圆锥腔体非阻塞性颗粒阻尼减振特性研究

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中图分类号：TB535 文献标志码：A 文章编号：1000-4939（2025）04-0801-07

Abstract：The pressure distribution among particle layers of a non-obstructive particle damper （NOPD） will be affected by its cavity shape，and the damping performances of which willbe also influenced.On the basis of the discrete element method （DEM），the damping characteristics of the NOPD with a conical cavity are studied.Firstly，the theoretical model of NOPD is established and verified through the comparison with the experimental data.Then，key structural parameters including the filling ratio，volume ratio（individual particle volume to cavity volume）and inclination of the conical cavity wallare studied for their influence on the NOPD's damping characteristics.The analysis reveals O.6 as the optimum filing ratio of the conical cavity NOPD，and the optimum filing ratio will not be effected by the inclination of the conical cavity wall. Moreover，the damping performance comparison between NOPDs with conical cavity and cylindrical cavity is studied under the same filing ratio.The damping performance of the NOPD with conical cavity is better when the filling ratio is lessthan O.6，because the energy dissipation due to particle colisions is more in the NOPD with conical cavity. While its damping effect is worse when the filling ratio is greater than O.6，the particles are obstructed due to the conical cavity.In addition，the inclination of the conical cavity wall is in the range of 45∘-55∘ ，and volume ratio is O.000 32.

Key words：NOPD; conical cavity; DEM;damping performance ;inclination of the conical cavity wall

阻尼器作为一种传统的被动减振技术被用于大多数工程领域中。（剩余11486字）