Method for using functionally graded materials to reduce weight of gear
A technology of functionally graded materials and gears, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as increasing the complexity of optimization problems, and achieve the effect of reducing material costs and weight
Inactive Publication Date: 2015-03-04
BEIJING INSTITUTE OF TECHNOLOGYGY
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However, due to the unique complex form and geometric characteristics of gears, there will be a large number of design parameters in the design of gears, and the influence of changes in gear parameters on the gear train, transmission system and the entire equipment must be taken into account, which increases the complexity of the optimization problem. Spend
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[0080] The automobile industry is a big fuel consumer. Reducing the weight of a car can reduce fuel consumption and exhaust emissions, thereby reducing environmental pollution. Therefore, how to reduce the weight of automobiles is getting more and more attention from the automobile industry and environmental protection departments in the world. One of the effective ways to reduce the overall weight of a car is to reduce the weight of the car's transmission gears. The present invention takes the gear of the automobile transmission as an example, uses the proposed method to carry out the lightweight design of the gear, and illustrates the specific realization process of the method.
[0081] First determine the materials that make up the FGM gear. Super duralumin 7A04 can be used to make light-weight gears. However, this aluminum cannot transmit too much torque and impact, otherwise it will fatigue and crack at the keyway or tooth root. Although its wear resistance and strength ...
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The invention discloses a method for using functionally graded materials to reduce weight of a gear. The method for using the functionally graded materials to reduce the weight of the gear includes: confirming a material distribution form of the FGM gear according to stress conditions of the gear, and confirming a material distribution function form of the FGM gear according to performance parameters of the FGM gear; then, building a multiple objective optimal model according to the material distribution function form; next, building the model and setting boundary conditions and parameters in software of finite element analysis, and using an experiment design method to obtain global static sensitivity; finally, solving the multiple objective optimal model according to the global static sensitivity, and optimizing performance of the gear, corresponding to a design variable figured out. The method for using the functionally graded materials to reduce the weight of the gear uses FGM to perform optimal design on the gear, uses a coefficient of a material distribution function as the design variable to perform micro parameter design, does not change bulk parameters of the size, the modulus, the tooth number and the like of the gear, greatly reduces the weight of the gear on the premise of maintaining normal work performance of the gear, and simultaneously can reduce material cost for manufacturing the gear.
Description
technical field [0001] The invention belongs to the technical field of gear optimization design, and in particular relates to a method for reducing the weight of gears by using functionally graded materials. Background technique [0002] Gear is one of the transmission parts widely used in machinery, and has the characteristics of large power range, high transmission efficiency, accurate transmission ratio and long service life. Modern gear transmission is developing in the direction of high speed, heavy load and light weight. Reducing the weight of gears can not only reduce the weight of the entire equipment, but also reduce the natural frequency of gears, thereby reducing meshing noise. Especially for large-scale transmission systems, the weight reduction of gears is of great practical value for reducing the useless power consumption of transmission parts and the energy consumption of starting and braking. Therefore, under the premise of ensuring the reliability, it is of...
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IPC IPC(8): G06F17/50
Inventor 敬石开张贺周竞涛孟欣佳宋国华
Owner BEIJING INSTITUTE OF TECHNOLOGYGY