Device and method for obtaining dynamic characteristic parameters of steering gear pressure block O-ring

Abstract

The invention relates to the technical field of dynamic simulation test, and specifically to a device and method for obtaining dynamic characteristic parameters of an O-ring of a steering gear pressure block. A shell pad is fixed on a bottom plate, a shell is fixed on the shell pad, a side of the shell is provided with a penetrating cylindrical hole, a pressure block is fixed inside the cylindrical hole, a conversion plug is fixed at the end of the pressure block, a fixed bottom plate is mounted on a mounting table, the shell pad is connected to the bottom plate, the shell is radially mounted and axially mounted respectively according to the difference in radial parameter and axial stiffness parameter identification, a pressure block equipped with an O-ring is inserted into the shell, and connected to a force frame through an adapter, the force frame is connected to a tension and press machine through a force sensor, grooves of different sizes are arranged on the pressure block, which can meet the design of different O-ring compression amounts, has a simple structure, low manufacturing cost, is easy to disassemble and assemble, can realize the test of radial and axial dynamic characteristics of the O-ring of the steering gear pressure block, and improves the test accuracy.

Description

Technical Field

[0001] The invention relates to the technical field of dynamics simulation test, in particular to a device and method for acquiring dynamic characteristic parameters of an O-ring of a steering gear pressing block. Background Art

[0002] The O-ring of the pressure block is a kind of rubber material, which is an important damping element in the steering gear. It plays a key role in vibration reduction and noise reduction. Often in the design, the compression amount of the O-ring is changed by changing the size of the O-ring groove and the housing of the pressure block to change the movement characteristics of the pressure block in the housing in order to meet some design requirements.

[0003] The three-dimensional six-degree-of-freedom system dynamics model established for steering system noise analysis needs to fully consider the stiffness hysteresis characteristics of the O-ring of the pressure block. In order to identify the dynamic characteristic parameters of different O-ring designs, it is necessary to design a simple and reliable identification method and test device in combination with the working conditions and model characteristics of the noise analysis. At present, the field of dynamic simulation of steering system noise analysis has not yet matured, and there is a gap in parameter identification technology methods.

[0004] To this end, it is necessary to design an identification method and testing device that can meet the dynamic characteristic parameter identification of different pressure block O-ring groove designs in multiple dimensions of radial and axial directions. The disassembly and assembly testing method is simple and practical, and the data obtained is scientific and reliable. Summary of the invention

[0005] The present invention breaks through the difficulties of the prior art and designs an identification method and testing device that can meet the needs of dynamic characteristic parameter identification in multiple radial and axial dimensions for different compression block O-ring groove designs. The disassembly and assembly test is convenient, simple and practical, and the data obtained is scientific and reliable.

[0006] In order to achieve the above-mentioned purpose, the present invention designs a device for obtaining dynamic characteristic parameters of a steering gear pressure block O-ring, comprising: a bottom plate, a housing pad, a pressure block, a housing, and a conversion plug, characterized in that: a housing pad is fixed on the bottom plate, a housing is fixed on the housing pad, a penetrating cylindrical hole is provided on the side of the housing, a pressure block is fixed inside the cylindrical hole, and a conversion plug is fixed at the end of the pressure block;

[0007] The top of the shell cushion block is provided with four threaded holes 1, and the side of the shell cushion block is provided with two threaded holes 2;

[0008] When the housing is fixedly connected with the threaded hole, the pressing block passes through the cylindrical hole so that the two ends of the pressing block are exposed outside the cylindrical hole, and the conversion plug is fixed on the two ends of the pressing block. The top of the conversion plug is connected and fixed with a force-applying frame to form a device for obtaining the dynamic characteristic parameters of the radial O-ring.

[0009] When the shell is fixedly connected to the second threaded hole, the pressing block penetrates into the cylindrical hole, the bottom end of the pressing block is located inside the cylindrical hole, the top end of the pressing block extends out of the cylindrical hole, and the conversion plug is fixedly connected to the top end of the pressing block, forming a device for obtaining the dynamic characteristic parameters of the axial O-ring.

[0010] The pressing block is a cylindrical rod, a plurality of pairs of O-ring grooves are provided on the outer edge of the central position of the pressing block, and symmetrical mounting threaded holes are provided at both ends of the pressing block.

[0011] The housing is made of cast aluminum.

[0012] The depths of the plurality of pairs of O-ring grooves are different.

[0013] A method for obtaining dynamic characteristic parameters of an O-ring of a steering gear block, characterized in that it includes a method for obtaining radial O-ring dynamic characteristic parameters and a method for obtaining axial O-ring dynamic characteristic parameters, wherein the method for obtaining radial O-ring dynamic characteristic parameters is performed according to the following steps:

[0014] Step 1: Using a radial O-ring dynamic characteristic parameter acquisition device, two O-rings are symmetrically installed in O-ring grooves A and E of a pressing block, and the pressing block is inserted into a housing coated with grease;

[0015] Step 2: The housing is mounted and fixed on the top surface of the housing pad to form a device for acquiring the dynamic characteristic parameters of the radial O-ring;

[0016] Step 3: Place two displacement sensors symmetrically at both ends of the pressing block, arrange the force sensor above the force frame, and connect the displacement sensor and the force sensor to the digital signal acquisition instrument;

[0017] Step 4: Pull and press the force frame at a speed of 0.1mm / min, 2mm / min, and 10mm / min, respectively, with a force of plus or minus 300N, and record the data of each displacement sensor as Travel AE 1. Travel AE 2. Force sensor data is Force AE , obtain the radial stiffness dynamic characteristic parameters of the O-ring under the groove sizes of A and E;

[0018] Step 5: Install the two O-rings symmetrically in O-ring grooves B and D, and repeat steps 2-4 to obtain the radial stiffness dynamic characteristic parameters of the O-rings under the B and D groove sizes: Travel BD 1. Travel BD 2. Force BD ;

[0019] Step 6: Install the O-ring in the O-ring groove C again, and repeat the above steps 2-4 to obtain the radial stiffness dynamic characteristic parameters of the O-ring under the C groove size: Travel C 1. Travel C 2. Force C ;

[0020] Step 7: For the radial dynamic characteristic parameters of the O-rings in grooves A and E, B and D, we do the following: Take the average value of the data of the two displacement sensors Travel AE =(Travel AE 1+Travel AE 2) / 2、Travel BD =(Travel BD 1+Travel BD 2) / 2, the data of the force sensor is half of the force AE =Force AE / 2, force BD =Force BD / 2, then draw the force and displacement curves according to the calculated data, and obtain the radial dynamic characteristic parameter curves of the single O-rings in grooves A and E, B and D. From the curves, extract the stiffness and initial preload of the O-ring under this design. Similarly, obtain the radial dynamic characteristic parameter curve of the O-ring in groove C, and extract the corresponding stiffness and preload parameters.

[0021] Step 8: Fit the curves of groove depth and stiffness, groove depth and preload, through which the radial dynamic characteristic parameters of any O-ring groove depth can be obtained.

[0022] The method for obtaining the dynamic characteristic parameters of the axial O-ring is as follows:

[0023] Step 1: Using the device for acquiring the dynamic characteristic parameters of the axial O-ring, an O-ring is installed in the O-ring groove A of the pressing block, and the pressing block is inserted from bottom to top into the housing coated with grease;

[0024] Step 2: Arrange the displacement sensor on the top of the pressing block, arrange the force sensor on the top of the force frame, and connect the displacement sensor and the force sensor to the digital signal acquisition instrument;

[0025] Step 3: Pull and press the force frame at a speed of 0.1 mm / min, 2 mm / min, and 10 mm / min, with a displacement of plus or minus 0.3 mm, and record the displacement sensor data as TravelA' and the force sensor data as ForceA';

[0026] Step 4: Install the O-ring in the O-ring groove B again, repeat the above steps 2-3, and obtain the displacement sensor data in the O-ring groove B as TravelB' and the force sensor data as ForceB';

[0027] Step 5: Install the O-ring in the O-ring groove C again, repeat the above steps 2-3, and obtain the displacement sensor data in the O-ring groove C as TravelC' and the force sensor data as ForceC';

[0028] Step 6: Draw the force and displacement curves of the corresponding O-rings of grooves A, B and C respectively, obtain the corresponding axial dynamic characteristic parameter curve of the O-ring, and extract the stiffness and preload of the O-ring from the curve;

[0029] Step 7: Fit the curves of groove depth and stiffness, groove depth and preload, through which the dynamic characteristic parameters of any O-ring groove depth can be obtained.

[0030] Compared with the prior art, the present invention has the following advantages:

[0031] The steering gear pressure block O-ring dynamic characteristics testing device of the present invention has a fixed base plate installed on a mounting table, a shell gasket is connected to the base plate, and the shell is radially and axially installed respectively according to the difference in radial parameter and axial stiffness parameter identification. The pressure block equipped with the O-ring is inserted into the shell and connected to the force frame through an adapter. The force frame is connected to the tension and press machine through a force sensor. The structure is simple, the manufacturing cost is low, and it is easy to disassemble and assemble, and the radial and axial dynamic characteristics of the steering gear pressure block O-ring can be tested.

[0032] The steering gear pressing block O-ring dynamic characteristic testing device of the present invention has grooves of different sizes arranged on the pressing block, which can meet the design of different O-ring compression amounts; because the grooves are arranged in a mirror image through the central surface of the pressing block, the radial test force is uniform and not easy to tilt, thereby improving the test accuracy.

[0033] In the steering gear pressing block O-ring dynamic characteristic testing method of the present invention, during the radial dynamic parameter testing process, displacement sensors are symmetrically arranged on both sides of the pressing block, and the displacement is taken as the average of the two sensors, thereby further improving the testing accuracy.

[0034] The steering gear pressing block O-ring dynamic characteristic parameter identification method of the present invention extracts information points through curve data processing, performs data fitting by the least square method, and obtains a fitting equation, which can be used to calculate and obtain the dynamic characteristic parameters of any steering gear pressing block O-ring groove design. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of the structure of the device for acquiring the dynamic characteristic parameters of the radial O-ring in the present invention.

[0036] Figure 2 It is a schematic diagram of the structure of the device for acquiring the dynamic characteristic parameters of the axial O-ring in the present invention.

[0037] Figure 3 It is a cross-sectional view of the pressed block in the present invention.

[0038] Figure 4 It is a schematic diagram of extracting parameter information from force and displacement data in a specific embodiment of the present invention.

[0039] Figure 5 It is a schematic diagram of the fitting curve and equation of different O-ring groove designs and dynamic characteristic parameters of the pressing block in the specific embodiment of the present invention. DETAILED DESCRIPTION

[0040] The present invention is further described in conjunction with the accompanying drawings.

[0041] See also Figure 1~2 The present invention designs a device for obtaining dynamic characteristic parameters of a steering gear pressure block O-ring, comprising: a base plate, a shell cushion block 5, a pressure block 4, a shell 3, and a conversion plug 2. The base plate 6 is installed on a mounting platform, the shell cushion block 5 is fixed on the base plate 6, the shell 3 is fixed on the shell cushion block 5, a penetrating cylindrical hole is provided on the side of the shell 3, a pressure block 4 is fixed inside the cylindrical hole, and a conversion plug 2 is fixed on the end of the pressure block 4.

[0042] According to the difference in the identification of radial parameters and axial stiffness parameters, the shell 3 is fixed transversely and longitudinally respectively to form a radial O-ring dynamic characteristic parameter acquisition device and an axial O-ring dynamic characteristic parameter acquisition device. Then, the pressure block 4 equipped with the O-ring is inserted into the shell 3 and connected to the force frame 1 through the conversion plug 2. The force frame 1 is connected to the tension and press through the force sensor, so as to test the radial dynamic characteristic parameters. For the test of the axial characteristics, the conversion plug 2 is directly connected to the tension and press through the force sensor.

[0043] In the present invention, the bottom of the shell cushion block 5 is provided with 4 fixing threaded holes, which can fix it on the base plate 6, the top is provided with 4 threaded holes 1, and the side of the shell cushion block 5 is provided with 2 threaded holes 2, which are used to fix the shell 3 horizontally and vertically respectively.

[0044] When the housing 3 is fixedly connected to the threaded hole, the pressure block 4 passes through the cylindrical hole so that both ends of the pressure block 4 are exposed outside the cylindrical hole, and the conversion plug 2 is fixed on both ends of the pressure block 4. The top of the conversion plug 2 is connected and fixed with a force frame 1, forming a device for obtaining the dynamic characteristic parameters of the radial O-ring.

[0045] When the housing 3 is fixedly connected to the second threaded hole, the pressure block 4 penetrates into the cylindrical hole, the bottom end of the pressure block 4 is located inside the cylindrical hole, and the top end of the pressure block 4 extends out of the cylindrical hole, and the conversion plug 2 is fixedly connected to the top end of the pressure block 4, forming a device for obtaining the dynamic characteristic parameters of the axial O-ring.

[0046] See also Figure 3 In the present invention, the pressure block 4 is a cylindrical aluminum rod with a diameter of 34.96 mm. The outer edge of the central position of the pressure block 4 is provided with a plurality of pairs of O-ring grooves of different depths. These grooves are numbered as ABCDE from left to right, wherein the groove depths of A and E are 3.35 mm, the groove depths of B and D are 3.45 mm, and the groove depth of C is 3.40 mm. A and E, B and D are mirror images distributed on both sides of the center plane of the cylinder, thus ensuring the uniformity of the force in the radial dynamic characteristic parameter test; symmetrical threaded holes are provided at both ends of the pressure block 4 for easy connection with the force frame 1 and the sensor.

[0047] In the present invention, the shell 3 is made of cast aluminum material and has a hexahedral shape. There is a cylindrical hole with a diameter of 35.008 mm in the center, and four mounting holes are located at four corners to facilitate installation and fixation with the shell pad 5.

[0048] The present invention also designs a method for obtaining dynamic characteristic parameters of the steering gear pressing block O-ring, including a method for obtaining radial O-ring dynamic characteristic parameters and a method for obtaining axial O-ring dynamic characteristic parameters, wherein the method for obtaining radial O-ring dynamic characteristic parameters is performed according to the following steps:

[0049] Step 1: Use a device for acquiring radial O-ring dynamic characteristic parameters to symmetrically install two O-rings in O-ring groove A and O-ring groove E of a pressing block 4, and insert the pressing block 4 into a housing 3 coated with grease.

[0050] Step 2: The housing 3 is mounted and fixed on the top surface of the housing pad 5 to form a device for acquiring the dynamic characteristic parameters of the radial O-ring.

[0051] Step 3: Place two displacement sensors symmetrically at both ends of the pressing block 4, arrange the force sensor above the force frame 1, and connect the displacement sensor and the force sensor to the digital signal acquisition instrument.

[0052] Step 4: Pull and press the force frame 1 at a speed of 0.1mm / min, 2mm / min, and 10mm / min, respectively, with a force of positive and negative 300N, and record the data of each displacement sensor as Travel AE 1. Travel AE 2. Force sensor data is Force AE , and obtain the radial stiffness dynamic characteristic parameters of the O-ring under the A and E groove sizes.

[0053] Step 5: Install the two O-rings symmetrically in O-ring grooves B and D, and repeat steps 2-4 to obtain the radial stiffness dynamic characteristic parameters of the O-rings under the B and D groove sizes: Travel BD 1. Travel BD 2. Force BD .

[0054] Step 6: Install the O-ring in the O-ring groove C again, and repeat the above steps 2-4 to obtain the radial stiffness dynamic characteristic parameters of the O-ring under the C groove size: Travel C 1. Travel C 2. Force C .

[0055] Step 7: For the radial dynamic characteristic parameters of the O-rings in grooves A and E, B and D, we do the following: Take the average value of the data of the two displacement sensors Travel AE =(Travel AE 1+Travel AE 2) / 2、Travel BD =(Travel BD 1+Travel BD 2) / 2, the data of the force sensor is half of the force AE =Force AE / 2, force BD =Force BD / 2, then according to the calculated data, the force and displacement curves are plotted to obtain the radial dynamic characteristic parameter curve of a single O-ring with a 4-groove depth design of a 3.35mm and 3.45mm pressure block, and the stiffness and initial preload of the O-ring under this design are extracted from the curve, as shown in Figure 4 shown.

[0056] Similarly, the radial dynamic characteristic parameter curve of the C-groove O-ring is calculated and the corresponding stiffness and preload parameters are extracted.

[0057] Step 8: Fit the curves of groove depth and stiffness, groove depth and preload, through which the radial dynamic characteristic parameters of any O-ring groove depth can be obtained.

[0058] Finally, the dynamic characteristic model of the corresponding test is established, and the obtained parameters are substituted. The simulation results are compared with the test curves to make fine adjustments to the parameters.

[0059] The method for obtaining the dynamic characteristic parameters of the axial O-ring in the present invention is as follows:

[0060] Step 1: Using the device for acquiring the dynamic characteristic parameters of the axial O-ring, an O-ring is installed in the O-ring groove A of the pressing block 4, and the pressing block 4 is inserted from bottom to top into the housing 3 coated with grease.

[0061] Step 2: Arrange the displacement sensor on the top of the pressing block 4, arrange the force sensor on the top of the force frame 1, and connect the displacement sensor and the force sensor to the digital signal acquisition instrument.

[0062] Step 3: Pull and press the force frame 1 at a displacement of plus or minus 0.3 mm at speeds of 0.1 mm / min, 2 mm / min, and 10 mm / min, respectively, and record the displacement sensor data as TravelA' and the force sensor data as ForceA'.

[0063] Step 4: Install the O-ring in the O-ring groove B again, repeat the above steps 2-3, and obtain the displacement sensor data in the O-ring groove B as TravelB' and the force sensor data as ForceB'.

[0064] Step 5: Install the O-ring in the O-ring groove C again, repeat the above steps 2-3, and obtain the displacement sensor data in the O-ring groove C as TravelC' and the force sensor data as ForceC'.

[0065] Step 6: Draw the force and displacement curves of the corresponding O-rings of grooves A, B and C respectively, obtain the corresponding O-ring axial dynamic characteristic parameter curve, and extract the O-ring stiffness and preload from the curve, such as Figure 5 shown.

[0066] Step 7: Use the least squares method to fit the curves of groove depth and stiffness, groove depth and preload, and obtain the polynomial fitting equation. The dynamic characteristic parameters such as axial stiffness and preload corresponding to any pressure block 4 O-ring design can be calculated through the fitting equation. Finally, establish the dynamic simulation model of the corresponding test, substitute the obtained parameters, and compare the simulation results with the test curves to make fine adjustments to the parameters.

Claims

1. A method for obtaining dynamic characteristic parameters of a steering gear pressing block O-ring, characterized in that: The device for obtaining the dynamic characteristic parameters of the steering gear pressure block O-ring comprises a base plate, a housing pad, a pressure block, a housing, and a conversion plug. The base plate (6) is fixed with a housing pad (5), the housing (3) is fixed with the housing pad (5), the side of the housing (3) is provided with a penetrating cylindrical hole, the inside of the cylindrical hole is fixed with a pressure block (4), and the end of the pressure block (4) is fixed with a conversion plug (2); the top of the housing pad (5) is provided with four threaded holes one, and the side of the housing pad (5) is provided with two threaded holes two; when the housing (3) is fixedly connected with the threaded hole one, the pressure block (4) passes through the cylindrical hole so that the two ends of the pressure block (4) are exposed outside the cylindrical hole, and the conversion plug (2) is fixed to the two ends of the pressure block (4). The conversion plug (2) is connected to the end, and the force frame (1) is fixedly connected to the top of the conversion plug (2), forming a device for obtaining the radial O-ring dynamic characteristic parameters; when the housing (3) is fixedly connected to the second threaded hole, the pressure block (4) penetrates into the cylindrical hole, the bottom end of the pressure block (4) is located inside the cylindrical hole, and the top end of the pressure block (4) protrudes from the cylindrical hole, and the conversion plug (2) is fixedly connected to the top end of the pressure block (4), forming a device for obtaining the axial O-ring dynamic characteristic parameters, and the outer edge of the central position of the pressure block (4) is provided with a plurality of pairs of O-ring grooves of different depths, and these grooves are numbered ABCDE from left to right, A and E, B and D are mirror-distributed on both sides of the central plane of the cylinder, and the grooves are mirror-distributed through the central plane of the pressure block; The invention comprises a method for obtaining radial O-ring dynamic characteristic parameters and a method for obtaining axial O-ring dynamic characteristic parameters, wherein the method for obtaining radial O-ring dynamic characteristic parameters is performed according to the following steps: Step 1: using a device for obtaining radial O-ring dynamic characteristic parameters, two O-rings are symmetrically installed in O-ring grooves A and E of a pressure block (4), and the pressure block (4) is inserted into a housing (3) coated with grease; Step 2: the housing (3) is installed and fixed on the top surface of a housing pad (5) to form a device for obtaining radial O-ring dynamic characteristic parameters; Step 3: two displacement sensors are symmetrically installed at both ends of the pressure block (4), a force sensor is arranged above a force frame (1), and the displacement sensor and the force sensor are connected to a digital signal acquisition instrument; Step 4: the force frame (1) is pulled and pressed at a speed of 0.1 mm / min, 2 mm / min, and 10 mm / min, respectively, and a force of positive and negative 300 N is recorded as the data of each displacement sensor. AE 1. Travel AE 2. Force sensor data is Force AE , obtain the radial stiffness dynamic characteristic parameters of the O-ring under the groove size of A and E; Step 5: Then install the two O-rings symmetrically in the O-ring groove B and O-ring groove D, repeat the above steps 2-4, and obtain the radial stiffness dynamic characteristic parameters of the O-ring under the groove size of B and D: BD 1. Travel BD 2. Force BD ; Step 6: Install the O-ring in the O-ring groove C again, and repeat the above steps 2-4 to obtain the radial stiffness dynamic characteristic parameters of the O-ring under the C groove size: Travel C 1. Travel C 2. Force C ; Step 7: For the radial dynamic characteristic parameters of the O-rings in grooves A and E, B and D, the following processing is performed: the data of the two displacement sensors are averaged Travel AE =(Travel AE 1+Travel AE 2) / 2、Travel BD =(Travel BD 1+Travel BD 2) / 2, the data of the force sensor is half of the force AE =Force AE / 2, force BD =Force BD / 2, then draw the force and displacement curves according to the calculated data, and obtain the radial dynamic characteristic parameter curves of a single O-ring in grooves A and E, B and D, and extract the O-ring stiffness and initial preload from the curves. Similarly, obtain the radial dynamic characteristic parameter curves of the O-ring in groove C, and extract the corresponding stiffness and preload parameters; Step 8: Fit the curves of groove depth and stiffness, groove depth and preload, and obtain the radial dynamic characteristic parameters of any O-ring groove depth through the curves, establish the dynamic simulation model of the corresponding test, and substitute the obtained parameters, compare the simulation results with the test curves to make fine adjustments to the parameters.

2. The method for obtaining dynamic characteristic parameters of a steering gear pressing block O-ring according to claim 1, characterized in that: The pressing block (4) is a cylindrical rod, and symmetrical mounting threaded holes are provided at both ends of the pressing block (4).

3. The method for obtaining dynamic characteristic parameters of a steering gear pressing block O-ring according to claim 1, characterized in that: The housing (3) is made of cast aluminum material.

4. The method for obtaining dynamic characteristic parameters of a steering gear pressing block O-ring according to claim 1, characterized in that: The method for obtaining the dynamic characteristic parameters of the axial O-ring is as follows: Step 1: Using the device for obtaining the dynamic characteristic parameters of the axial O-ring, an O-ring is installed in the O-ring groove A of the pressure block (4), and the pressure block (4) is inserted from bottom to top into the greased housing (3); Step 2: A displacement sensor is arranged at the top of the pressure block (4), a force sensor is arranged above the force frame (1), and the displacement sensor and the force sensor are connected to a digital signal acquisition instrument; Step 3: The force frame (1) is pulled and pressed at a speed of 0.1 mm / min, 2 mm / min, and 10 mm / min, respectively, with a displacement of plus or minus 0.3 mm, and the displacement sensor data is recorded as TravelA' and the force sensor data is recorded as ForceA'; Step 4: The O-ring is installed in the O-ring groove B again, and the above-mentioned method for obtaining the dynamic characteristic parameters of the axial O-ring is repeated. Method step 2-3, obtain the displacement sensor data in the O-ring groove B as TravelB', and the force sensor data as ForceB'; Step 5: install the O-ring in the O-ring groove C again, repeat the above-mentioned method for obtaining the axial O-ring dynamic characteristic parameters steps 2-3, obtain the displacement sensor data in the O-ring groove C as TravelC', and the force sensor data as ForceC'; Step 6: draw the force and displacement curves of the corresponding O-rings of grooves A, B and C respectively, obtain the corresponding O-ring axial dynamic characteristic parameter curves, and extract the O-ring stiffness and preload from the curves; Step 7: fit the curves of groove depth and stiffness, groove depth and preload, and obtain the dynamic characteristic parameters of any O-ring groove depth through the curve, establish a dynamic simulation model of the corresponding experiment, and substitute the obtained parameters, compare the simulation results with the test curves to make fine adjustments to the parameters.

Images