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基于有限元法建立多孔球面栅极板的结构模型,计算结构在离子流冲击载荷作用下的振动响应,分别考虑正方形和菱形两种不同布孔方式及不同开孔半径对结构性能的影响,得到栅极中心点处的位移、速度和加速度运动规律,以及螺栓与法兰连接处的应力响应。结果表明,不同的布孔方式和开孔半径对结构的性能有一定的影响,而正方形布孔方式更加合理;孔径的大小也影响结构的承载能力。通过对多孔球面栅极板的冲击振动分析,可以为多孔材料的安全设计提供有效的理论依据。
Based on the finite element method, the structural model of the porous spherical grid plate was established and the vibration response of the structure under the impact load of the ion current was calculated. The influence of the square and rhombic holes and the different hole radius on the structural performance were considered respectively. Displacement, velocity and acceleration at the center of the grid, as well as the stress response at the joint of the bolt and the flange. The results show that different hole patterns and hole radii have certain influence on the structure performance, but the square hole pattern is more reasonable. The size of the hole also affects the bearing capacity of the structure. Through the analysis of the impact vibration of porous spherical grid plate, it can provide an effective theoretical basis for the safe design of porous materials.