The research on vibration reduction and noise reduction of aviation spiral bevel gear transmission has always been the focus of the industry. Due to the high power density requirements of aviation spiral bevel gears, the thin spoke structure is widely used. In order to reduce the weight of the gear, a certain number of weight reduction holes are usually designed on the web. In the process of spiral bevel gear transmission, the vibration caused by transmission error is transmitted step by step through the path of tooth surface → web plate → shaft → bearing → bearing pedestal → box. Therefore, it is of great benefit to improve the transmission stability of the main spiral bevel gear if structural optimization is carried out from the web hole closest to the vibration source to reduce vibration.
Fang Zongde et al. studied the influence of web structure flexibility on the dynamic characteristics of spiral bevel gear system. Zhao Ning et al. obtained a group of structural parameters through orthogonal test method and hybrid genetic algorithm to avoid traveling wave resonance of the wheel body under working conditions. Wu Bin et al. found out the influence of the number and size of different web holes on the natural characteristics. Shen Yunwen et al. studied the influence of different support forms and structural dimensions of spiral bevel gear web on the dynamic load of the system. Cai Xianxin et al. proposed the establishment method of the mathematical model for the optimization of the spoke of spiral bevel gears, which significantly improved the efficiency of the optimization of the spoke. CARMIGNANI C et al. analyzed the dynamic response characteristics of spiral bevel gears through simulation and obtained their stress distribution. Wang Dayong studied the natural frequency and vibration mode of the thin spoke gear, and drew the dynamic stress curve of the spiral bevel gear at the resonance speed and the working speed, which has guiding significance for the check and optimization of the spoke stress. WANG PY and others deeply considered the influence of bearing stiffness, gear error and tooth surface friction, and analyzed the dynamic stress and vibration response of spiral bevel gears. Luan Xiaochi et al. studied the resonance characteristics and stress distribution of the driven spiral bevel gear when the traveling wave resonance occurred by combining the transient contact dynamics analysis method with the experimental verification.
At present, the pass design of high-speed thin spoke spiral bevel gear has not been paid enough attention, and the design mainly depends on experience, which has some blindness, so it is difficult to obtain a more reasonable pass structure. This paper explores a process for optimizing the structure of the weight reduction hole. Combining with the widely used finite element analysis software Abaqus, the dynamic response of a certain type of aviation spiral bevel gear with different passes is analyzed and compared. The reasonable pass is obtained by using orthogonal experimental design and dynamic simulation analysis, and the structural parameters of the pass are optimized to reduce the vibration response and transmission intensity of the meshing excitation of the spiral bevel gear.