Parameter calculation method of connecting structural member and connecting structural member

Abstract

The invention belongs to the technical field of equipment vibration reduction, and particularly relates to a parameter calculation method of a connecting structural part and the connecting structural part. In the parameter calculation method of the connecting structural member, the calculation formula of the vertical rigidity of an elastic element of the connecting structural member is as follows: KV = FV / S2, wherein KV is the vertical rigidity of the elastic element; fV is the vertical counter force of the elastic element; and S2 is the vertical compression displacement of the elastic element under the action of FV.

Description

Technical Field

[0001] The present invention belongs to the technical field of equipment vibration reduction, and in particular, relates to a parameter calculation method of a connecting structure and a connecting structure. Background Art

[0002] In the connection and fixing system of two components in contact with each other, anchor bolts are the main components, such as the connection of two steel plates. Anchor bolts are both the main connection part of the two components and the weak link. Under the action of external forces, anchor bolts are often sheared and deformed, which seriously endangers the safety of components and needs to be paid great attention.

[0003] Among them, in the connection system of two steel plates, in order to make the anchor bolts evenly bear the horizontal load of the two steel plates, through holes or threaded holes are often evenly arranged around or on both sides of the two steel plates, and the anchor bolts are placed in the through holes or threaded holes, so as to play the role of connection and fixing. When the connection system of the two steel plates is impacted by external forces, a certain anchor bolt is subjected to uneven force. It is difficult to resist the impact or extrusion of uneven forces by relying solely on the strength of the anchor bolt itself, resulting in the phenomenon that the anchor bolt is overstressed and broken.

[0004] At present, common measures for buffering and protecting anchor bolts, such as adding an elastic body between the anchor bolt and the steel plate, only play a role in axial vibration reduction of the anchor bolt, but have almost no effect on tangential vibration reduction of the anchor bolt.

[0005] Since the tangential external force of the two steel plates on the anchor bolts is much greater than the axial external force, vibration reduction and buffering measures such as strengthening the tangential uniform force on the anchor bolts are more conducive to reducing the risk of anchor bolt breakage.

[0006] Therefore, there is an urgent need to develop a connecting structure that can be more conducive to reducing the risk of breakage of the anchor bolts.

[0007] After the two steel plates are fixed using the connecting mechanism provided by the present invention, one of the two steel plates is used as a movable steel plate and the other is used as a fixed steel plate. When subjected to external horizontal and vertical forces, the two steel plates produce horizontal slippage, and most of the external energy can be dissipated by the friction energy consumption of the two steel plates, and the remaining external energy is then transferred to the anchor bolts, that is, the remaining external energy is tangentially transferred to the anchor bolts in the form of a single horizontal force. The remaining external energy is transferred to the anchor bolts in the form of both horizontal and vertical forces, which provides better buffering and protection for the anchor bolts. In the above-mentioned transmission process of horizontal and vertical forces, the stiffness calculation of the anchor bolt buffer structure is mainly involved, including the initial stiffness, post-bend stiffness and equivalent stiffness of the hysteresis curve formed by the horizontal sliding of the two steel plates, as well as the vertical compression stiffness of the elastic body. In summary, it is necessary to study and analyze the stiffness calculation method of the anchor bolt buffer structure, that is, to conduct in-depth research on the horizontal and vertical forces of the anchor bolt buffer structure. Summary of the invention

[0008] In view of the above-mentioned technical problems, the present invention aims to provide a parameter calculation method for a connecting structural member, which can conduct in-depth research and calculation on various parameters of the connecting structural member.

[0009] The present invention also provides a connecting structure, which can reduce the risk of breaking of the anchor bolts.

[0010] According to the present invention, a method for calculating the parameters of a connecting structure is provided, wherein the vertical stiffness K of the elastic element of the connecting structure is V The calculation formula is as follows:

[0011] K V =F V / S2

[0012] in:

[0013] F V is the vertical reaction force of the elastic element;

[0014] S2 is the elastic element at F V Vertical compression displacement under the action of .

[0015] In a specific embodiment, the F V The calculation formula is as follows:

[0016] F V =α(F H1 -μ1P)

[0017] in:

[0018] α is the force transmission coefficient of the elastic element;

[0019] FH1 is the external horizontal force received by the first member of the connecting structure;

[0020] μ1 is the sliding friction coefficient between the first member and the second member of the connecting structure;

[0021] P is the vertical external force between the first member and the second member;

[0022] The calculation formula of S2 is as follows:

[0023] S2=S1tanθ

[0024] in:

[0025] S1 is the external horizontal force F of the first component H1 Horizontal sliding displacement under the action of

[0026] θ is the inclination angle of the inclined surface of the force transmission block.

[0027] In a specific embodiment, the first member is subjected to an external horizontal force F H1 The calculation formula is as follows:

[0028]

[0029] In a specific embodiment, the calculation formula of the equivalent stiffness of the first component of the connecting structure is as follows:

[0030]

[0031] in:

[0032] K eff is the equivalent stiffness;

[0033] F H1 is the external horizontal force applied to the first member;

[0034] S1 is the external horizontal force F of the first component H1 Horizontal sliding displacement under the action of .

[0035] In a specific embodiment, the calculation formula of the initial stiffness K1 of the connecting structure is as follows:

[0036]

[0037] in:

[0038] μ1 is the sliding friction coefficient between the first member and the second member of the connecting structure;

[0039] P is the vertical external force between the first member and the second member;

[0040] S0 is the horizontal sliding displacement when the first member overcomes the static friction force and starts to slide.

[0041] In a specific embodiment, the calculation formula of the post-buckling stiffness K2 of the connecting structure is as follows:

[0042] or

[0043] in:

[0044] α is the force transmission coefficient of the elastic element;

[0045] S1 is the external horizontal force F of the first component H1 Horizontal sliding displacement under the action of , at this time S1 is greater than S0;

[0046] F H1 is the external horizontal force received by the first member of the connecting structure;

[0047] μ1 is the sliding friction coefficient between the first member and the second member of the connecting structure;

[0048] P is the vertical external force between the first component and the second component.

[0049] In a specific embodiment, the calculation formula of α is as follows:

[0050]

[0051] μ2 is the sliding friction coefficient between the inclined surface of the force transmission block of the connecting structure and the first member;

[0052] μ3 is the sliding friction coefficient between the bolts of the connecting structure and the force transmission block;

[0053] θ is the inclination angle of the inclined surface of the force transmission block.

[0054] In a specific embodiment, the post-buckling stiffness K2 of the connecting structure is equal to the vertical stiffness K of the elastic element of the connecting structure. V The relationship between them is as follows:

[0055]

[0056] In a specific embodiment, the calculation method of the horizontal reaction force of the bolts connecting the structural parts is as follows:

[0057] F H2 =β(F H1 -μ1P)

[0058] in:

[0059] F H2 is the horizontal reaction force of the bolt;

[0060] β is the force transmission coefficient of the bolt;

[0061] F H1 is the external horizontal force received by the first member of the connecting structure;

[0062] μ1 is the sliding friction coefficient between the first member and the second member of the connecting structure;

[0063] P is the vertical external force between the first component and the second component.

[0064] In a specific embodiment, the calculation formula of β is as follows:

[0065]

[0066] in:

[0067] μ2 is the sliding friction coefficient between the inclined surface of the force transmission block of the connecting structure and the first member;

[0068] θ is the inclination angle of the inclined surface of the force transmission block of the connecting structure.

[0069] According to the present invention, there is also provided a connecting structure member applicable to the parameter calculation method proposed in the present invention, which is used to connect a first member and a second member, comprising:

[0070] A bolt, comprising a screw rod and a screw head, wherein the screw rod passes through the first member and the second member in sequence;

[0071] A force transmission block is arranged outside the screw rod, and the contact surface between the force transmission block and the first member is arranged as mutually adapted inclined surfaces;

[0072] An elastic element is arranged on the outside of the screw rod, the elastic element is constructed as a disc spring assembly, and is located between the screw head and the force transmission block;

[0073] The disc spring assembly includes a guide ring connected to the bolt guide, and / or the disc spring assembly includes a guide cylinder coaxially sleeved on the outside.

[0074] Compared with the prior art, the advantages of the present application are as follows.

[0075] The connecting structure provided by the present invention closely links the horizontal energy dissipation hysteresis curve and the vertical energy dissipation hysteresis curve of the structure after the first component and the second component are fixed together through the force transmission block, forming a superimposed hysteresis curve of the overall energy dissipation of the buffer structure, and the constitutive relationship of the hysteresis curve is similar to the bilinear model.

[0076] The horizontal force of the first component is linked with the vertical force of the disc spring assembly through the force transmission block. The first component overcomes the friction between it and the second component to slide horizontally, and pushes the force transmission block to slide vertically, thereby compressing the disc spring assembly to produce vertical compression displacement. Therefore, the first component, the force transmission block, and the disc spring assembly are connected into an integral energy dissipation system through the second component and the bolts to achieve horizontal and vertical sliding. The initial stiffness, post-buckling stiffness and equivalent stiffness generated by the horizontal sliding of the first component are linked with the vertical compression stiffness of the disc spring assembly and the inclination angle of the inclined surface of the force transmission block, which facilitates the structural optimization design of the force transmission block.

[0077] The present invention changes the magnitude of the force transmission coefficients α and β by adjusting the inclination angle of the inclined surface of the force transmission block, thereby changing the magnitude of both the vertical reaction force of the disc spring assembly and the horizontal reaction force of the bolt. The horizontal reaction force of the bolt and the vertical reaction force of the disc spring assembly are negatively correlated with the inclination angle of the inclined surface of the force transmission block. As shown in the figure, when the horizontal reaction force of the bolt is small, the inclination angle of the inclined surface of the force transmission block is small, and the vertical reaction force of the disc spring assembly is large. In addition, the vertical compression displacement of the disc spring assembly and the horizontal sliding displacement of the first component are in a tangent relationship with the inclination angle of the inclined surface of the force transmission block. When the horizontal sliding displacement of the first component remains unchanged, a force transmission block with a smaller inclination angle of the inclined surface is set, and the vertical compression displacement of the disc spring assembly is small. Therefore, by setting a force transmission block with a smaller inclination angle of the inclined surface, it is beneficial to obtain a disc spring assembly with a smaller vertical compression displacement and a larger vertical reaction force, that is, a disc spring assembly with a larger vertical stiffness is more in line with the design requirements, which is beneficial to a connecting structural member with a smaller overall height.

[0078] The present invention adds a guide ring at the center of the disc spring assembly, and integrates the guide ring with the disc spring body to form a special-shaped disc spring. The disc spring body plays a vertical compression role, and the guide ring only plays an auxiliary guiding role.

[0079] The present invention optimizes the structure of the guide cylinder of the disc spring assembly and the gasket on its top, connects the gasket and the guide cylinder into an integrated structure, and maintains a vertical gap between the bottom of the guide cylinder and the first component, and the vertical gap is equal to the pre-compression displacement of the disc spring assembly. After the disc spring assembly is pre-compressed, the guide cylinder and the first component are tightly fitted, which can prevent the disc spring assembly from being subjected to an eccentric load after vertical compression, causing a large bending deformation of the bolt, thereby preventing the bolt from losing its vertical guiding function. BRIEF DESCRIPTION OF THE DRAWINGS

[0080] The present invention will be described below with reference to the accompanying drawings.

[0081] Figure 1 A schematic structural diagram of an embodiment of a connecting structural member according to the present invention;

[0082] Figure 2 for Figure 1 A schematic diagram of a local enlarged structure;

[0083] Figure 3 A schematic structural diagram of an embodiment of a disc spring member according to the present invention;

[0084] Figure 4 A schematic diagram of the three-dimensional structure of a disc spring member according to an embodiment of the present invention;

[0085] Figure 5 A schematic structural diagram of an embodiment of a force transmission block according to the present invention;

[0086] Figure 6 A schematic diagram of the three-dimensional structure of an embodiment of a force transmission block according to the present invention;

[0087] Figure 7 A force split diagram of the first component according to the present invention;

[0088] Figure 8 A force split diagram of the force transmission block according to the present invention;

[0089] Fig. 9 is the equivalent stiffness relationship diagram;

[0090] Fig.10 The figure is a relationship diagram between the inclination angle of the inclined surface of the force transmission block and the vertical reaction force of the disc spring assembly and the horizontal reaction force of the screw rod;

[0091] Fig.11 A schematic structural diagram of another embodiment of a connecting structural member according to the present invention;

[0092] Fig.12 for Fig.11 Schematic diagram of the local enlarged structure.

[0093] In the figure:

[0094] 1. Bolt; 11. Screw; 12. Screw head;

[0095] 2. Gasket;

[0096] 3. disc spring assembly; 30. disc spring member; 31. guide ring; 32. disc spring body; 33. guide cylinder;

[0097] 4. Force transmission block; 41. Incline;

[0098] 61. first component; 611. through hole; 62. second component;

[0099] 100. Connecting structural parts.

[0100] In the present application, all drawings are schematic drawings, which are only used to illustrate the principles of the present invention and are not drawn according to the actual scale. DETAILED DESCRIPTION

[0101] The present invention will be described below with reference to the accompanying drawings.

[0102] It should be noted that the directional terms or qualifiers "upper" and "lower" used in this application are all directed to the referenced Figure 1 They are not intended to define the absolute positions of the components involved, but may vary depending on the specific circumstances.

[0103] Figure 1 1 shows the structure of the connecting structure 100 according to the present invention. Figure 1 As shown, the connecting structure 100 is used to connect the first component 61 and the second component 62. In this embodiment, the first component 61 and the second component 62 are both steel plates. It is easy to understand that the first component 61 and the second component 62 can also be any other workpieces that need to be connected to each other.

[0104] like Figure 1 As shown, the connecting structure 100 mainly includes a bolt 1, a disc spring assembly 3 and a force transmission block 4.

[0105] The bolt 1 includes a screw rod 11 and a screw head 12. The diameter of the screw head 12 is larger than the diameter of the screw rod 11. An external thread is provided at the end of the screw rod 11 away from the screw head 12. The specific structure of the bolt 1 is well known to those skilled in the art, and the structure of the bolt 1 provided in this embodiment is not intended to limit the protection scope of the present invention.

[0106] The disc spring assembly 3 includes at least one disc spring member 30 arranged coaxially. Figure 1 The plurality of disc spring members 30 are alternately sleeved on the outer side of the screw rod 11 in the axial direction in a positive and negative direction. The specific number of the disc spring members 30 can be adjusted according to actual use requirements.

[0107] like Figure 3 and Figure 4 As shown, the disc spring member 30 includes a guide ring 31 and a disc spring body 32. The guide ring 31 is constructed in a circular ring shape and is arranged in a plane. The inner diameter of the guide ring 31 is adapted to the outer diameter of the screw 11, that is, the inner diameter of the guide ring 31 is equal to the nominal diameter of the bolt 1, and the guide ring 31 can be coaxially sleeved on the screw 11 and move axially along the screw 11. The disc spring body 32 is constructed in a conical ring shape, the outer diameter of the guide ring 31 is equal to the inner diameter of the disc spring body 32, and the inner wall of the disc spring body 32 is fixed to the outer wall of the guide ring 31. In this embodiment, the disc spring body 32 and the guide ring 31 are an integrated structure, or the outer side of the guide ring 31 is welded and fixed to the disc spring body 32.

[0108] In a specific embodiment, the thickness of the guide ring 31 is less than or equal to the thickness of the disc spring body 32. Figure 3 As shown, the thickness t1 of the guide ring 31 is less than or equal to the thickness t of the disc spring body 32. In this embodiment, the thickness of the guide ring 31 is much smaller than the thickness of the disc spring body 32, and plays an auxiliary guiding role for the disc spring assembly 3, and does not participate in the vertical force of the disc spring assembly 3.

[0109] The disc spring assembly 3 adopts a combined disc spring assembly, which has a smaller installation height, a smaller vertical compression displacement, and a larger vertical bearing capacity, that is, the vertical reaction force of the disc spring assembly 3 is larger.

[0110] The force transmission block 4 is coaxially sleeved on the outer side of the screw 11, and the force transmission block 4 is constructed in a truncated cone or a prism shape, as long as the lower end of the force transmission block 4 and the surface of the first component 61 are released at an inclined angle θ. Figure 5 and Figure 6 As shown, in this embodiment, the force transmission block 4 is constructed in a truncated cone shape, and the inner diameter of the force transmission block 4 is adapted to the outer diameter of the screw 11. The lower end surface of the force transmission block 4 is provided with an inclined surface 41. In this embodiment, the inclined surface 41 is constructed as a conical surface with an outer diameter gradually increasing from bottom to top. The upper end of the first component 61 is constructed in a shape that is adapted to the inclined surface 41 of the force transmission block 4.

[0111] According to the present invention, Figure 1 As shown, the screw rod 11 is inserted into the through hole 611 of the first member 61, and there is a gap between the screw rod 11 and the through hole 611. The difference between the outer diameter of the screw rod 11 and the aperture of the through hole 611 is the horizontal displacement range of the first member 61 relative to the second member 62. Under this setting, a large horizontal sliding displacement can be generated between the first member 61 and the second member 62, which effectively reduces the horizontal load transmitted to the bolt 1 by the first member 61. At the same time, by setting the force transmission block 4 and the disc spring assembly 3, the horizontal load transmitted to the bolt 1 by the first member 61 is converted into a vertical load, and the vertical load is further buffered and released by the disc spring assembly 3, which plays a buffering and protective role on the bolt 1.

[0112] In a preferred embodiment, a gasket 2 is provided between the disc spring assembly 3 and the screw head 12, the inner diameter of the gasket 2 is smaller than the outer diameter of the screw head 12, and the outer diameter of the gasket 2 is larger than the outer diameter of the disc spring assembly 3. The upper end surface of the gasket 2 axially abuts against the lower end surface of the screw head 12, the lower end surface of the gasket 2 axially abuts against the upper end surface of the disc spring assembly 3, the lower end surface of the disc spring assembly 3 axially abuts against the upper end surface of the force transmission block 4, the inclined surface 41 at the lower end of the force transmission block 4 abuts against the upper end surface of the first member 61, and the lower end surface of the first member 61 axially abuts against the second member 62.

[0113] like Figure 1As shown, the screw rod 11 passes through the first component 61 and the second component 62 from top to bottom. The disc spring assembly 3 and the force transmission block 4 are coaxially sleeved on the screw rod 11 from top to bottom, and the disc spring assembly 3 and the force transmission block 4 are both arranged between the screw head 12 and the first component 61, and the disc spring assembly 3 is located between the screw head 12 and the force transmission block 4. In this embodiment, the lower end of the screw rod 11 is directly connected to the second component 62 through a thread, thereby providing a preload force for the disc spring assembly 3. In another embodiment, the lower end of the screw rod 11 passes through the second component 62, and then the lower end of the screw rod 11 is connected to the nut through a thread, thereby providing a preload force for the disc spring assembly 3.

[0114] In another embodiment provided according to the present invention, Fig.11 and Fig.12 As shown, the disc spring assembly 3 also includes a guide cylinder 33. The guide cylinder 33 is constructed as a circular sleeve, which is coaxially sleeved on the outside of the bolt 1, and the disc spring body 32 is located on the inside of the guide cylinder 33. The upper end of the guide cylinder 33 is connected to the gasket 2 by welding. The vertical gap between the bottom of the guide cylinder 33 and the first component 61 is L3, and the vertical gap L3 is slightly equal to the pre-compression displacement of the disc spring assembly 3. After the disc spring assembly 3 is pre-compressed, the guide cylinder 33 and the first component 61 are tightly fitted, which can prevent the disc spring assembly 3 from generating an eccentric load after vertical compression, resulting in a large bending deformation of the head of the bolt 1, causing the bolt 1 to lose its vertical guiding effect on the disc spring assembly 3. An appropriate horizontal gap L1 is set between the inner wall of the guide cylinder 33 and the outer side of the top of the force transmission block 4, and a horizontal gap L2 is also set between the outer wall of the guide cylinder 33 and the edge of the first component 61. The horizontal gap L2 is slightly larger than the horizontal gap S1 between the through hole 611 of the first component 61 and the bolt 1, so as to prevent the bottom of the guide cylinder 33 from falling after the first component 61 generates a horizontal sliding displacement S1.

[0115] In this embodiment, the first component 61 serves as a movable part, and the second component 62 serves as a fixed part. After the connecting structure 100 fixes the first component 61 and the second component 62 to each other, it can provide vertical pressure for the first component 61 and the second component 62. When the first component 61 is subjected to an external horizontal force, the first component 61 produces horizontal slippage relative to the second component 62, and most of the external energy can be dissipated by the friction energy consumption of the first component 61 and the second component 62. The remaining external energy is transmitted to the bolt 1 in the form of both horizontal force and vertical force, which provides better buffering protection for the bolt 1. In other words, the first component 61 moves the force transmission block 4 upward in the vertical direction through the inclined surface 41, compresses the disc spring assembly 3, and thus converts the horizontal displacement of the first component 61 relative to the second component 62 into the vertical deformation of the disc spring assembly 3.

[0116] In the above-mentioned transmission process of horizontal force and vertical force, the stiffness calculation is mainly involved, including the initial stiffness, post-bend stiffness and equivalent stiffness of the hysteresis curve formed by the horizontal sliding of the first member 61 relative to the second member 62, as well as the vertical compression stiffness of the disc spring assembly 3. In summary, it is necessary to study and analyze the stiffness calculation method, that is, to conduct an in-depth study on the horizontal force and vertical force after the connecting structure 100 provided by the present invention fixes the first member 61 and the second member 62.

[0117] The vertical stiffness of the disc spring assembly 3 is the ratio of the vertical reaction force of the force transmission block 4 on the disc spring assembly 3 to the vertical compression displacement of the disc spring assembly 3. The vertical reaction force of the force transmission block 4 on the disc spring assembly 3 is mainly determined by the forces of the first component 61 and the force transmission block 4.

[0118] Among them, Figure 7 As shown, the force on the first member 61 includes an external horizontal force F H1 , external vertical force P, vertical reaction force F provided by the second member 62 N1 And the horizontal friction force f1, the normal reaction force F of the slope provided by the force transmission block 4 N2 And tangential friction f2. Figure 8 As shown, the force of the force transmission block 4 includes the vertical reaction force F of the disc spring assembly 3. V , the normal reaction force F of the inclined surface of the through hole 611 of the first member 61 N2 and tangential friction force f2, horizontal reaction force F of bolt 1 H2 and vertical friction force f3.

[0119] Vertical stiffness K of disc spring assembly 3 V is the vertical reaction force F of the force transmission block 4 on the disc spring assembly 3 V The ratio of the vertical compression displacement S2 of the disc spring assembly 3, the vertical reaction force F of the force transmission block 4 on the disc spring assembly 3 V It is mainly determined by the forces on the movable steel plate 5 and the force transmission block 4. In the force analysis of the movable steel plate 5, the external horizontal force F H1 , external vertical force P, vertical reaction force F provided by the second member 62 N1 And the horizontal friction force f1, the normal reaction force F of the inclined surface 41 provided by the force transmission block 4 N2 and tangential friction force f2; the horizontal direction relationship (1.1) and vertical force relationship (1.2) obtained by the first member 61 are:

[0120] F N1 +f2 sinθ=P+F N2 cosθ (1.1)

[0121] F H1 -f1-f2cosθ-F N2sinθ=ma (1.2)

[0122] In the force analysis of the force transmission block 4, the vertical reaction force F of the disc spring assembly 3 is included. V , the normal reaction force F′ of the inclined surface of the through hole 611 of the first member 61 N2 and the tangential friction force f2′, the horizontal reaction force F of bolt 1 H2 And vertical friction force f3. The horizontal direction relationship (1.3) and vertical force relationship (1.4) obtained by the force transmission block 4 are:

[0123] F′ N2 cosθ=f2′sinθ+f3+F V (1.3)

[0124] f2′cosθ+F′ N2 sinθ=F H2 (1.4)

[0125] Where f1 = μ1F N1 , f2=f2′=μ2F N2 =μ2F′ N2 , f3=μ3F H , μ1, μ2, and μ3 are the sliding friction coefficients between the first member 61 and the second member 62, between the inclined surface 41 of the force transmission block 4 and the inclined surface of the upper end surface of the through hole 611 of the first member 61, and between the bolt 1 and the force transmission block 4 respectively; θ is the inclination angle of the inclined surface 41 of the force transmission block 4, m is the weight of the first member 61 (a steel plate in this embodiment) (m=400kg); a is the horizontal earthquake acceleration, which is 0.15g, i.e. 1.47m / s 2 .

[0126] Combining equations (1.1) to (1.4), the vertical reaction force F of the disc spring assembly 3 can be obtained by simplified calculation: V and the horizontal reaction force F of bolt 1 H2 The relationship is:

[0127] F V =α(F H1 -μ1P) (1.5)

[0128] F H2 =β(F H1 -μ1P) (1.6)

[0129] Where α is the force transmission coefficient of the disc spring assembly 3,

[0130] β is the force transmission coefficient of bolt 1,

[0131] The vertical compression displacement S2 of the disc spring assembly 3 is mainly determined by the horizontal sliding of the first member 61 relative to the second member 62 and the vertical sliding of the force transmission block 4 relative to the first member 61. H1 The horizontal sliding displacement S1 is generated under the action of the first member 61, which pushes the force transmission block 4 to slide vertically, thereby compressing the disc spring assembly 3 to generate a vertical compression displacement S2, wherein the magnitude of the vertical compression displacement S2 of the disc spring assembly 3 is related to the inclination angle θ between the horizontal sliding displacement S1 of the first member 61 and the inclined surface 41 of the force transmission block 4, that is:

[0132] S2=S1tanθ(1.9)

[0133] The first member 61 slides horizontally on the second member 62, and forms horizontal hysteresis energy consumption. Part of the horizontal hysteresis energy consumption is borne by the friction energy consumption between the first member 61 and the second member 62, and the other part of the energy consumption is borne by the vertical buffer energy consumption generated by the force transmission block 4 and the disc spring assembly 3. The hysteresis curve formed by the horizontal hysteresis energy consumption of the first member 61 is the horizontal force F H The constitutive relationship between the horizontal displacement S of the first member 61. Specifically in this embodiment, the first member 61 is subjected to the external horizontal force F H1 When the first member 61 slides horizontally under the action of H1 The relationship between the vertical reaction force Fv of the disc spring assembly 3 and the inclination angle θ of the inclined surface 41 of the force transmission block 4 is:

[0134]

[0135] The main parameters of the constitutive relationship include the initial displacement S0, initial stiffness K1, post-buckling stiffness K2 and equivalent stiffness K of the first component 61. eff = H1 When the horizontal sliding displacement S1 is caused by the action of eff The relationship is:

[0136]

[0137] like Fig. 9 As shown, the initial displacement S0 involved in the constitutive relationship is the horizontal sliding displacement when the first component 61 overcomes the static friction between it and the second component 62 and starts to slide.

[0138] When S1 is less than or equal to S0, the initial stiffness K1 is the ratio of the initial isolation force μ1P of the first component 61 to the initial displacement S0, that is:

[0139]

[0140] The seismic isolation starting force μ1P is the static friction force between the first component 61 and the second component 62 .

[0141] When S1 is greater than S0, the post-buckling stiffness K2 is the slope between the horizontal sliding displacement S1 of the first member 61 and the initial displacement S0, that is, the external horizontal force F H1 The difference between the initial isolation force μ1P and the horizontal sliding displacement S1 is divided by the difference between the initial displacement S0, that is:

[0142]

[0143] The horizontal reaction force corresponding to the horizontal sliding displacement S1 is the external horizontal force F H1 ; At the same time, the equivalent stiffness K eff It is also equal to the external horizontal force F H1 The ratio of the horizontal sliding displacement S1.

[0144] In another formula, the post-buckling stiffness K2 can also be calculated as follows:

[0145]

[0146] The post-buckling stiffness K2 of the connecting structure 100 and the vertical stiffness K V The relationship between them is as follows:

[0147]

[0148] The parameter setting method of each component is as follows.

[0149] There is a tangent relationship between the vertical compression displacement S2 of the disc spring assembly 3 and the horizontal sliding displacement S1 of the first component 61. The larger the inclination angle θ of the inclined surface 41 of the force transmission block 4, the larger the vertical compression displacement S of the disc spring assembly 3 when the horizontal sliding displacement S1 of the first component 61 remains unchanged.

[0150] Vertical reaction force F of disc spring assembly 3 V is the external horizontal force F H1 The product of the difference between the static friction force f1 generated by the external vertical force P and the force transmission coefficient α is H1 When the static friction force f1 and the inclination angle θ of the inclined surface 41 of the force transmission block 4 are both constant, the larger the inclination angle θ is, the smaller the force transmission coefficient α is, and the vertical reaction force F of the disc spring assembly 3 is V The smaller.

[0151] Horizontal reaction force F of the screw rod 11 of bolt 1 H2 The external horizontal force F H1 The product of the difference between the static friction force f1 generated by the external vertical force P and the force transmission coefficient β is H1When the static friction force f1 and the inclination angle θ of the inclined surface 41 of the force transmission block 4 are both constant, the larger the force transmission coefficient β is, the larger the horizontal reaction force F of the screw rod 11 of the bolt 1 is. H2 The bigger.

[0152] When the horizontal sliding displacement S1 of the first member 61 and the external horizontal force F H1 When the static friction force f1 and the static friction force f2 remain unchanged, the larger the inclination angle θ of the inclined surface 41 of the force transmission block 4 is, the greater the vertical reaction force F of the disc spring assembly 3 is. V The smaller the vertical compression displacement S2, the smaller the ratio of the two, that is, the vertical stiffness K of the disc spring assembly 3 V When the vertical compression displacement S2 of the disc spring assembly 3 is large, the free height of the disc spring assembly 3 before compression is also large, and the overall height H of the buffer structure is large. Figure 2 shown.

[0153] When the external horizontal force F H1 When both the static friction force f1 and the horizontal reaction force F of the screw rod 11 of the bolt 1 remain unchanged, H2 The vertical reaction force F of the disc spring assembly 3 V The relationship between the two and the inclination angle θ of the inclined surface 41 of the force transmission block 4 is negatively correlated; when the horizontal reaction force F of the screw rod 11 of the bolt 1 H2 When the vertical reaction force F of the disc spring assembly 3 decreases, V The vertical compression displacement S2 of the disc spring assembly 3 is small, and the vertical stiffness K V Larger.

[0154] When the disc spring body 32 is selected and designed, the first member 61 is subjected to the external horizontal force F H1 Under the action of the force transmission block 4, the disc spring assembly 3 generates a horizontal sliding displacement S1. According to formula (1.9), the disc spring assembly 3 generates a vertical compression displacement S2 under the action of the force transmission block 4. When the deformation of the disc spring assembly 3 is selected, its deformation f c Should be greater than or equal to S2. The n combined disc spring members 30 bear the vertical bearing force F v (vertical reaction force of disc spring assembly 3), the vertical bearing capacity of a single disc spring component 30 is F v / n. Therefore, the disc spring assembly 3 is designed so that each disc spring member 30 can withstand F v / n, the deformation requirement of disc spring assembly 3 is S2.

[0155] The diameter of the screw rod 11 is the nominal diameter of the bolt. According to the size of the screw rod 11, a disc spring 30 with a suitable inner diameter is selected. According to the disc spring design specification "Disc Spring" (GB / T 1972), the stiffness K of the disc spring assembly 3 is calculated. V .

[0156] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0157] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0158] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0159] Finally, it should be noted that the above is only a preferred embodiment of the present invention and does not constitute any limitation to the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for a person skilled in the art to modify the technical solutions described in the aforementioned embodiments or to replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for calculating parameters of a connecting structure, characterized in that: The vertical stiffness K of the elastic element of the connecting structure V The calculation formula is as follows: K V =F V / S2 in: F V is the vertical reaction force of the elastic element; S2 is the elastic element at F V Vertical compression displacement under the action of .

2. The parameter calculation method according to claim 1, characterized in that: The F V The calculation formula is as follows: F V =α(F H1 -μ1P) in: α is the force transmission coefficient of the elastic element; F H1 is the external horizontal force received by the first member of the connecting structure; μ1 is the sliding friction coefficient between the first member and the second member of the connecting structure; P is the vertical external force between the first member and the second member; The calculation formula of S2 is as follows: S2=S1tanθ in: S1 is the external horizontal force F of the first component H1 Horizontal sliding displacement under the action of θ is the inclination angle of the inclined surface of the force transmission block.

3. The parameter calculation method according to claim 2, characterized in that: The first member is subjected to an external horizontal force F H1 The calculation formula is as follows:

4. The parameter calculation method according to claim 3, characterized in that: The calculation formula of the equivalent stiffness of the first component of the connecting structure is as follows: in: K eff is the equivalent stiffness; F H1 is the external horizontal force applied to the first member; S1 is the external horizontal force F of the first component H1 Horizontal sliding displacement under the action of .

5. The parameter calculation method according to claim 1, characterized in that: The calculation formula of the initial stiffness K1 of the connecting structure is as follows: in: μ1 is the sliding friction coefficient between the first component of the connecting structure and the second component of the connecting structure; P is the vertical external force between the first member and the second member; S0 is the horizontal sliding displacement when the first member overcomes the static friction force and starts to slide.

6. The parameter calculation method according to claim 5, characterized in that: The calculation formula of the post-buckling stiffness K2 of the connecting structure is as follows: or in: α is the force transmission coefficient of the elastic element; S1 is the external horizontal force F of the first component H1 Horizontal sliding displacement under the action of , at this time S1 is greater than S0; F H1 is the external horizontal force received by the first member of the connecting structure; μ1 is the sliding friction coefficient between the first member and the second member of the connecting structure; P is the vertical external force between the first component and the second component.

7. The parameter calculation method according to any one of claims 2 to 4 or 6, characterized in that: The calculation formula of α is as follows: μ2 is the sliding friction coefficient between the inclined surface of the force transmission block of the connecting structure and the first member; μ3 is the sliding friction coefficient between the bolts of the connecting structure and the force transmission block; θ is the inclination angle of the inclined surface of the force transmission block.

8. The parameter calculation method according to claim 6, characterized in that: The post-buckling stiffness K2 of the connecting structure and the vertical stiffness K of the elastic element of the connecting structure V The relationship between them is as follows:

9. The parameter calculation method according to claim 1, characterized in that: The calculation method of the horizontal reaction force of the bolts connecting the structural parts is as follows: F H2 =β(F H1 -μ1P) in: F H2 is the horizontal reaction force of the bolt; β is the force transmission coefficient of the bolt; F H1 is the external horizontal force received by the first member of the connecting structure; μ1 is the sliding friction coefficient between the first member and the second member of the connecting structure; P is the vertical external force between the first component and the second component.

10. The parameter calculation method according to claim 9, characterized in that: The calculation formula of β is as follows: in: μ2 is the sliding friction coefficient between the inclined surface of the force transmission block of the connecting structure and the first member; θ is the inclination angle of the inclined surface of the force transmission block of the connecting structure.

11. A connecting structure suitable for the parameter calculation method according to any one of claims 1 to 10, characterized in that: Used to connect a first component (61) and a second component (62), comprising: A bolt (1), the bolt (1) comprising a screw rod (11) and a screw head (12), the screw rod (11) passing through the first component (61) and the second component (62) in sequence; A force transmission block (4) is arranged outside the screw rod (11), and the contact surfaces between the force transmission block (4) and the first component (61) are arranged as mutually matching inclined surfaces; An elastic element arranged on the outside of the screw rod (11), the elastic element being constructed as a disc spring assembly (3) and being located between the screw head (12) and the force transmission block (4); The disc spring assembly (3) comprises a guide ring (31) which is connected to the bolt (11) for guiding, and / or the disc spring assembly (3) comprises a guide cylinder (33) which is coaxially sleeved on the outside.

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