Fulike Houseware&Gifts Co.,Ltd. , https://www.cnfulike.com
Study on Mechanism of Vibration and Radiation Noise of Gear Structure (Northwestern Polytechnical University, Xi'an 710072, China), Shao Jinping, Sun Jincai, Shen Yunwen, Zhao Ning, and Vibration Response, Deducing the Quantitative Relationship Between Elastic Vibration Modal Parameters and Acoustic Modal Parameters, Obtaining Gear Structure The vibration acoustic radiation characteristic parameters and the sound power are used together to form a sound field due to the vibration of the circular plate. In the spherical coordinate system, the total loss factor n total loss factor is equal to the ratio of the total consumption Ed to the vibration energy Ep, and the total loss power. The Wd and the vibration energy Ep should be equal to the sum of the power consumption Wdns and the vibration energy Ens of the respective natural modes (n, s), that is, the power consumption and vibration energy of the natural mode, the modal damping coefficient Cm and the critical modal damping coefficient. C0.ns is used to represent the point on the surface. The radius of the sphere is calculated by R. The axial displacement of the front circular plate is u2 and d is substituted into the equation (16). The effective value of the sound pressure Pr is å©=(1) The acoustic power of the radiation is 4 Theoretical calculation And from the above calculation results, it can be seen that the total loss factor theory agrees well with the experiment. The theoretical results of the disc guide and the experimental sound and the experimental g sound power in the high frequency band theoretical value and the experimental kiss is good, but in the low frequency bookmark2 table 1 inherent characteristic parameter order mode mass mode modal stiffness mode amplitude mode phase angle Vr segment The big difference, for the sound radiation, we are concerned about its medium and high frequency characteristics, so the above theoretical research process is more reasonable, the gear is treated as an elastic circular plate, from the elastic dynamics, the entire acoustic characteristic parameters are obtained. The analysis process is feasible and the calculation formula can be used to estimate the radiated noise of the gear.
5 Conclusions From the kinetics, the dynamic analysis of the gear body is carried out, and the quantitative relationship between the vibration modal parameters and the acoustic modal parameters is established, and the sound power of the gear radiated noise is obtained. The whole analysis process is reasonable. The resulting calculation formula can be used to calculate the radiated noise of the gear. Therefore, a new research method for gear noise prediction is proposed.