Research on gear modification and modal optimization of centralized transmission system based on genetic algorithm

doi:10.3785/j.issn.1006-754X.2024.04.301

Chinese Journal of Engineering Design

2024, Vol. 31

Issue (3): 340-347 DOI: 10.3785/j.issn.1006-754X.2024.04.301

Mechanical Optimization Design

Research on gear modification and modal optimization of centralized transmission system based on genetic algorithm

Xiaobo YU^1,²(

),Sujiao CHEN^1,²(

),Yonghua ZHANG^1,²,Binjun MA^1,²

^1.Driveline Research and Development Department, Liugong Liuzhou Driveline Co. , Ltd. , Liuzhou 545007, China
^2.Guangxi Liugong Machinery Co. , Ltd. , Liuzhou 545007, China

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Abstract

The centralized transmission system has a compact layout and close component spacing, which puts forward higher requirements for its NVH (noise, vibration, harshness) control. Taking the centralized transmission system of an engineering machinery as the research object, firstly, the vibration and noise test was carried out, and the principle of gear micro-modification was analyzed. Secondly, the mutual coupling of system modal resonance and gear meshing was considered, the finite element model of the transmission system was established, and the simulation results showed that the simulation results of gear pair contact patches and modes were consistent with the test results, which verified the feasibility of the modeling method. Then, based on genetic algorithm, the gear micro-modification parameters were solved, the optimal design of the gear micro-modification was realized, and the resonance of the system was avoided by modal optimization. Finally, the experimental verification was carried out, and the results showed that the noise of the transmission system sample was reduced to 95.2 dB after the gear modification, which was 4.8 dB lower than that before modification. The vibration and noise of the transmission system can be reduced by using micro-modification and modal optimization method based on genetic algorithm, which provides a reference for NVH control of the centralized transmission system.

Key words： transmission system genetic algorithm micro-modification modal analysis transmission error

Received: 10 March 2024 Published: 27 June 2024

CLC:

TH 113

Corresponding Authors: Sujiao CHEN E-mail: yuxiaobo@liugong.com;chsj@liugong.com

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Cite this article:

Xiaobo YU,Sujiao CHEN,Yonghua ZHANG,Binjun MA. Research on gear modification and modal optimization of centralized transmission system based on genetic algorithm. Chinese Journal of Engineering Design, 2024, 31(3): 340-347.

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https://www.zjujournals.com/gcsjxb/10.3785/j.issn.1006-754X.2024.04.301 OR https://www.zjujournals.com/gcsjxb/Y2024/V31/I3/340

基于遗传算法的集中式传动系统齿轮修形及模态优化研究

集中式传动系统布局紧凑，部件间距小，因此对其NVH（noise, vibration, harshness，噪声、振动与声振粗糙度）控制提出了更高要求。以某工程机械的集中式传动系统为研究对象，首先，进行了其振动噪声测试，并分析了齿轮微观修形原理；其次，考虑了系统模态共振与齿轮啮合的相互耦合，建立了该传动系统的有限元模型并进行仿真，结果显示，齿轮副接触斑点和模态的仿真结果与测试结果一致，验证了建模方法的可行性；接着，基于遗传算法求解了齿轮微观修形参数，实现了齿轮微观修形的最优设计，并通过模态优化来避免系统共振；最后，进行实验验证，结果表明，齿轮修形后传动系统的噪声降低至95.2 dB，比修形前下降了4.8 dB。采用基于遗传算法的齿轮微观修形和模态优化方法可以降低传动系统的振动噪声，这为集中式传动系统的NVH控制提供了一定参考。

关键词： 传动系统, 遗传算法, 微观修形, 模态分析, 传递误差

Fig.1 Centralized transmission system of an engineering machinery

Fig.2 Vibration and noise test site of centralized transmission system

Fig.3 Colormap analysis results of vibration and noise test data of centralized transmission system

Fig.4 Principle of gear micro-modification

Fig.5 Model of centralized transmission system

Fig.6 Comparison of contact patches of transmission gear pairs obtained by testing and simulating

Fig.7 The first mode of centralized transmission system before optimization

Fig.8 The first mode of centralized transmission system after optimization

Table 1 Target parameters for the first-stage driving gear

Fig.9 Optimization results of modification scheme of first-stage driving gear

Fig.10 Relation between peak-to-peak value of transmission error and normal load per unit length of tooth surface

Fig.11 Relationship between gear micro-modification parameters and peak-to-peak value of transmission error

Table 2 Micro-modification parameters of driving gear

Fig.12 Comparison of meshing line offset of gear pairs before and after modification

Fig.13 Normal load per unit length of tooth surface after modification

Fig.14 Comparison of noise of centralized transmission system sample before and after modification

Fig.15 Modal analysis result of centralized transmission system sample before and after modification


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