CN112069706B - Tribology and dynamics coupling analysis method for tank turret race - Google Patents
Tribology and dynamics coupling analysis method for tank turret race Download PDFInfo
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- CN112069706B CN112069706B CN202010857127.0A CN202010857127A CN112069706B CN 112069706 B CN112069706 B CN 112069706B CN 202010857127 A CN202010857127 A CN 202010857127A CN 112069706 B CN112069706 B CN 112069706B
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- G06F30/23—Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
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- G06T17/00—Three dimensional [3D] modelling, e.g. data description of 3D objects
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Abstract
The invention relates to a tribology and dynamics coupling analysis method for a tank turret race, which comprises the following steps: step one: constructing a tank turret race gap-containing contact finite element analysis model; step two: constructing a simulation model of a virtual prototype of the tank weapon system; step three: and constructing a tank turret race lubrication performance analysis model. The method provided by the invention can provide important references for accurate acquisition of dynamic behaviors and lubrication performance of the tank turret race, reasonable judgment of lubrication state and effective prediction of lubrication failure.
Description
Technical Field
The invention belongs to the technical field of tank weapon systems, and particularly relates to a dynamic and tribological coupling analysis method for a tank turret race.
Background
The turret race is a key component affecting the firing capability and accuracy of the tank and plays an important role in the transfer of load during turret rotation and firing. Previous studies have generally focused on the dynamics of turret races, with relatively little research on their lubricating properties. Under the severe working conditions of heavy load, impact load, high temperature and the like, the turret seat ring always has great challenges on the dynamic behavior and the lubricating performance of the turret seat ring, and the quality of the performance directly influences the service performance and the reliability of the turret seat ring and even the whole tank weapon system. There is a need to develop a method of coupling tribology and dynamics to analyze turret race performance.
Disclosure of Invention
The invention aims to provide a tribology and dynamics coupling analysis method for a tank turret race, which solves the problem that the coupling action mechanism of the dynamic behavior and tribology characteristics of the tank turret race in the prior art is not clear.
In order to achieve the above object, the present invention provides the following solutions:
a tribology and dynamics coupling analysis method for a tank turret race comprises the following steps:
step one: constructing a tank turret race gap-containing contact finite element analysis model;
step two: constructing a simulation model of a virtual prototype of the tank weapon system;
step three: and constructing a tank turret race lubrication performance analysis model.
The contact load, the oil film pressure and the oil film thickness distribution of the tank turret seat ring at different azimuth angles obtained in the steps one to three can provide references for reasonable judgment of the stress condition of the turret seat ring ball and the lubrication condition of the contact micro-area.
Further, a tank turret race geometric model containing initial gaps is imported into a finite element analysis module, on the basis of defining the unit properties and unit material constants of a contact body, a proper numerical value is selected from (0.01-10) to serve as a scale factor, namely a predicted default contact stiffness coefficient is obtained, grids are divided, contact pairs are defined, boundary conditions are defined, loads are applied, an expanded Lagrange algorithm is applied, correction is carried out in iteration, and finally the tank turret race contact characteristic parameters are solved.
Further, in the second step, a three-dimensional modeling module is adopted to build a tank weapon system model, and constraint pairs are applied to all parts according to the movement and connection relation of all parts of a certain tank weapon system in the transmitting process;
importing the established tank weapon system entity model into a dynamics simulation module, endowing each component of the tank weapon system with material properties, and completing assembly connection of each subsystem and the tank weapon system dynamics model by utilizing kinematic pairs, force elements, contact collision and other dynamics constraint equations according to the topological relation of each component, thereby establishing a tank weapon system virtual prototype model;
applying a transmitting load to a virtual prototype model of the tank weapon system to obtain ball contact load distribution of tank turret raceways at different azimuth angles;
the point contact spring flow problem in the tank ball race is approximately analyzed by adopting a line contact spring flow analysis method.
Further, in the third step, the calculation equation of the lubrication performance of the adopted tank turret race is as follows:
wherein h is the film thickness; u is the average speed; x is the direction of grease flow; n is the rheological index.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a tribology and dynamics coupling analysis method for a tank turret race, which can provide important references for accurate acquisition of dynamic behaviors and lubrication performance of the turret race, reasonable judgment of lubrication state and effective prediction of lubrication failure.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a tribology and dynamics coupling analysis method of a tank turret race of the present invention;
FIG. 2 is a schematic diagram of the topology of the tank weapon system of the present invention;
FIG. 3 is a schematic view of a tank turret race contact load distribution of the present invention;
fig. 4 is a schematic diagram of oil film pressure and film thickness distribution of a tank turret race of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, other embodiments that may be obtained by those of ordinary skill in the art without undue burden are within the scope of the present invention.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
As shown in fig. 1-4: the embodiment provides a tribology and dynamics coupling analysis method for a tank turret race, which comprises the following steps:
step one: constructing a tank turret race gap-containing contact finite element analysis model;
step two: constructing a simulation model of a virtual prototype of the tank weapon system;
step three: and constructing a tank turret race lubrication performance analysis model.
According to the tank turret seat ring contact load, oil film pressure and oil film thickness distribution at different azimuth angles, which are calculated by the method, reference can be provided for reasonable judgment of the stress condition of the ball of the turret seat ring and the lubrication condition of the contact micro-area.
In the first step of this embodiment, a geometric model of a tank turret race with an initial gap is introduced into a finite element analysis module, a friendship contact is applied between an upper race and balls, a contact pair is defined between a ball surface and an inner surface of the upper race, wherein the ball surface is a contact surface, the inner surface of the upper race is a target surface, and a reasonable contact stiffness coefficient scale factor is set. The lower race is fixed, and the balls are in initial gapless contact with the lower race. And applying an initial vertical speed on the top surface of the upper seat ring, and solving the ball clearance of the tank turret seat ring by using an expanded Lagrangian algorithm.
In the dynamics simulation module, the contact collision force adopts the Du-bosky spring-damping contact hinge theory, and the normal contact force F N The method comprises the following steps:
wherein K is a collision bodyIs a contact stiffness of (2); n is the force index; delta, delta,The relative displacement and the relative speed of the two objects when contacting are respectively; c is damping during a collision.
The expression of C is:
delta in max Is the maximum penetration; c (C) max Is the maximum value of damping coefficient.
When delta max When=0.01 mm, c=c max The method comprises the following steps:
grease is present at each contact location in the turret seat ring, so the effects of contact deformation stiffness and oil film stiffness must be considered simultaneously. The contact stiffness in the dynamic simulation module is obtained by connecting the contact deformation stiffness and the oil film stiffness in series. Under the isothermal and sufficient lubricating grease condition, the dimensionless minimum oil film thickness between the rolling bodies and the upper seat ring is as follows:
H min ＝3.63U 0.68 G 0.49 W 1 -0.073 (1-e -0.68k ) (4)
wherein U is a dimensionless speed parameter; g is a dimensionless material parameter; w (W) 1 Is a load parameter; k is ellipticity.
The minimum oil film thickness between the rolling bodies and the upper race is:
h min ＝RxH min ＝3.63U 0.68 G 0.49 W 1 -0.073 (1-e -0.68k )R x (5)
wherein R is x Is the equivalent radius of curvature of the rolling elements in the x-direction.
The oil film stiffness is obtained according to the definition of stiffness:
K E ＝6.4066×10 8 h min -14.6986 U 9.361507 G 6.7123 E'R x 15.6986 (1-e -0.68k ) 13.6986 (6)
wherein E' is the equivalent elastic modulus.
The contact stiffness of the turret seat ring is as follows:
the minimum value of the finite element solving result of the ball clearance of the turret seat ring is brought into the formula (1), and the contact deformation rigidity (K) of the turret seat ring can be obtained i ). The oil film rigidity (K) of the turret race can be obtained according to the formulas (4) - (6) E ) And (3) bringing the turret seat ring contact deformation rigidity and the oil film rigidity obtained through the calculation into a formula (7) to obtain the turret seat ring contact rigidity (K).
In the second step of the embodiment, a three-dimensional modeling module is adopted to build a tank weapon system model, and constraint pairs are applied to all parts according to the movement and connection relation of all parts of a certain tank weapon system in the transmitting process. A fixing pair is applied to the barrel and tail according to fig. 2 as a recoil part in the overall simulation process. The barrel moves back and forth along the direction of the cradle so as to apply a sliding pair, and meanwhile, the gun tail collides with the cradle so as to add contact constraint. The ball and the lower race are fixed together, contact constraint is added between the ball and the upper race, the turret, the lower race and the ground are respectively provided with a fixed pair.
And importing the established tank weapon system entity model into a dynamics simulation module, endowing each part of the tank weapon system with material properties, and completing assembly connection of each subsystem and the tank weapon system dynamics model by utilizing kinematic pairs, force elements, contact collision and other dynamics constraint equations according to the topological relation of each part, thereby establishing a tank weapon system virtual prototype model.
The firing load is fitted into a spline by using a spline function provided in a dynamics simulation module through firing load data of the tank, and acts on a tank weapon system in a force mode, and fig. 3 is a schematic diagram of ball contact load distribution at different azimuth angles of a tank turret race.
In the third step of the embodiment, the point contact spring flow problem in the tank ball race is approximately analyzed by adopting a line contact spring flow analysis method. Generally, the tank ball race elastography corresponds to the point contact problem, but the point contact is actually elliptical contact under heavy load conditions. Since the concave raceway of the ball bearing and the spherical balls are high in the degree of coincidence, the ellipticity of the ball bearing is large. And the ellipticity of the bearing of a specific structure is constant. Whereas the line contact elastography method is equally effective for oblong contacts between ellipticities 8-10, typically as point contacts in ball bearings. Therefore, when the ellipticity of the turret race is 8-10, it is reasonable to approximately analyze the point contact problem in the tank ball race by adopting a line contact bullet flow analysis method.
In step three of the present embodiment, the lubricating performance calculation equation adopted is:
wherein h is the film thickness; u is the average speed; x is the direction of grease flow; n is the rheological index.
Fig. 4 is a schematic diagram of oil film pressure and film thickness distribution of a turret seat ring with maximum stress in a micro-area of ball contact.
The principles and embodiments of the present invention have been described in this specification with reference to specific examples, which are provided for the understanding of the method and core idea of the present invention. Modifications and equivalent substitutions can be made by those skilled in the art based on the present teachings without departing from the spirit and scope of the present teachings, which shall be covered by the scope of the appended claims.
Claims (1)
1. The tribology and dynamics coupling analysis method for the tank turret race is characterized by comprising the following steps of:
step one: constructing a tank turret race gap-containing contact finite element analysis model;
step two: constructing a simulation model of a virtual prototype of the tank weapon system;
step three: constructing a tank turret race lubrication performance analysis model;
the distribution of the contact load, the oil film pressure and the oil film thickness of the tank turret seat ring at different azimuth angles obtained in the steps one to three can provide references for reasonable judgment of the stress condition of the turret seat ring ball and the lubrication condition of the contact micro-area;
firstly, importing a tank turret race geometric model containing an initial gap into a finite element analysis module, selecting proper values from (0.01-10) as scale factors on the basis of defining the unit properties and unit material constants of a contact body, namely, a predicted default contact stiffness coefficient, dividing grids, defining contact pairs, defining boundary conditions, applying a load, then applying an expanded Lagrange algorithm, correcting in iteration, and finally solving the contact characteristic parameters of the tank turret race;
establishing a tank weapon system model by adopting a three-dimensional modeling module, and applying constraint pairs to each component according to the motion and connection relation of each component of a certain type of tank weapon system in the transmitting process;
importing the established tank weapon system entity model into a dynamics simulation module, endowing each component of the tank weapon system with material properties, completing assembly connection of each subsystem and the tank weapon system dynamics model by utilizing kinematic pairs, force elements, contact collision and other dynamics constraint equations according to the topological relation of each component, and establishing a tank weapon system virtual prototype model;
applying a transmitting load to a tank weapon system virtual prototype model to obtain ball contact load distribution at different azimuth angles of a tank turret seat ring;
approximately analyzing the point contact spring flow problem in the tank ball race by adopting a line contact spring flow analysis method;
in the third step, the adopted tank turret race lubricating performance calculation equation is as follows:
wherein h is the film thickness; u is the average speed; x is the direction of grease flow; n is the rheological index.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005211380A (en) * | 2004-01-30 | 2005-08-11 | Tamiya Inc | Model tank |
| CN103573829A (en) * | 2012-08-06 | 2014-02-12 | 通用汽车环球科技运作有限责任公司 | Bearing with sealing slinger |
| CN110399700A (en) * | 2019-08-07 | 2019-11-01 | 南京理工大学 | Gun turret based on Modelica-cannon inter-axis coupling Nonlinear Modeling and system simulation method |
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- 2020-08-24 CN CN202010857127.0A patent/CN112069706B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005211380A (en) * | 2004-01-30 | 2005-08-11 | Tamiya Inc | Model tank |
| CN103573829A (en) * | 2012-08-06 | 2014-02-12 | 通用汽车环球科技运作有限责任公司 | Bearing with sealing slinger |
| CN110399700A (en) * | 2019-08-07 | 2019-11-01 | 南京理工大学 | Gun turret based on Modelica-cannon inter-axis coupling Nonlinear Modeling and system simulation method |
Non-Patent Citations (1)
| Title |
|---|
| 基于刚柔耦合的坦克炮发射动力学仿真分析;徐达;胡俊彪;穆歌;;装甲兵工程学院学报(04);全文 * |
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