CN115544776A - ADAMS-based dynamic analysis method for rubber buffer base - Google Patents

ADAMS-based dynamic analysis method for rubber buffer base Download PDF

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CN115544776A
CN115544776A CN202211262107.4A CN202211262107A CN115544776A CN 115544776 A CN115544776 A CN 115544776A CN 202211262107 A CN202211262107 A CN 202211262107A CN 115544776 A CN115544776 A CN 115544776A
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spring
adams
rubber
hole
shock absorber
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涂勇强
吴志聪
林建明
何凯伦
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Fujian Xinghai Communication Technology Co Ltd
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Fujian Xinghai Communication Technology Co Ltd
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Abstract

The invention discloses an ADAMS-based dynamic analysis method for a rubber buffer base, which comprises the following steps of: s1, establishing a three-dimensional model of a rubber buffer base, and importing the three-dimensional model into ADAMS software; the three-dimensional model comprises a first combination body and a rubber shock absorber; s2, setting a first physical parameter of the first assembly in ADAMS software, and creating a constraint; s3, establishing a spring assembly in ADAMS software and setting spring parameters for simulating the rubber shock absorber; s4, creating measurement parameters of a buffer stroke and buffer efficiency in ADAMS software; and S5, setting an external impact condition in ADAMS software, and performing simulation to obtain the results of the buffer stroke and the buffer efficiency of the rubber buffer base. The problems of complex modeling, complex dynamic analysis derivation process and complex calculation existing in the conventional dynamic analysis method for the rubber buffer base are solved, so that the application operation is simple and convenient, the result is reliable, the precision is high, and the method has better practicability.

Description

ADAMS-based dynamic analysis method for rubber buffer base
Technical Field
The invention relates to the technical field of dynamics analysis of a land inertial navigation buffer base, in particular to an ADAMS-based dynamics analysis method of a rubber buffer base.
Background
The land inertial navigation provides autonomous, real-time and accurate navigation information including position, speed and attitude for a land vehicle, and is widely applied to land vehicles and corresponding weaponry. However, in an actual vehicle-mounted application environment, the impact seriously degrades the accuracy and service life of the land inertial navigation, and there is a risk of damaging the equipment. In order to deal with the influence of impact on the inertial navigation precision and the service life, a buffer base needs to be equipped for inertial navigation in use in an impact environment, and the rubber shock absorber has the advantages of high bearing capacity, low cost, good performance, small volume and flexible design, and meets the design requirements of miniaturization and high buffer efficiency of the land-used inertial navigation buffer base. Therefore, a rubber cushion base based on a rubber damper becomes the mainstream cushion base of the land inertial navigation.
The buffer stroke and the buffer efficiency are important indexes of the rubber buffer base, and in order to predict the buffer stroke and the buffer efficiency in the design stage of the land inertial navigation rubber buffer base, dynamic analysis needs to be performed on the rubber buffer base, for example, an analytic dynamic model of the rubber buffer base is constructed in the invention application CN112668191A, and the buffer stroke and the buffer efficiency of the rubber buffer base are obtained by respectively utilizing an analytic method in the invention applications CN112762136A and CN 112765740A.
However, the existing dynamics analysis method for the rubber buffer base has the problems of complex modeling, complex dynamics analysis derivation process, complex calculation and unfavorable engineering use. ADAMS software is powerful virtual prototype dynamics analysis software, does not need an operator to carry out complex dynamics analysis deduction, and can simply, conveniently, quickly and completely carry out dynamics analysis on a complex mechanical system. For example, an invention patent CN107341313B provides an ADAMS-based planetary gear train nonlinear dynamics modeling method, and an invention patent CN111914437B discloses an ADAMS-based simulation method of Yizhichan massage dynamics. Therefore, the dynamic analysis method based on ADAMS is expected to solve the problems of the existing dynamic analysis method of the rubber buffer base.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the dynamic analysis method solves the problems that an existing dynamic analysis method for the rubber buffer base is complex in modeling, needs a complex dynamic analysis derivation process, is complex in calculation and is not beneficial to engineering use.
In order to solve the technical problem, the invention adopts a technical scheme that:
an ADAMS-based rubber buffer base kinetic analysis method comprises the following steps:
s1, establishing a three-dimensional model of a rubber buffer base, and importing the three-dimensional model into ADAMS software; the three-dimensional model comprises a first combination body and a rubber shock absorber;
s2, setting a first physical parameter of the first assembly in ADAMS software, and creating a constraint;
s3, establishing a spring assembly in ADAMS software and setting spring parameters for simulating the rubber shock absorber;
s4, creating measurement parameters of a buffer stroke and buffer efficiency in ADAMS software;
and S5, setting an external impact condition in ADAMS software, and performing simulation to obtain the results of the buffer stroke and the buffer efficiency of the rubber buffer base.
The invention has the beneficial effects that: the ADAMS software is utilized to carry out simple, convenient and accurate dynamics analysis on the dynamics analysis of the rubber buffer base needing complex dynamics derivation, the method has the advantages of simple modeling, no need of complex dynamics analysis derivation process, quick calculation and convenience for engineering use, and the problems of complex modeling, complex dynamics analysis derivation process, complex calculation and inconvenience for engineering use existing in the conventional dynamics analysis method for the rubber buffer base are solved, so that the method is simple and convenient to apply and operate, reliable in result and high in precision, is convenient to popularize in engineering, and has better practicability.
Drawings
FIG. 1 is a flow chart of an ADAMS-based method for dynamic analysis of rubber buffer bases according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a rubber buffer base according to an embodiment of the present invention;
FIG. 3 is an exploded view of the rubber buffer base according to the embodiment of the present invention;
FIG. 4 is a schematic perspective view of an inertial navigation and support assembly constructed in step S1 according to an ADAMS-based dynamic analysis method of a rubber buffer base according to an embodiment of the present invention;
FIG. 5 is a schematic perspective view of the three-dimensional model of the rubber buffer base created in step S1 by the ADAMS-based dynamic analysis method for the rubber buffer base according to the embodiment of the present invention;
FIG. 6 is a schematic top view of the three-dimensional model of the rubber buffer base created in step S1 by the ADAMS-based dynamic analysis method for the rubber buffer base according to the embodiment of the present invention;
FIG. 7 is a schematic diagram of an interface for setting physical parameters of an inertial navigation and support combination in ADAMS software in step S2 according to an embodiment of the present invention;
FIG. 8 is a schematic diagram of the springs added in step S3 of an ADAMS-based dynamic analysis method for a rubber cushioning base according to an embodiment of the present invention;
FIG. 9 is a schematic diagram of an interface for setting linear spring parameters in ADAMS software in step S3 according to an embodiment of the present invention;
FIG. 10 is a schematic diagram of an interface for setting torsion spring parameters in ADAMS software in step S3 according to an embodiment of the present invention;
FIG. 11 is a schematic view of an interface for adding a buffer stroke measurement to ADAMS software in step S4 according to an embodiment of the present invention;
FIG. 12 is a schematic interface diagram illustrating the measurement of the buffering effect added to the ADAMS software in step S4 according to the embodiment of the present invention;
FIG. 13 is a schematic diagram of an interface for setting an external shock condition in the ADAMS software in step S5 according to the embodiment of the present invention;
FIG. 14 is a schematic diagram of an interface for setting simulation time and step number in ADAMS software in step S5 according to an embodiment of the present invention;
FIG. 15 is a diagram illustrating the component of the displacement of the gravity center of the land inertial navigation system relative to the gravity center of the bottom plate in the OY direction, which is obtained in ADAMS software by using the method of the present invention according to the embodiment of the present invention;
FIG. 16 is a schematic diagram of OZ component of the displacement of the gravity center of the land inertial navigation system relative to the gravity center of the bottom plate obtained in ADAMS software by using the method of the present invention;
FIG. 17 is a schematic diagram of the acceleration of the gravity center of the land inertial navigation system obtained in ADAMS software by using the method of the present invention;
FIG. 18 is a schematic illustration of a test environment for testing validation performed by a method of the present invention, in accordance with an embodiment of the present invention;
description of reference numerals:
1. inertial navigation on land; 2. a support; 201. the rubber shock absorber is provided with a through hole; 3. a rubber vibration damper; 4. a support pillar; 5. a base plate; 6. inertial navigation and support combinations; 7. a first spring applying transition plate; 701. a first through hole; 8. a second spring applies a transition plate; 801. a second through hole; 9. a linear spring; 10. a torsion spring; 11. a table top of the impact table; 12. an impact table; 13. an acceleration sensor; 14. an acceleration sensor signal line; 15. land inertial navigation signal lines; 16. and a data acquisition computer.
Detailed Description
In order to explain technical contents, achieved objects, and effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.
Referring to fig. 1, an ADAMS-based dynamic analysis method for a rubber buffer base includes the following steps:
s1, establishing a three-dimensional model of a rubber buffer base, and importing the three-dimensional model into ADAMS software; the three-dimensional model comprises a first combination body and a rubber shock absorber;
s2, setting a first physical parameter of the first combination in ADAMS software, and creating constraint;
s3, establishing a spring assembly in ADAMS software and setting spring parameters for simulating the rubber shock absorber;
s4, creating measurement parameters of a buffer stroke and buffer efficiency in ADAMS software;
and S5, setting an external impact condition in ADAMS software, and performing simulation to obtain the results of the buffer stroke and the buffer efficiency of the rubber buffer base.
As can be seen from the above description, the beneficial effects of the present invention are: the ADAMS software is utilized to carry out simple, convenient and accurate dynamics analysis on the dynamics analysis of the rubber buffer base needing complex dynamics derivation, the method has the advantages of simple modeling, no need of complex dynamics analysis derivation process, quick calculation and convenience for engineering use, and the problems of complex modeling, complex dynamics analysis derivation process, complex calculation and inconvenience for engineering use existing in the conventional dynamics analysis method for the rubber buffer base are solved, so that the method is simple and convenient to apply and operate, reliable in result and high in precision, is convenient to popularize in engineering, and has better practicability.
Referring to fig. 2 to 6, further, the step S1 specifically includes the following steps:
s101, establishing parts required by a three-dimensional model of the rubber buffer base in three-dimensional design software, wherein the parts comprise an inertial navigation device, a support column, a bottom plate and a rubber shock absorber;
the supporting columns are fixed on the bottom plate and are arranged in a rectangular shape; the support is arranged on the supporting column; the rubber shock absorber is positioned between the supporting column and the bracket; the gravity center of the inertial navigation device is superposed with the center of a rectangle formed by the arrangement positions of the rubber shock absorbers;
s102, the first combination body is formed by combining the inertial navigation device and the support;
s103, the part further comprises a first spring applying transition plate and a second spring applying transition plate, and the first assembly body, the support column, the bottom plate, the first spring applying transition plate and the second spring applying transition plate are combined to form a first assembly body.
Further, the parts in step S1 are specifically:
the mounting plate is arranged in the length direction of the support, a rubber shock absorber mounting through hole is formed in the mounting plate, and the support and the rubber shock absorber are fixed with each other through the rubber shock absorber mounting through hole;
the axis of the rubber shock absorber mounting through hole is superposed with the vertical center line of the top surface of the supporting column;
the first spring applying transition plate and the second spring applying transition plate are both rectangular plates, the first spring applying transition plate is provided with a first through hole, and the second spring applying transition plate is provided with a second through hole;
the placing direction of the transition plate applied by the first spring is as follows: the axial direction of the first through hole is made to coincide with the length direction of the rubber buffer base, and the axial line of the first through hole passes through the central point of the rubber shock absorber mounting through hole;
the placing direction of the transition plate applied by the second spring is as follows: and the axis direction of the second through hole is coincided with the width direction of the rubber buffer base, and the axis of the second through hole passes through the central point of the rubber shock absorber mounting through hole.
From the above description, it can be known that the gravity center of the inertial navigation and support combination body is lowered into the vibration reduction plane formed by the central points of the four rubber vibration absorbers, and the dynamic coupling is reduced.
Further, the constraints created in step S2 include: the support column and the bottom plate are fixedly constrained, the bottom plate and the first spring exert a transition plate, and the bottom plate and the second spring exert a transition plate.
Referring to fig. 8 to 10, further, the creating of the spring assembly and the setting of the spring parameters in the ADAMS software in step S3 specifically include: dividing the added springs into a plurality of spring groups, wherein one spring group corresponds to one supporting column.
Further, creating a spring assembly in the ADAMS software in step S3 and setting spring parameters specifically include:
the spring set comprises a first linear spring, a second linear spring, a third linear spring, a first torsion spring, a second torsion spring and a third torsion spring;
one ends of the first linear spring, the second linear spring and the third linear spring are all fixed at the center of the rubber shock absorber mounting through hole of the bracket; the other end of the first linear spring is positioned in the center of the first through hole, the other end of the second linear spring is positioned in the center of the second through hole, and the other end of the third linear spring is positioned in the center of the top surface of the supporting column;
one ends of the axes of the first torsion spring, the second torsion spring and the third torsion spring are all fixed at the center of the rubber shock absorber mounting through hole; the other end of the first torsion spring is positioned in the center of the first through hole, the other end of the second torsion spring is positioned in the center of the second through hole, and the other end of the third torsion spring is positioned in the center of the top surface of the supporting column;
wherein the first, second and third linear springs have a stiffness k l Uniformity, damping c l The same; stiffness k of the first, second and third torsion springs r Uniformity, damping c r The same is true.
Referring to fig. 7, further, step S2 specifically includes: setting physical parameters of the first combination in ADAMS software including mass weight m and moment of inertia I O 。
Further, the moment of inertia I O The method specifically comprises the following steps:
Figure BDA0003891478970000061
wherein, I xx 、I xy 、I xz 、I yx 、I yy 、I yz 、I zx 、I zy And I zz Respectively, moment of inertia I O A component in a first row and a first column, a first row and a second column, a first row and a third column, a second row and a first column, a second row and a second column, a second row and a third column, a third row and a first column, a third row and a second column, and a third row and a third column.
According to the description, the scheme is simple in modeling and convenient to apply to engineering.
Referring to fig. 11 and 12, further, step S4 specifically includes: the created measurement parameter of the buffer stroke is the relative displacement change of the gravity center of the land inertial navigation device relative to the gravity center of the bottom plate; the created measurement parameter of the buffering efficiency is the ratio of the maximum acceleration of the gravity center of the land inertial navigation device to the maximum acceleration on the bottom plate.
Referring to fig. 13 to 17, further, step S5 specifically includes:
s501, applying linear displacement drive of the bottom plate relative to the ground on the bottom plate, and inputting an acceleration function of external impact in the linear displacement drive;
and S502, simulating to obtain the results of the buffering stroke and the buffering efficiency of the rubber buffering base.
According to the above description, the scheme does not need a complex dynamics analysis derivation process, the calculation is faster, the result is reliable, and the precision is high.
The ADAMS-based dynamic analysis method for the rubber buffer base can solve the problems that the existing dynamic analysis method for the rubber buffer base is complex in modeling, needs a complex dynamic analysis derivation process, is complex in calculation and is not beneficial to engineering use, and is explained by a specific implementation mode as follows:
example one
Referring to fig. 1, an ADAMS-based dynamic analysis method for a rubber buffer base includes the following steps:
s1, establishing a three-dimensional model of a rubber buffer base, and importing the three-dimensional model into ADAMS software; the three-dimensional model comprises a first combination body and a rubber shock absorber;
s2, setting a first physical parameter of the first assembly in ADAMS software, and creating a constraint;
s3, establishing a spring assembly in ADAMS software and setting spring parameters for simulating the rubber shock absorber;
s4, creating measurement parameters of a buffer stroke and buffer efficiency in ADAMS software;
and S5, setting an external impact condition in ADAMS software, and performing simulation to obtain the results of the buffer stroke and the buffer efficiency of the rubber buffer base.
Wherein, step S1 specifically includes the following steps:
s101, establishing parts required by a three-dimensional model of the rubber buffer base in three-dimensional design software, wherein the parts comprise an inertial navigation device, a support column, a bottom plate and a rubber shock absorber;
the supporting columns are fixed on the bottom plate and are arranged in a rectangular shape; the bracket is arranged on the supporting column; the rubber shock absorber is positioned between the supporting column and the bracket; the gravity center of the inertial navigation device is superposed with the center of a rectangle formed by the arrangement positions of the rubber shock absorbers;
s102, the first combination body is formed by combining the inertial navigation device and the support;
s103, the part further comprises a first spring applying transition plate and a second spring applying transition plate, and the first assembly body, the support column, the bottom plate, the first spring applying transition plate and the second spring applying transition plate are combined to form a first assembly body.
Specifically, referring to fig. 4, the three-dimensional design software selected is Solidworks, and the operation of combining the land inertial navigation system 1 and the support 2 into a single component assembly 6 in the three-dimensional design software is as follows: firstly, opening a land inertial navigation 1 part in Solidworks software; then, selecting 'inserting' in a toolbar, clicking 'parts' to insert parts of the support 2, and installing the land inertial navigation part 1 on the parts of the support 2 according to actual installation conditions through a constraint relation; finally, clicking 'insert' characteristic 'combination' in a tool bar, and storing a single part file named as 'inertial navigation and support combination' to finish combining the land inertial navigation system 1 and the support 2 into a single part named as an inertial navigation and support combination 6.
The parts in the step S1 are specifically as follows:
the bracket is in a hanging basket shape, and aims to lower the gravity center of the inertial navigation and bracket assembly 6 into a damping plane formed by the central points of the shapes of the four rubber dampers 3 so as to reduce dynamic coupling; the mounting plate is arranged in the length direction of the support, the rubber shock absorber mounting through holes are formed in the mounting plate, and the support and the rubber shock absorber are fixed with each other through the rubber shock absorber mounting through holes;
in a three-dimensional model of the rubber buffer base established in the three-dimensional design software, the axis of the rubber shock absorber mounting through hole is superposed with the vertical center line of the top surface of the supporting column;
the first spring applying transition plate and the second spring applying transition plate are rectangular plates, the first spring applying transition plate is provided with a first through hole, and the second spring applying transition plate is provided with a second through hole;
the placing direction of the first spring applying transition plate is as follows: the axial direction of the first through hole is coincided with the length direction of the rubber buffer base, and the axial line of the first through hole passes through the central point of the rubber shock absorber mounting through hole;
the placing direction of the second spring applying transition plate is as follows: the axial direction of the second through hole is coincided with the width direction of the rubber buffer base, and the axial line of the second through hole passes through the central point of the rubber shock absorber mounting through hole.
Preferably, the three-dimensional design software can be Solidworks, proE, UG and other three-dimensional design software.
Preferably, the three-dimensional software is saved as a common format of parasolid. X _ t after the build is complete.
To verify the correctness of the analytic dynamics modeling method of the rubber shock absorber-based damping device of the present invention, please refer to fig. 18, set up a test verification environment to carry out test verification, mount the rubber damping base mounted with the land inertial navigation system 1 on the impact table top 11 of the impact table 12, and respectively apply the acceleration impacts in the OY direction to the impact table 8, where the applied impacts are consistent with the impacts set in the ADAMS software, that is: the input impact condition is sine wave impact with the cycle of 8ms and the amplitude of 200 g; obtaining the buffer stroke and the OY-direction acceleration of the land inertial navigation system 1 relative to a bottom plate 5 of the rubber buffer base by utilizing the navigation function of the land inertial navigation system 1; finally, a data acquisition computer 16 is used for synchronously acquiring the buffer stroke and the OY direction acceleration of the land inertial navigation system 1 relative to the bottom plate 5 of the rubber buffer base; the final test verification results and the maximum value of the OY direction buffer stroke, the maximum value of the OZ direction buffer stroke, and the maximum value of the OY direction acceleration obtained by the method proposed by the present invention, and the relative errors of the test verification results and the results obtained by the method proposed by the present invention are shown in table 1. Referring to table one, the relative error values between the test verification results and the results obtained by the method of the present invention are as follows: the relative error of the maximum value of the buffer stroke in the OY direction is 6.58 percent, the relative error of the maximum value of the buffer stroke in the OZ direction is 0 percent, and the relative error of the maximum value of the acceleration in the OY direction is 6.38 percent. Therefore, the analytic dynamic modeling method for the buffer device based on the rubber shock absorber has good accuracy.
Table-test verification results and results obtained with the method proposed by the present invention and their relative errors
Figure BDA0003891478970000091
Example two
The difference between the present embodiment and the first embodiment is that the specific operation of setting the physical parameters of the inertial navigation and support combination in step S2 is further defined:
setting physical parameters of the assembly in ADAMS software including mass m and moment of inertia I O 。
Wherein the moment of inertia I O The method specifically comprises the following steps:
Figure BDA0003891478970000092
wherein, I xx 、I xy 、I xz 、I yx 、I yy 、I yz 、I zx 、I zy And I zz Respectively, moment of inertia I O A component in a first row and a first column, a first row and a second column, a first row and a third column, a second row and a first column, a second row and a second column, a second row and a third column, a third row and a first column, a third row and a second column, and a third row and a third column.
Specifically, in AThe physical parameters for setting the inertial navigation and support combination 6 in the DAMS software comprise mass weight m and rotational inertia I O The values of (A) are: m =20Kg of the total amount of the mixture,
Figure BDA0003891478970000101
referring to fig. 7, the specific operations in the ADAMS software are: right-clicking the part corresponding to the inertial navigation and support assembly 6 to select "Modify", selecting "Mass Properties" in a "Category" pull-down menu, selecting "User Input" in a "fine Mass By" pull-down menu, and filling in "Mass", "Ixx", "Iyy" and "Izz", respectively: 20.0, 1.3E +05, 1.9E +05, 2.0E +05, and finally clicking 'OK' to finish the setting.
EXAMPLE III
The difference between this embodiment and the second embodiment is that the specific operation of creating the constraint in step S2 is further defined:
the constraints created in step S2 include: the support column and the bottom plate are fixedly constrained, the bottom plate and the first spring exert a transition plate, and the bottom plate and the second spring exert a transition plate.
Specifically, clicking the Connectors to Joints in the menu bar, selecting the Create a Fixed Joint, and respectively applying the support column 4 and the bottom plate 5, the bottom plate 5 and the first spring to the transition plate 7, and the bottom plate 5 and the second spring to the transition plate 8 for Fixed constraint.
Example four
The present embodiment is different from the first embodiment in that the specific operations of creating the spring assembly and setting the spring parameters in step S3 are further defined:
and adding a plurality of springs, and dividing the added springs into four spring groups, namely, the four spring groups respectively correspond to the four supporting columns.
Each spring group comprises a first linear spring, a second linear spring, a third linear spring, a first torsion spring, a second torsion spring and a third torsion spring;
wherein the stiffness k of the first, second and third linear springs l Are identical to each otherDamping c l The same; stiffness k of first torsion spring, second torsion spring, third torsion spring r Uniformity, damping c r The same is true. k is a radical of formula l 、c l 、k r And c r The values of (A) are respectively as follows: k is a radical of l ＝300N/mm、c l ＝0.05N·s/mm、k r ＝2×10 7 N.mm/rad and c r ＝2.5×10 4 N·mm·s/rad。
Fixing one ends of the first linear spring, the second linear spring and the third linear spring at the center of a rubber shock absorber mounting through hole of the bracket; the other end of the first linear spring is positioned in the center of the first through hole, the other end of the second linear spring is positioned in the center of the second through hole, and the other end of the third linear spring is positioned in the center of the top surface of the supporting column;
specifically, the operations in the ADAMS software are: first, add linear springs and set linear spring parameters: firstly, clicking 'Forces' in a menu bar, selecting 'Create a relative Spring-pointer', and adding linear springs between a first Spring applying transition plate 7, a second Spring applying transition plate 8 and a support column 4 and a support 2 respectively according to the attached figure 8; and secondly, setting parameters of a linear spring: a right-click linear Spring selecting "Modify", referring to fig. 9, in a pop-up "Modify a Spring-pointer Force" dialog box, after "verify and marking" - "verify and coating" enter "(300 (newton/mm))", after "verify and marking" - "coating coordinate" enter "(0.05 (newton-sec/mm))", and clicking "OK" to complete the setting;
fixing one ends of the axes of the first torsion spring, the second torsion spring and the third torsion spring at the center of the mounting through hole of the rubber shock absorber; the other end of the first torsion spring is positioned in the center of the first through hole, the other end of the second torsion spring is positioned in the center of the second through hole, and the other end of the third torsion spring is positioned in the center of the top surface of the support column;
specifically, adding a torsion spring and setting torsion spring parameters: firstly, clicking 'Forces' in a menu bar, selecting 'Create a Rotational Spring-pointer', and adding torsion springs between a first Spring applying transition plate 7, a second Spring applying transition plate 8 and a support column 4 and a support 2 respectively according to the attached figure 8; and step two, setting the parameters of a torsion spring: a right-hand Torsion Spring selecting "Modify", referring to fig. 10, in the pop-up "Modify a torque Spring" dialog box, after "stifness and profiling" - "stifness coeffient" is inputted "(2E 7 (newton-mm/rad))", after "stifness and profiling" - "profiling coeffient" is inputted "(2.5E4 (newton-mm-sec/rad))", and "OK" is clicked to complete the setting; finally, a single rubber damper 3 is simulated by three linear springs and three torsion springs connected between the first spring apply transition plate 7, the second spring apply transition plate 8, the support column 4 and the bracket 2.
EXAMPLE five
The difference between this embodiment and the first embodiment is that the specific operations of creating the measurement parameters of the buffer stroke and the buffer efficiency in step S4 are further defined as:
the created measurement parameter of the buffer stroke is the relative displacement change of the gravity center of the land inertial navigation device relative to the gravity center of the bottom plate; the created measurement parameter of the buffering efficiency is the ratio of the maximum acceleration of the gravity center of the land inertial navigation device to the maximum acceleration on the bottom plate.
Specifically, the specific operations of adding a buffer stroke and measuring the buffer effect in the ADAMS software are as follows: first, add the measurement of the buffer stroke: firstly, clicking 'Design extension' in a menu bar, 'Create a new Point-to-Point measure' in 'Measures'; secondly, respectively clicking the gravity center of the land inertial navigation system 1 and the gravity center of the bottom plate 2; thirdly, referring to fig. 11, in the dialog box "Point-to-Point Measure", the "characterstic" selects "Translational displacement", the distance obtained by clicking the "Y" setting in "Component" is the buffer stroke obtained in OY, and the distance obtained by clicking the "Z" setting in "Component" subtracts the distance between the gravity center of the inertial navigation system 1 for land and the gravity center of the bottom plate 5 in the OZ direction in the static state (in this embodiment, the numerical value is 124.5 mm) to obtain the buffer stroke in OZ; then, a measure of the buffering effect is added: firstly, clicking 'Design extension' in a menu bar, 'Create a new Point-to-Point measure' in 'Measures'; secondly, respectively pointing and selecting the gravity center of the land inertial navigation system 1 and the gravity center of the bottom plate 2; thirdly, referring to fig. 12, in the Point-to-Point Measure dialog box, "probabilistic" selects "Translational access," and "Y" in "Component" is clicked to set the acceleration of the inertial navigation system for land 1 in the OY direction; fourthly, dividing the obtained maximum acceleration value of the land inertial navigation system 1 by the set maximum acceleration value on the bottom plate 5 to obtain a buffering effect;
EXAMPLE six
The present embodiment is different from the first embodiment in that the specific operation of setting the external impact condition in step S5 is further defined:
the step S501 is executed: applying linear displacement drive of the bottom plate relative to the ground on the bottom plate, and inputting an acceleration function of external impact in the linear displacement drive;
specifically, the operations for implementing this step in the ADAMS software are: first, linear displacement drive is added: firstly, selecting Connectors in a menu bar and creata relative Joints in Joints, respectively clicking a bottom plate 5 and a ground, wherein the direction is selected to be an OY direction, and creating a linear displacement connection between the bottom plate 5 and the ground; secondly, selecting 'relative Motion' in 'Motions' and 'Joint Motions' in a menu bar, and clicking the constructed linear displacement drive between the bottom plate 5 and the ground; thirdly, the straight line displacement drive constructed by the right key, as shown in fig. 13, selects "Acceration" by "Type" in the popped up "Joint Motion" dialog box, inputs the drive Function in "Function (time)", and clicks "OK" to complete the setting; in this embodiment, the input impulse condition is a half sine wave impulse with a period of 4ms and an amplitude of 200g, so the input drive Function in "Function (time)" is: "IF (time-0.002:
executing the step S502: and (5) performing simulation to obtain results of buffer stroke and buffer efficiency.
Specifically, in this embodiment, after the acceleration function of the external impact is input in the linear displacement drive, "Run an Interactive Simulation" in "Simulation" in the menu bar is clicked, referring to fig. 14, in the "Simulation Control" dialog box, the Simulation Time is filled in "End Time" as "0.8", the Simulation step number is filled in "Steps" as "800", and the "Start Simulation" button is clicked to Start the Simulation; finally, clicking the "sources ADAMS Postprocessor" in the "Results" - "Postprocessor" in the menu bar to enter a post-processing interface of ADAMS software after the simulation is finished, and referring to the attached drawings 15, 16 and 17, obtaining the components of the displacement of the gravity center of the land inertial navigation 1 relative to the gravity center of the bottom plate 5 in the OY and OZ directions and the OY direction acceleration of the land inertial navigation 1; wherein, the component of the displacement of the gravity center of the land inertial navigation system 1 relative to the gravity center of the bottom plate 5 in the OY direction is the buffer stroke of the rubber buffer base in the OY direction, and the component of the displacement of the gravity center of the land inertial navigation system 1 relative to the gravity center of the bottom plate 5 in the OZ direction minus the initial distance (124.5 mm in this embodiment) in the OZ direction is the buffer stroke of the rubber buffer base in the OZ direction; referring to fig. 15, the maximum value of the cushion stroke in the OY direction of the rubber cushion base is: 7.6mm; referring to fig. 16, the maximum value of the cushion stroke in the OZ direction of the rubber cushion base is: 0.5mm (calculated by subtracting the initial distance 124.5mm in the OZ direction); referring to FIG. 17, the maximum value of the OY acceleration of the land inertial navigation system 1 is-4.6199E5mm/s 2 (i.e., -47 g), and the maximum acceleration on the base plate 5 is 200g, and the buffering effect is 23.5% calculated from 47g/200 g.
In summary, according to the ADAMS-based dynamic analysis method for the rubber buffer base, the dynamic analysis of the rubber buffer base requiring complex dynamic derivation is simply and accurately performed by using ADAMS software, so that the modeling is simpler, the complex dynamic analysis derivation process is not required, the calculation is faster, and the practicability is further improved so as to facilitate the application in engineering.
It should be noted that, for the sake of simplicity, the above-mentioned method embodiments are described as a series of acts or combinations, but those skilled in the art should understand that the present invention is not limited by the described order of acts, as some steps may be performed in other orders or simultaneously according to the present invention. Further, those skilled in the art will appreciate that the embodiments described in the specification are presently preferred and that no acts or modules are necessarily required of the invention.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and parts that are not described in detail in a certain embodiment may refer to related descriptions of other embodiments.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent changes made by using the contents of the present specification and the drawings, or applied directly or indirectly to the related technical fields, are included in the scope of the present invention.

Claims (10)

1. An ADAMS-based dynamic analysis method for a rubber buffer base is characterized by comprising the following steps of:
s1, establishing a three-dimensional model of a rubber buffer base, and importing the three-dimensional model into ADAMS software; the three-dimensional model comprises a first combination body and a rubber shock absorber;
s2, setting a first physical parameter of the first assembly in ADAMS software, and creating a constraint;
s3, establishing a spring assembly in ADAMS software and setting spring parameters for simulating the rubber shock absorber;
s4, creating measurement parameters of a buffer stroke and buffer efficiency in ADAMS software;
and S5, setting an external impact condition in ADAMS software, and performing simulation to obtain the results of the buffer stroke and the buffer efficiency of the rubber buffer base.
2. An ADAMS-based method for analyzing dynamics of rubber buffer bases according to claim 1, wherein step S1 specifically comprises the following steps:
s101, establishing parts required by a three-dimensional model of the rubber buffer base in three-dimensional design software, wherein the parts comprise an inertial navigation device, a support column, a bottom plate and a rubber shock absorber;
the supporting columns are fixed on the bottom plate and are arranged in a rectangular shape; the support is arranged on the supporting column; the rubber shock absorber is positioned between the supporting column and the bracket; the gravity center of the inertial navigation device is superposed with the center of a rectangle formed by the arrangement positions of the rubber shock absorbers;
s102, the first combination body is formed by combining the inertial navigation device and the support;
s103, the part further comprises a first spring applying transition plate and a second spring applying transition plate, and the first assembly is combined with the support column, the bottom plate, the first spring applying transition plate and the second spring applying transition plate to form a first assembly.
3. An ADAMS-based method for analyzing dynamics of rubber cushioning pad according to claim 2, wherein said parts in step S1 are specifically:
the mounting plate is arranged in the length direction of the support, a rubber shock absorber mounting through hole is formed in the mounting plate, and the support and the rubber shock absorber are fixed with each other through the rubber shock absorber mounting through hole;
the axis of the rubber shock absorber mounting through hole is superposed with the vertical center line of the top surface of the supporting column;
the first spring applying transition plate and the second spring applying transition plate are both rectangular plates, the first spring applying transition plate is provided with a first through hole, and the second spring applying transition plate is provided with a second through hole;
the placing direction of the first spring applying transition plate is as follows: the axial direction of the first through hole is made to coincide with the length direction of the rubber buffer base, and the axial line of the first through hole passes through the central point of the rubber shock absorber mounting through hole;
the placing direction of the transition plate applied by the second spring is as follows: and the axis direction of the second through hole is coincided with the width direction of the rubber buffer base, and the axis of the second through hole passes through the central point of the rubber shock absorber mounting through hole.
4. An ADAMS-based method for dynamics analysis of rubber buffer bases according to claim 3, characterized in that the constraints created in step S2 include: the support column and the bottom plate are fixedly constrained, the bottom plate and the first spring exert a transition plate, and the bottom plate and the second spring exert a transition plate.
5. The ADAMS-based rubber buffer base kinetic analysis method according to claim 4, wherein the step S3 of creating a spring assembly in ADAMS software and setting spring parameters specifically comprises: dividing the added springs into a plurality of spring groups, wherein one spring group corresponds to one supporting column.
6. The ADAMS-based rubber buffer base kinetic analysis method according to claim 5, wherein the step S3 of creating a spring assembly in ADAMS software and setting spring parameters specifically comprises:
the spring set comprises a first linear spring, a second linear spring, a third linear spring, a first torsion spring, a second torsion spring and a third torsion spring;
one ends of the first linear spring, the second linear spring and the third linear spring are all fixed at the center of the rubber shock absorber mounting through hole of the bracket; the other end of the first linear spring is positioned in the center of the first through hole, the other end of the second linear spring is positioned in the center of the second through hole, and the other end of the third linear spring is positioned in the center of the top surface of the supporting column;
one ends of the axes of the first torsion spring, the second torsion spring and the third torsion spring are all fixed at the center of the rubber shock absorber mounting through hole; the other end of the first torsion spring is positioned in the center of the first through hole, the other end of the second torsion spring is positioned in the center of the second through hole, and the other end of the third torsion spring is positioned in the center of the top surface of the supporting column;
wherein the first, second and third linear springs have a stiffness k l Uniformity, damping c l The same; stiffness k of the first torsion spring, the second torsion spring and the third torsion spring r Identity, damping c r The same is true.
7. An ADAMS-based method for analyzing dynamics of rubber buffer bases according to claim 1, wherein step S2 is specifically as follows: setting physical parameters of the first combination in ADAMS software including mass m and moment of inertia I O 。
8. An ADAMS-based method for analyzing dynamics of rubber buffer bases according to claim 7, wherein the moment of inertia I is O The method comprises the following specific steps:
Figure FDA0003891478960000031
wherein, I xx 、I xy 、I xz 、I yx 、I yy 、I yz 、I zx 、I zy And I zz Respectively, moment of inertia I O A component in a first row, a second column, a first row, a third column, a second row, a first column, a second row, a second column, a second row, a third column, a third row, a first column, a third row, a second column, and a third row, a third column.
9. An ADAMS-based method for analyzing dynamics of rubber buffer bases according to claim 1, wherein step S4 is specifically: the created measurement parameter of the buffer stroke is the relative displacement change of the gravity center of the inertial navigation device relative to the gravity center of the bottom plate; the created measurement parameter of the buffering efficiency is the ratio of the maximum acceleration of the inertial navigation device to the maximum acceleration on the bottom plate.
10. The method for dynamic analysis of ADAMS-based rubber buffer bases according to claim 1, characterized in that step S5 is specifically:
s501, applying linear displacement drive of the bottom plate relative to the ground on the bottom plate, and inputting an acceleration function of external impact in the linear displacement drive;
and S502, simulating to obtain the results of the buffering stroke and the buffering efficiency of the rubber buffering base.
CN202211262107.4A 2022-10-14 2022-10-14 ADAMS-based dynamic analysis method for rubber buffer base Pending CN115544776A (en)

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