CN-121997676-A - Opening and closing device deflection and sealing collaborative optimization system based on magnetorheological material

CN121997676ACN 121997676 ACN121997676 ACN 121997676ACN-121997676-A

Abstract

The invention discloses a magneto-rheological material-based opening and closing device deflection and sealing collaborative optimization system which comprises a mechanical model construction module, an opening and closing device boundary condition setting module, a cross-section stress function construction module, a magneto-rheological material modeling module, a shear stress constitutive model construction, a constitutive stiffness conversion function construction, a collaborative optimization module, an optimization objective function construction, a constraint condition construction, an optimality condition function construction, an optimal magnetic field control strategy acquisition based on a solution of the optimality condition function, a mechanical property analysis module, an opening and closing device finite element discrete equation construction, an acceleration solving function constraint condition construction, a sealing and damping collaborative module, a sealing leakage amount calculation function construction, a damping force calculation function construction and a comprehensive performance index calculation function. According to the system, through the mechanical property analysis module, the actual running scene of the mechanical property analysis laminating device is ensured, and the engineering applicability of an analysis result is improved.

Inventors

ZHANG XUYANG
SUN HU
WANG ZHAOYUE
Huang Xibu

Assignees

江苏大学

Dates

Publication Date: 20260508
Application Date: 20260317

Claims (8)

1. An opening and closing device deflection and sealing collaborative optimization system based on magneto-rheological materials, characterized in that the system comprises: The first module is a mechanical model construction module for constructing a mechanical model of the opening and closing device and calculating deflection at different positions; The second module is a magneto-rheological material modeling module, which is used for constructing a shear stress constitutive model and calculating the shear stress, constructing a constitutive stiffness conversion function and calculating the equivalent shear modulus under the combined action of a magnetic field and temperature; the third module is a collaborative optimization module, which is used for constructing an optimization objective function, constructing constraint conditions, constructing an optimality condition function, and obtaining an optimal magnetic field control strategy based on a solution of the optimality condition function; the fourth module is a mechanical property analysis module for constructing a finite element discrete equation of the opening and closing device, constructing a limiting condition of an acceleration solving function, and respectively calculating a system stiffness matrix, a damping matrix and a load vector; And fifthly, constructing a sealing leakage amount calculation function, constructing a damping force calculation function, constructing a comprehensive performance index calculation function and calculating a comprehensive performance index by the sealing and damping cooperation module.
2. The system of claim 1, wherein the mechanical model in the first module is as follows: Wherein, the For the rate of change of curvature of the effective stiffness distribution, In order to have an effective stiffness distribution, Is the modulus of elasticity of the material, Is the section moment of inertia; Is the position The deflection of the position is calculated, Is the coordinate location along the length of the structure; Is a traditional distributed load function; Distribution of gravitational load; is an additional load for the magnetorheological material.
3. The system of claim 1, wherein the shear stress constitutive model in the second module is as follows: Wherein, the Is shear stress; Yield stress after the magnetic field is enhanced; The viscosity is the magnetic field dependence after the magnetic field is enhanced; is the shear rate; is the magnetic field strength.
4. The system of claim 1, wherein the intrinsic stiffness transfer function in the second module is as follows: Wherein, the For equivalent shear modulus under the combined action of magnetic field and temperature, In order for the magnetic field to be of a strength, Is the temperature; is the initial shear modulus; for enhancement coefficients; is the attenuation coefficient; Is the reference temperature.
5. The system of claim 1, wherein the optimization objective function in the third module is as follows: Wherein, the To optimize the objective function; is the maximum deflection; is the maximum stress; sealing efficiency; And Is a weight coefficient; the Lagrangian function is as follows: Wherein, the As a lagrangian function; maximum deflection allowed for the structure; is the yield strength of the material; And Is a weight coefficient; And Is a lagrange multiplier.
6. The system of claim 1, wherein the optimality condition function in the third module is as follows: Wherein, the As a lagrangian function; is the maximum deflection; is the maximum stress; sealing efficiency; And Is a weight coefficient; And Is a Lagrangian multiplier; is the magnetic field strength; The optimal magnetic field control strategy is as follows: Wherein, the Is an optimal magnetic field control strategy; The solution being an optimality conditional function comprising an optimal maximum deflection Optimum maximum stress Optimum sealing efficiency 。
7. The system of claim 1, wherein the finite element discrete equation in the fourth module is as follows: Wherein, the Is a system quality matrix; Is a damping matrix; Is a system stiffness matrix; is a load vector; is a node acceleration vector; is a node velocity vector; is a node displacement vector.
8. The system of claim 1, wherein the seal leakage amount calculation function in the module five is as follows: Wherein, the Is the amount of seal leakage; is the characteristic radius of the seal gap; is the pressure difference between the two sides of the seal; In order for the magnetic field to be dependent on viscosity, Is an optimal magnetic field control strategy; Is the axial length of the seal segment; the comprehensive performance index calculation function is as follows: Wherein, the Is a comprehensive performance index; the average damping force after time integration; 、 And Is a weight coefficient.

Description

Opening and closing device deflection and sealing collaborative optimization system based on magnetorheological material Technical Field The invention relates to the field of magnetorheological opening and closing devices, in particular to an opening and closing device deflection and sealing collaborative optimization system based on a magnetorheological material. Background The intelligent optimization system mainly comprises a mechanical model construction module, a magnetorheological material modeling module, a cooperative optimization module, a mechanical property analysis module and a sealing and damping cooperative module, wherein when the intelligent optimization system is used, key parameters such as deflection, stress and shear modulus are calculated, a multi-objective optimization function is built through the cooperative optimization module, an optimal magnetic field control strategy is deduced through combination of constraint conditions, dynamic operation stability is verified through the mechanical property analysis module, sealing leakage standard and damping matching are guaranteed through the sealing and damping cooperative module, and the optimization system is widely applied to scenes such as industrial valves, hydraulic transmission systems, aerospace opening and closing mechanisms, hydraulic engineering gate control and precision mechanical executing mechanisms. In practical application, the dynamic characteristics, the matching magnetic field and the rigidity are difficult to evaluate, so that dynamic response in the operation of the device is ignored, the structural durability of the device is insufficient, and on the other hand, the situation that the optimized result is distorted due to the fact that the optimized result is distorted is easy to appear, and leakage of the device is caused. Disclosure of Invention Aiming at the defects of the prior art, the invention aims to provide a deflection and sealing collaborative optimization system of an opening and closing device based on a magnetorheological material, so as to solve the problems that the dynamic characteristics, the matching magnetic field and the rigidity are difficult to evaluate and the optimization result is easy to appear, and ensure that the device can stably, efficiently and safely operate under complex and changeable actual working conditions. In order to achieve the above purpose, the invention adopts the following technical scheme: The invention relates to a magneto-rheological material-based deflection and sealing collaborative optimization system of an opening and closing device, which comprises the following components: The first module is a mechanical model construction module for constructing a mechanical model of the opening and closing device and calculating deflection at different positions; The second module is a magneto-rheological material modeling module, which is used for constructing a shear stress constitutive model and calculating the shear stress, constructing a constitutive stiffness conversion function and calculating the equivalent shear modulus under the combined action of a magnetic field and temperature; the third module is a collaborative optimization module, which is used for constructing an optimization objective function, constructing constraint conditions, constructing an optimality condition function, and obtaining an optimal magnetic field control strategy based on a solution of the optimality condition function; the fourth module is a mechanical property analysis module for constructing a finite element discrete equation of the opening and closing device, constructing a limiting condition of an acceleration solving function, and respectively calculating a system stiffness matrix, a damping matrix and a load vector; And fifthly, constructing a sealing leakage amount calculation function, constructing a damping force calculation function, constructing a comprehensive performance index calculation function and calculating a comprehensive performance index by the sealing and damping cooperation module. Further, the mechanical model in the first module is as follows: Wherein, the For the rate of change of curvature of the effective stiffness distribution,In order to have an effective stiffness distribution,Is the modulus of elasticity of the material,Is the section moment of inertia; Is the position The deflection of the position is calculated,Is the coordinate location along the length of the structure; Is a traditional distributed load function; Distribution of gravitational load; is an additional load for the magnetorheological material. Further, the shear stress constitutive model in the second module is as follows: Wherein, the Is shear stress; Yield stress after the magnetic field is enhanced; The viscosity is the magnetic field dependence after the magnetic field is enhanced; is the shear rate; is the magnetic field strength. Further, the constitutive stiffness transfer func