Contact analysis method of numerical load tooth surface based on hyperboloid shell element model
A contact analysis, shell element technology, applied in CAD numerical modeling, electrical digital data processing, special data processing applications, etc., can solve the problem of poor modifiability, flexibility and practicability, and high precision requirements for gear finite element element models question
Active Publication Date: 2019-01-04
CENT SOUTH UNIV
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[0002] Loaded tooth surface contact analysis (LTCA) is a major design method of tooth surface transmission performance in the field of spiral bevel gear manufacturing. At present, the main method is to rely on the finite element simulation software platform to solve the problem. The simulation load tooth surface contact analysis method is complicated. , the precision of the gear finite element element model is high, the entire solution process is computationally intensive and time-consuming, and once the calculation results are wrong, the modifiability is poor, and the flexibility and practicability of the design are greatly reduced
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[0134] The above technical scheme will be described in detail below with reference to the drawings and calculation examples.
[0135] Regarding i) Tooth surface bending characteristic analysis, the details are as follows:
[0136] The tooth profile of spiral bevel gears is very complex and has its own characteristics of tooth surface bending behavior. In order to establish an accurate finite element model, it is first necessary to analyze its basic structural characteristics from the geometric level. figure 1 The basic schematic diagram of the tooth surface shape of the spiral bevel gear is given, from the tooth height h G , Tooth thickness t G And tooth width direction w G Define the three-dimensional dimensions of the tooth surface. Especially for the shrinking teeth of face-milling, the tooth height gradually increases from the small end to the large end, the tooth root thickness gradually increases from the small end to the large end, and the tooth thickness gradually decrease...
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The invention discloses a numerical load tooth surface contact analysis (NLTCA) method based on a hyperboloid shell element model, the method comprising steps: the basic structural characteristics ofthe tooth surface of a spiral bevel gear is analyzed from a geometrical level and tooth surface bending behavior analysis is performed; combined with the basic theory and method of finite element modeling of helical bevel gears, a modeling method of hyperboloid shell element of helical bevel gears is proposed, which considers both meshing stiffness and contact flexibility of gears, in order to ensure that the numerical results of NLTCA are more authentic and effective; a Rayleigh-Ritz method is used to determine the meshing stiffness and contact flexibility of spiral bevel gears, which provides a basis for the solution of NLTCA numerical results and the analysis of contact mechanics performance; the objective function of NLTCA is solved by the combination of finite element method and linear programming method, and the direct correlation between machining parameters and evaluation items of tooth surface physical properties is established, and the direct parameter driving relationship between actual machining parameters and evaluation of tooth surface contact properties is provided. The calculation amount of the solution process is reduced and the flexibility and practicability of the design can be ensured.
Description
Technical field [0001] The invention belongs to the field of spiral bevel gear processing, and specifically is a numerical load tooth surface contact analysis method based on a hyperboloid shell element model. Background technique [0002] Loaded tooth surface contact analysis (LTCA) is one of the main tooth surface transmission performance design methods in the field of spiral bevel gear manufacturing. At present, the main method is still relying on the finite element simulation software platform to solve the problem. The simulation load tooth surface contact analysis method is complicated. , The gear finite element element model requires high precision, the whole solution process is computationally intensive and time-consuming, and once the calculation results are wrong, the modifiable ability is poor, and the flexibility and practicality of the design are greatly reduced. Summary of the invention [0003] The purpose of the present invention is to provide a direct function that...
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Login to View More IPC IPC(8): G06F17/50
CPCG06F2111/10G06F30/23
Inventor 唐进元丁撼
Owner CENT SOUTH UNIV