A finite element analysis method for gear meshing characteristics considering the influence of matrix cracks
A finite element and crack technology, applied in special data processing applications, instruments, geometric CAD, etc., can solve the problems of inaccurate calculation, error, neglecting the influence of the gear strain of the matrix crack, and achieve accurate calculation results and reduce errors. Effect
Active Publication Date: 2020-04-14
NORTHEASTERN UNIV LIAONING
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However, there are the following deficiencies: (1), the analytical method is mainly aimed at the study of tooth root cracks, due to the complexity of non-penetrating matrix cracks, the analytical method cannot effectively calculate the damage of the matrix crack to the gear matrix; (2), the same , the finite element method mainly focuses on the research on tooth root cracks, and pays little attention to non-penetrating matrix cracks, and does not consider the influence of the interaction between crack surfaces, which will cause errors and is not realistic; (3), the existing In the technology, only the strain of the healthy gear is studied, and the influence of the matrix crack on the gear strain is ignored, and the calculation is inaccurate
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Embodiment 1
[0052] A finite element analysis method for gear meshing characteristics considering the influence of matrix cracks, such as figure 1 shown, including the following steps:
[0053] Step 1: Obtain the basic parameters of the gear pair of the driving wheel and the driven wheel and the crack parameters of the gear containing the matrix crack; in this embodiment, the basic parameters of the gear pair and the crack parameters of the gear containing the matrix crack are shown in Table 1:
[0054] Table 1 The basic parameters of the gear pair and the crack parameters of the gear with matrix cracks
[0055]
[0056] In this example, the crack initiation position angle ψ and the crack width L c remains constant, the crack depth q 0 Change from 5mm to 25mm, crack width L c Change between 5mm and 25mm;
[0057] Step 2: Establish a gear finite element model with matrix cracks, and the crack form is a parabolic non-penetrating matrix crack;
[0058] Step 2.1: Use the APDL function ...
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The invention relates to a finite element analysis method of gear meshing characteristics considering the influence of matrix cracks, comprising the following steps: obtaining the basic parameters of the gear pair of the driving wheel and the driven wheel and the crack parameters of the gear containing the matrix crack; establishing a healthy gear according to the basic parameters of the gear pair Three-dimensional finite element model, cutting the gear matrix to generate a gear finite element model with matrix cracks; performing mesh refinement on the crack surface, and establishing a surface-surface contact element Conta174 on the crack surface according to the interaction between the crack surfaces and Targe170; according to the crack parameters, calculate the gear meshing characteristics, and calculate the difference between the calculation result and whether the contact is established on the crack surface. This method makes the calculation results of cracked gear meshing stiffness and dedendum strain more accurate, and helps to understand the meshing characteristics of cracked gears with non-penetrating matrix and the interaction between cracked surfaces. The research results can provide certain references for gear design.
Description
technical field [0001] The invention belongs to the technical field of mechanical dynamics, and in particular relates to a finite element analysis method for gear meshing characteristics considering base cracks. Background technique [0002] Gear is an important mechanical transmission part, but due to manufacturing errors, poor lubrication, overload, stress concentration and other reasons, cracks will appear on the gear. Cracks will propagate not only along the teeth, but also along the gear matrix. In the prior art, a large number of studies on the meshing characteristics of cracked gears have been carried out by using analytical methods and finite element methods. However, there are the following deficiencies: (1), the analytical method is mainly aimed at the study of tooth root cracks, due to the complexity of non-penetrating matrix cracks, the analytical method cannot effectively calculate the damage of the matrix crack to the gear matrix; (2), the same , the finite e...
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IPC IPC(8): G06F30/23G06F30/17G06F119/14
CPCG06F30/17G06F30/23G06F2119/06
Inventor 马辉段田堂李占伟闻邦椿张学良
Owner NORTHEASTERN UNIV LIAONING