect the technical movements of the athlete, the exertion of strength, and the sports performance. The speed skating blade consists of five parts: the blade bridge, the front bracket, the support seat, the blade tube, and the blade. With the development of new material technologies, the materials of each part of the speed skating blade are constantly updated and optimized, promoting the continuous improvement of the performance of the ice blade. The forward driving force during speed skating comes from the pushing force generated by the athlete pushing the ice backward to the left or right. The ice blade material, the pushing force, and the pushing angle will affect the deformation of the ice blade during speed skating, and the deformation of the ice blade has a greater impact on the technical movements of the athlete, the exertion of strength, and the sports performance. Therefore, how to quantitatively analyze the deformation of the ice blade during speed skating is an important issue faced by the current research on the selection of speed skating blade materials and the optimization of pushing techniques.

[0003] At present, there is an extremely lack of theoretical research and practical experience on the deformation characteristics of speed skating blades. On the one hand, the materials used for each part of the speed skating blade, such as the blade bridge, the front bracket, the support seat, the blade tube, and the blade, are not the same. When studying the influence of material properties on the deformation of the speed skating blade, it is necessary to first develop a variety of materials for each part of the ice blade, then combine and match various materials to manufacture a real speed skating blade, and then carry out an analysis of the influence of materials on the deformation of the speed skating blade. This process requires a lot of time to debug the process parameters of each part of the material, with low efficiency. On the other hand, the deformation amount of the speed skating blade is small, and during speed skating, the athlete will use a variety of pushing postures to push the ice. In reality, it is impossible to collect in real time the small deformation amount of the ice blade caused by various pushing forces and pushing angles when the athlete is skating at high speed, so it is impossible to carry out a quantitative analysis of the deformation of the speed skating blade during the athlete's movement process. Summary of the Invention

[0004] The present invention discloses a method for quantitatively calculating the deformation of a speed skating blade based on numerical simulation, which realizes the quantification of the deformation of the speed skating blade, can systematically study the deformation characteristics of the speed skating blade under different ice blade materials, different pushing forces, and different pushing angles, and provides theoretical and technical support for significantly improving the mechanical performance of the speed skating blade and comprehensively improving the efficiency of speed skating.

[0005] According to one aspect of the embodiments of the present invention, a method for quantitatively calculating the deformation of a speed skating blade based on numerical simulation is provided, including:

[0006] Using 3D modeling software to model the blade bridge, the front bracket, the support seat, the blade tube, and the blade of the ice blade to construct a 3D solid model of the ice blade;

[0007] Import the established three-dimensional solid model of the ice skate blade into the finite element mesh generation software. Use the finite element mesh generation software to perform mesh generation for each part of the ice skate blade and construct the ice mesh, and establish a speed skating blade-ice mesh model. When performing mesh generation for each part of the speed skating blade, cut the bridge, front bracket, support seat, and blade entities of the ice skate blade into several elements, and clean the geometric model. Then perform hexahedral mesh generation to obtain a regular hexahedral solid mesh model of the bridge, front bracket, support seat, and blade. Arrange regular triangular meshes on the surface of the pipe of the ice skate blade, and then perform tetrahedral solid mesh generation for the pipe. After the tetrahedral solid mesh generation is completed, delete the triangular meshes on the surface of the pipe to obtain a tetrahedral solid mesh model of the pipe of the ice skate blade;

[0008] Set the mutual relationships among the bridge, front bracket, support seat, pipe, and blade of the ice skate blade in the finite element mesh generation software, establish the frictional contact between the blade edge of the ice skate blade and the ice surface, endow the bridge, front bracket, support seat, pipe, blade of the ice skate blade, and ice with material properties, set the motion coupling constraints and fixed boundary conditions, apply the pushing force and the pushing direction, and perform the setting of the analysis step. Finally, create an output file;

[0009] Import the output file of the finite element mesh generation software into the finite element numerical simulation software to perform the deformation calculation of the ice skate blade, and obtain the deformation nephogram of each part of the ice skate blade and the deformation characteristics of any local part or component of the speed skating blade.

[0010] In some examples, the ice mesh construction method includes:

[0011] Find the surface mesh of the ice skate blade from the hexahedral solid mesh of the ice skate blade, delete the side and upper surface meshes of the ice skate blade, retain the blade surface mesh in the part where the ice skate blade contacts the ice surface, and separate the blade surface mesh from the hexahedral solid mesh of the ice skate blade;

[0012] Based on the blade surface mesh, horizontally offset the nodes of the blade surface mesh to form the surface where the blade contacts the ice, that is, the width of the ice, and at the same time re-arrange regular quadrilateral meshes with the meshes as units to complete the layout of the surface mesh of the ice;

[0013] Perform the offset of the surface mesh of the ice to form a hexahedral solid mesh of the ice, and then delete the surface quadrilateral meshes of the ice and only retain the hexahedral solid mesh of the ice to complete the establishment of the hexahedral mesh model of the ice.

[0014] In some examples, the contact between the bridge and the front bracket, the bridge and the support seat, the front bracket and the pipe, the support seat and the pipe, and the pipe and the blade is a bonded contact.

[0015] In some examples, a 6-degree-of-freedom motion coupling constraint is imposed on the front connection hole and the rear connection hole of the skates connected by the knife bridge, the front bracket and the knife tube, and the support seat and the knife tube; a 6-degree-of-freedom motion coupling constraint is imposed on the bottom surface of the ice; a degree-of-freedom motion coupling constraint is imposed on the knife bridge 5, and the degree of freedom in the direction perpendicular to the ice surface of the ice skate is released; a 4-degree-of-freedom motion coupling constraint is imposed on the blade edge, and the degrees of freedom in the direction perpendicular to the ice surface and the side shift direction of the ice skate are released.

[0016] In some examples, node sets are created on the front surface and the rear surface of the ice skate knife bridge, and a pushing force on the ice is applied on the node sets, and the direction of the pushing force on the ice is perpendicular to the surface of the knife bridge.

[0017] In some examples, the magnitude of the total pushing force on the ice is changed by changing the number of node sets on the front surface and the rear surface of the knife bridge and / or the magnitude of the pushing force on the ice.

[0018] In some examples, the angle between the ice skate and the ice surface is adjusted by rotating around the central axis of the ice skate, so as to realize the change of the angle of the pushing force on the ice.

[0019] Advantages of the present invention:

[0020] The present invention makes up for the problem of insufficient quantification method of the deformation of the ice skate under high-speed sliding of athletes in the current speed skating movement, and can accurately simulate the real situation of the deformation of the ice skate during the speed skating process.

[0021] The present invention provides an easily implementable technical means for finding materials that can reduce the deformation of the ice skate during the pushing process and enhance the conduction efficiency of the pushing force, which is of great significance for improving the performance of athletes' sports efficacy.

[0022] By using the method of the present invention, the quantitative calculation of the deformation of the speed skating blade under different ice skate materials can be effectively carried out, and the problems of long test time and large discreteness of test results in the process of optimizing the process parameters and combination of various parts of the ice skate during the current ice skate manufacturing process can be effectively solved. While promoting the update and optimization of the ice skate material and the improvement of the performance, it greatly saves time, manpower and economic costs.

[0023] The present invention can accurately quantify the deformation of the local part and each component of the ice skate, and can provide a reliable technical means for analyzing the deformation characteristics of the speed skating blade under different pushing forces and different pushing angles during the speed skating movement, and provide guidance for the technical movements and strength of speed skating athletes, and comprehensively improve the efficiency of speed skating movement. Description of the drawings

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly introduced below.

[0025] Figure 1 It is a flow chart of a method for quantitatively calculating the deformation of a speed skating blade based on numerical simulation provided by an embodiment of the present invention.

[0026] Figure 2 Schematic diagram of the three-dimensional solid model of a speed skating blade provided by an embodiment of the present invention.

[0027] Figure 3 Mesh model diagram of a speed skating blade provided by an embodiment of the present invention, where 3(a) is the mesh model diagram of the entire speed skating blade, 3(b) is the mesh model diagram of the knife bridge, 3(c) is the mesh model diagram of the front bracket, 3(d) is the mesh model diagram of the support seat, 3(e) is the mesh model diagram of the knife tube, 3(f) is the mesh model diagram of the blade, and 3(g) is the mesh model diagram of the ice.

[0028] Figure 4 Boundary condition diagram provided by an embodiment of the present invention.

[0029] Figure 5 Diagram of the pushing force and pushing angle on the ice provided by an embodiment of the present invention.

[0030] Figure 6 Deformation nephogram of a speed skating blade provided by an embodiment of the present invention.

[0031] Figure 7 (a) Deformation characteristic diagram of a node on the blade of a speed skating blade provided by an embodiment of the present invention.

[0032] Figure 7 (b) is Figure 7 Schematic diagram of the position of the node shown in (a) on the deformation nephogram of the speed skating blade. Detailed implementation manners

[0033] Figure 1 Illustrates a method for quantitatively calculating the deformation of a speed skating blade based on numerical simulation. The present invention can accurately simulate the real situation of the deformation of the ice blade during speed skating, accurately quantify the deformation of the local part and each component of the ice blade, help to study the influence of the pushing force and pushing angle on the deformation of the speed skating blade, provide guidance for the technical movements and strength of speed skating athletes, and provide technical support for effectively carrying out the quantitative calculation of the deformation of speed skating blades under different ice blade materials. Moreover, the time, manpower and economic costs required to implement the present invention are short. The following combines Figure 1 to describe the present invention in detail.

[0034] Step 1, construct a three-dimensional solid model of a speed skating blade using three-dimensional modeling software. Figure 2 Shows a schematic diagram of the three-dimensional solid model of a speed skating blade. The three-dimensional solid model of the speed skating blade has a knife bridge, a front bracket, a support seat, a knife tube and a blade. The three-dimensional modeling software can use SOLIDWORKS 3D CAD software.

[0035] After obtaining the three-dimensional solid model, the traditional approach is to directly import it into general finite element analysis software such as ABAQUS for mesh generation and deformation calculation. However, since the ice skate has many components, and the shapes of the components are irregular, and there is a hollow structure in the blade tube, if the three-dimensional solid model is directly imported into ABAQUS to generate hexahedral meshes, hexahedral meshes cannot be generated for some components. Even if meshes are generated, calculations cannot be carried out because the aspect ratio of the meshes exceeds the internal limit of ABAQUS. Then, only tetrahedral meshes can be used for meshing. However, compared with hexahedral meshes, tetrahedral meshes have poor calculation accuracy and low calculation efficiency.

[0036] Step 2: Import the established three-dimensional solid model of the speed skating blade into the finite element mesh generation software, and use the finite element mesh generation software to generate meshes for each part of the speed skating blade and construct the ice mesh to establish a "speed skating blade - ice" mesh model. See Figure 3 .

[0037] In this application, Hypermesh software is used for mesh generation. Using the "Mappable" function of the "Geom" tool in Hypermesh software, the complex structure of the speed skating blade can be cut, and each part of the speed skating blade entity can be cut into a form that can be successfully divided into regular hexahedral meshes. The specific operations are as follows:

[0038] (1) Import the stp format file of the three-dimensional solid model of the speed skating blade exported from SOLIDWORKS 3D CAD software into Hypermesh software, and generate meshes for the five parts of the blade bridge, front bracket, support seat, blade tube, and blade respectively.

[0039] (2) In Hypermesh software, adjust the "Geometry Color Mode" to the "Mappable" mode for display, and use the "solid edit" function of the "Geom" tool in Hypermesh software to cut the blade bridge, front bracket, support seat, and blade entities of the ice skate, and cut each part entity into several units.

[0040] (3) Use the "quick edit" function of the "Geom" tool in Hypermesh software to clean the geometric model, including changing the shared edges to free edges or changing the compressed edges to shared edges to ensure that each unit of the blade bridge, front bracket, support seat, and blade of the ice skate is "Mappable".

[0041] (4) Use the "solid map" function of the "3D" tool in Hypermesh software to divide the hexahedral meshes of the skate bridge, front bracket, support base, and blade. Select the regular quadrilateral mesh "quads" for the mesh type, and the mesh size can be set between 0.40 and 1.00 mm.

[0042] (5) Since the skate tube is a hollow cylindrical structure, regular tetrahedral meshes are used for division. Use the "automesh" function of the "2D" tool in Hypermesh software to distribute regular triangular meshes on the surface of the tube, and then use the "tetramesh" function of the "3D" tool to divide the tetrahedral meshes. After the tetrahedral meshes are divided, delete the triangular meshes on the surface of the tube and only retain the tetrahedral meshes.

[0043] Since it is necessary to calculate the deformation during the contact process between the speed skating blade and the ice under a certain pushing force and pushing angle, in addition to the mesh model of the speed skating blade, a mesh model of the ice also needs to be constructed. At the same time, in order to ensure the calculation accuracy and efficiency, hexahedral meshes are still used to construct the mesh model of the ice. The specific operations are as follows:

[0044] (1) Use the "faces" function of the "Tool" tool in Hypermesh software to find the surface meshes of the skate with the hexahedral solid meshes of the skate, delete the side and upper surface meshes of the skate, and retain the surface meshes of the skate blade, that is, the meshes in contact with the ice surface. At the same time, use the "detach" function of the "3D" tool to separate the surface meshes of the skate blade from the original hexahedral solid meshes of the skate.

[0045] (2) Based on the surface meshes of the skate blade, use the "translate" function of the "Tool" tool to form the surface in contact with the ice by the lateral offset of the nodes of the surface meshes of the skate blade, that is, the width of the ice. At the same time, use the "automesh" function of the "2D" tool to redistribute regular quadrilateral meshes with the meshes as units. At this time, the surface meshes of the ice are arranged.

[0046] (3) Use the "elem offset" function of the "3D" tool in Hypermesh software to offset the surface meshes of the ice to form the hexahedral solid meshes of the ice. Then, delete the surface quadrilateral meshes of the ice and only retain the hexahedral solid meshes of the ice. At this time, the hexahedral mesh model of the ice is established.

[0047] Step 3, refer to Figure 4 、 Figure 5, set the mutual relationships of various parts of the speed skating blade in the finite element meshing software, establish the frictional contact between the blade of the speed skating blade and the ice surface, endow the material properties of various parts of the speed skating blade and the ice, set the motion coupling constraints and fixed boundary conditions, apply the pushing force on the ice and the pushing direction, and set up the analysis steps.

[0048] Since the speed skating blade consists of five parts: the blade bridge, the front bracket, the support seat, the blade tube, and the blade, the interactions between the parts are not the same, and the interaction relationship between the speed skating blade and the ice surface is the premise for calculating the deformation of the speed skating blade. Therefore, it is necessary to set the mutual relationships of various parts of the speed skating blade and between it and the ice surface. The specific operations are as follows:

[0049] (1) Use the "surface" function of the "contact manager" tool in Hypermesh software to establish the contact surfaces of the blade bridge, the front bracket, the support seat, the blade tube, the blade, and the ice respectively.

[0050] (2) During the speed skating process, the athlete slides at high speed on the ice using the speed skating blade, and the contact between the blade of the ice skate and the ice surface is frictional contact. It is necessary to define the frictional contact properties. Use the "Surface interaction" function of the "contact manager" tool in Hypermesh software to create a new frictional contact "Friction", and set the friction coefficient "FrictionCoeff" to 0.005.

[0051] (3) Use the "Interface" function of the "contact manager" tool in Hypermesh software to establish the settings of the mutual relationships between various parts of the speed skating blade and between it and the ice surface. Among them, the contact between the blade bridge and the front bracket, the blade bridge and the support seat, the front bracket and the blade tube, the support seat and the blade tube, and the blade tube and the blade is "tie" contact, and the contact between the blade of the ice skate and the ice surface is "Contactpair" contact, and the contact method is frictional contact.

[0052] The materials of various parts of the speed skating blade, such as the blade bridge, the front bracket, the support seat, the blade tube, and the blade, are not the same, and the material has a great influence on the deformation of the speed skating blade. The present invention endows the material properties of various parts of the speed skating blade and the ice. The specific operations are as follows:

[0053] (1) Use the "Materials" function in Hypermesh software to create new materials, mainly setting the "density", "E(1)" (Young's modulus), and "NU(1)" (Poisson's ratio) of the materials.

[0054] (2) Use the "properties" function in Hypermesh software to create a new property, and set the property "type" = "solidsection", "card image" = "solidsection", "material" = the corresponding material.

[0055] (3) Open "components" and assign the material properties of each component. In the present invention, the ice skate blade bridge, front bracket, and blade tube are made of aluminum alloy, the support base is made of nylon, and the blade is made of stainless steel, but it is not limited thereto.

[0056] During the speed skating movement process, there are motion coupling constraints between different parts of the speed skating blade, and the degrees of freedom of motion of different parts of "speed skating blade - ice" are also inconsistent. It is necessary to establish the motion coupling constraints of the corresponding parts of the blade and the fixed boundary conditions of "speed skating blade - ice". The specific operations are as follows:

[0057] (1) Use the "rigid" function of the "1D" tool in Hypermesh software to complete the 6-degree-of-freedom motion coupling constraints of the front connection hole, rear connection hole of the ice skate blade bridge, and the blade bridge with the front bracket, front bracket with the blade tube, and support base with the blade tube. The front connection hole and rear connection hole of the blade bridge are connected to the ice skate.

[0058] (2) Complete the 6-degree-of-freedom full constraint of the bottom surface of the ice. Use the "constraints" function of the "Analysis" tool in Hypermesh software, select the mesh nodes of the entire bottom surface of the ice, and set "load types" = "boundary" to complete the constraint of 6 degrees of freedom of the bottom surface of the ice.

[0059] (3) Complete the 5-degree-of-freedom constraint of the ice skate blade bridge. Use the "constraints" function of the "Analysis" tool in Hypermesh software, select the motion coupling constraint nodes of the front connection hole and rear connection hole of the ice skate blade bridge, and set "load types" = "boundary" to complete the 5-degree-of-freedom constraint of the ice skate blade bridge, and only release the degree of freedom in the direction perpendicular to the ice surface of the blade.

[0060] (4) Complete the 4-degree-of-freedom constraint of the bottom surface of the ice skate blade edge. Use the "constraints" function of the "Analysis" tool in Hypermesh software, select the mesh nodes in contact with the ice surface on the bottom surface of the ice skate blade edge, and set "load types" = "boundary" to complete the 4-degree-of-freedom constraint of the bottom surface of the ice skate blade edge, and only release the degrees of freedom in the direction perpendicular to the ice surface and the side shift direction of the blade.

[0061] During the speed skating process, the athlete relies on the pushing force generated by pushing the ice towards the left rear or right rear to provide the forward driving force for speed skating. The pushing force and the pushing angle will directly lead to differences in the deformation of the ice skate blade during speed skating. In the present invention, a pushing force is applied to the speed skating blade at a certain pushing angle to analyze the deformation of the speed skating blade under different pushing forces and pushing angles. The specific operations are as follows:

[0062] (1) Since the ice skate and the ice skate blade are connected through the front connection hole and the rear connection hole of the blade bridge, the main stress points of the ice skate blade are the front surface and the rear surface of the blade bridge. Use the "entity sets" function of the "Analysis" tool in Hypermesh software to create a node set for the front surface and the rear surface of the ice skate blade bridge.

[0063] (2) Use the "forces" function of the "Analysis" tool in Hypermesh software to apply a uniform pushing force to the above node set through "magnitude", and the "load types" is "cload" to create the pushing force for each node on the front surface and the rear surface of the ice skate blade bridge. The direction of the pushing force is perpendicular to the surface of the ice skate blade bridge, and the total pushing force is equal to the sum of the pushing forces of each node.

[0064] The total pushing force is changed by changing the magnitude of the pushing force of each node on the front surface and the rear surface of the ice skate blade bridge and the number of nodes.

[0065] The angle between the ice skate blade and the ice surface is adjusted by rotating around the central axis of the ice skate blade, thereby realizing the change of the pushing angle. Specifically: use the "rotate" function in the "Tool" tool of Hypermesh software, select the overall mesh model of the speed skating blade, keep the mesh model of the ice unchanged, adjust the overall mesh model of the ice skate blade to the front view, select the central node of the contact surface mesh between the ice skate blade and the ice as the rotation center, set the rotation angle, and adjust the angle between the ice skate blade and the ice surface, thereby realizing the change of the pushing angle.

[0066] During the speed skating process, the quantification of the deformation of the ice skate blade is represented by the spatial displacement index of each part of the speed skating blade during the process of the pushing force acting at a certain pushing angle. Use the "step manager" tool in Hypermesh software to create a "static, general" analysis step, set the time length to 1, the initial increment step to 0.1, the maximum increment step to 1, and the minimum increment step to 1e-5. Select the fixed boundary conditions and the pushing force set above, create a field output, and the output parameters include "U, TU", etc. Save and export the file as an inp. format file.

[0067] Step S4: Use finite element numerical simulation software to calculate the deformation of the speed skating blade. By performing the deformation calculation of the speed skating blade, the deformation nephogram of each part of the speed skating blade and the deformation characteristics of any local part or component of the speed skating blade can be obtained. The specific analysis steps are as follows:

[0068] (1) Import the inp. file of the above speed skating blade solid model into the ABAQUS finite element numerical simulation software, use the direct linear equation solution method and the full Newton solution technique, and submit the analysis.

[0069] (2) After the analysis is completed, open the "odb" result file, select the field output as "U", and obtain the deformation nephogram of each part of the speed skating blade.

[0070] (3) Create "XY data", select any node or node set of the speed skating blade from the view, and draw the variation characteristic diagrams of the spatial displacement (U, U1, U2, U3) and rotational displacement (UR, UR1, UR2, UR3) of the node with the time step, so as to obtain the deformation characteristics of the local part or component of the speed skating blade. See Figure 6 、 Figure 7 , Figure 6 shows a deformation nephogram of a speed skating blade, Figure 7 (a) shows the deformation characteristic diagram (time-displacement change curve) of a node on the blade of the speed skating blade, Figure 7 (b) shows Figure 7 the position of the node shown in (a) on the deformation nephogram of the speed skating blade.

Claims

1. A numerical simulation-based method for calculating the deformation of speed skating blades, characterized in that, it includes: Using 3D modeling software to model the bridge, front bracket, support base, blade tube and blade of the skating blade, and constructing a 3D solid model of the skating blade; Import the established 3D solid model of the skating blade into finite element mesh generation software, use the finite element mesh generation software to perform mesh generation on each part of the skating blade and construct the ice mesh, establish a speed skating blade-ice mesh model. When performing mesh generation on each part of the skating blade, cut the bridge, front bracket, support base and blade entities of the skating blade into several elements, clean the geometric model, and then perform hexahedron mesh generation to obtain a regular hexahedron solid mesh model of the bridge, front bracket, support base and blade. Regular triangular meshes are arranged on the surface of the blade tube of the skating blade, and then tetrahedron solid mesh generation of the blade tube is performed. After the tetrahedron solid mesh generation is completed, delete the triangular meshes on the surface of the blade tube to obtain a tetrahedron solid mesh model of the blade tube of the skating blade; Set the mutual relationships between the bridge, front bracket, support base, blade tube and blade of the skating blade in the finite element mesh generation software, establish the frictional contact between the blade edge of the skating blade and the ice surface, endow the bridge, front bracket, support base, blade tube and blade of the skating blade and the ice with material properties, set the motion coupling constraints and fixed boundary conditions, apply the pushing force and the pushing direction, and perform the setting of the analysis step. Finally, create an output file; Import the output file of the finite element mesh generation software into finite element numerical simulation software to perform deformation calculation of the skating blade, and obtain the deformation nephogram of each part of the skating blade and the deformation characteristics of any local part or component of the speed skating blade.

2. The numerical simulation-based method for calculating the deformation of speed skating blades according to claim 1, characterized in that, the ice mesh construction method includes: Find the surface mesh of the skating blade from the hexahedron solid mesh of the skating blade, delete the side and upper surface meshes of the skating blade, retain the blade surface mesh in the part where the skating blade contacts the ice surface, and separate the blade surface mesh from the hexahedron solid mesh of the skating blade; Based on the blade surface mesh, laterally offset the nodes of the blade surface mesh to form the surface where the blade contacts the ice, that is, the width of the ice, and at the same time re-arrange regular quadrilateral meshes with the meshes as units to complete the layout of the ice surface mesh; Perform offset of the ice surface mesh to form a hexahedron solid mesh of the ice, and then delete the surface quadrilateral meshes of the ice and only retain the hexahedron solid mesh of the ice to complete the establishment of the hexahedron mesh model of the ice.

3. The numerical simulation-based method for calculating the deformation of speed skating blades according to claim 1, characterized in that, The contact between the bridge and the front bracket, the bridge and the support base, the front bracket and the blade tube, the support base and the blade tube, and the blade tube and the blade is a bonded contact.

4. The numerical simulation-based method for calculating the deformation of speed skating blades according to claim 1, characterized in that, Couple the 6-degree-of-freedom motion constraints for the front connection hole and the rear connection hole of the knife bridge connecting the ice skate, the front bracket and the knife tube, and the support seat and the knife tube; couple the 6-degree-of-freedom motion constraints for the bottom surface of the ice; couple the degree-of-freedom motion constraints for the knife bridge 5 and release the degree of freedom in the direction perpendicular to the ice surface of the ice blade; couple the 4-degree-of-freedom motion constraints for the blade edge and release the degrees of freedom in the direction perpendicular to the ice surface and the side shift direction of the ice blade.

5. The method for calculating the deformation quantification of a speed skating blade based on numerical simulation according to claim 1, characterized in that, Create node sets on the front and rear surfaces of the knife bridge of the ice blade, and apply a pushing force on the node sets, and the direction of the pushing force is perpendicular to the surface of the knife bridge.

6. The method for calculating the deformation quantification of a speed skating blade based on numerical simulation according to claim 5, characterized in that, Change the magnitude of the total pushing force by changing the number of node sets on the front and rear surfaces of the knife bridge and / or the magnitude of the pushing force.

7. The method for calculating the deformation quantification of a speed skating blade based on numerical simulation according to claim 5 or 6, characterized in that, Adjust the angle between the ice blade and the ice surface by rotating around the central axis of the ice blade, thereby realizing the change of the angle of the pushing force.

Images