柔性齒圈動(dòng)態(tài)特性解析研究
[Abstract]:Time-varying meshing excitation is the main exciting source of gear transmission. The gear ring is the main path of vibration energy transfer. In order to reduce vibration and noise, it is necessary to deeply study the dynamics of gear ring, reveal the relationship between key parameters and response, and provide theoretical basis for dynamic design and reasonable selection of working point. The main contents of this paper are as follows: (1) the gear ring is regarded as a flexible rotating ring which is subjected to some moving stiffness, and the mathematical model of in-plane bending vibration without extension is established by using the Hamiltonian principle. The influence of Coriolis acceleration is taken into account in the model. (2) the mode operation law is studied by direct perturbation method, and the relationship between the basic parameters and natural frequency splitting and mode coupling is revealed. A parameter selection method for suppressing or eliminating frequency splitting and mode coupling is provided. (3) the problem of parameter stability is studied, and the dynamic tuning effect of meshing phase and degree of coincidence on the response is analyzed. The relationship between the number of teeth and the number of planetary gears and the stability of parameters is revealed, which provides a dynamic basis for the selection of planetary transmission parameters. (4) the influence of pinion grouping mode on dynamic characteristics is discussed. The laws of distribution state, natural frequency splitting and mode coupling are revealed. At the same time, a method of equivalent grouping of pinion gears to suppress frequency splitting and mode coupling is proposed. This paper is an extension study of National Foundation, Research on Topology selection of rotational Ultrasonic Power (No. 51175370). In this paper, the intrinsic relations between key parameters and frequency splitting, mode coupling and parametric stability are revealed, and the dynamic tuning theory of symmetric systems is enriched and developed.
【學(xué)位授予單位】:天津大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2012
【分類(lèi)號(hào)】:TH132.4
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