Non-linear modal calculation method of tire structure

A calculation method and nonlinear technology, applied in complex mathematical operations, design optimization/simulation, geometric CAD, etc., can solve problems such as increasing the difficulty of tire modal analysis calculations, and achieve the effect of a simple method

Pending Publication Date: 2022-08-02
JILIN UNIV
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Problems solved by technology

At present, the existing theories of modal analysis are basically linear modal analysis, but they have certain limitations for solving nonlinear problems with large deformation, especially for solving complex structures such as tires, because the main component of tires is the cord For rubber composite materials, material nonlinearity and geometric nonlinearity need to be considered during analysis, which further increases the difficulty of tire modal analysis calculations

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  • Non-linear modal calculation method of tire structure
  • Non-linear modal calculation method of tire structure
  • Non-linear modal calculation method of tire structure

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Embodiment

[0063] see figure 2 One of the model aircraft tires shown. image 3The distribution of individual components of tread, sidewall, carcass cords, heels, beaders, apex, base, belt cords, and reinforcement cords is given, where beaders and cords It is a linear elastic material, and its material parameters are shown in Table 1. Other components are isotropic superelastic rubber material. The Mooney-Rivlin constitutive model is used for the rubber material, and its material parameters are shown in Table 2. Among them, A 10 and A 01 is the material constant and K is the bulk modulus. In the tire finite element simulation, not only the material properties of the cords need to be determined, but also parameters such as the diameter of a single cord, the distance between adjacent cords, and the laying angle of the cords, which are listed in Table 3. List in detail. In the inflation analysis, the tire pressure is 0.96MPa, and the model has a total of 228,000 units, 268,000 nodes, ...

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Abstract

The invention relates to a nonlinear modal calculation method of a tire structure, and belongs to the field of tire structure design. Comprising the following steps: 1, establishing a tire finite element model, and performing inflation analysis on a tire; 2, performing finite element analysis on the basis of tire inflation to obtain a tangent stiffness matrix of the last step of inflation, and assembling a total mass matrix to form a characteristic value equation; 3, solving a generalized eigenvalue and an eigenvector of the equation, and drawing a vibration mode cloud picture of the tire; and 4, performing tire dynamic performance evaluation according to a result solved in the step 3. An effective calculation method is provided for nonlinear modal analysis of the tire structure, compared with an existing linear modal analysis method, the method provides a nonlinear modal analysis theory, and can be used for solving modal problems such as geometric nonlinearity and material nonlinearity.

Description

technical field [0001] The invention relates to the field of tire structure design, in particular to a nonlinear modal calculation method of tire structure. The analysis theory for nonlinear modal analysis is given, which can be used to solve complex tire problems. Background technique [0002] When the tire rotates at a high speed, the uneven road surface, the unevenness of the tire, etc. will cause the vibration of the tire. When the vibration frequency reaches the natural frequency, it will cause resonance or even form a standing wave, causing damage to the tire. Therefore, modal analysis is used to study the influence of structural factors and vibration behavior of tires, which is convenient to design tires with good NVH performance. At present, the existing theories of modal analysis are basically linear modal analysis, but it has certain limitations for solving nonlinear problems with large deformation, especially for solving complex structures such as tires, because...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/23G06F30/15G06F17/11G06F119/14
CPCG06F30/23G06F30/15G06F17/11G06F2119/14Y02T90/00
Inventor 左文杰孙鹏飞周立宣王斌张然
Owner JILIN UNIV
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