针对振动筛经常出现侧板开裂和横梁断裂的问题,通过增加多余约束改进了横梁结构。并从能量的角度用功率流法研究了横梁的动力学特性及能量分布情况。通过MatLab仿真得出结论,改进后的横梁功率流分布较原先横梁均匀,且传递到两侧侧板的能量有所降低,提高了横梁及侧板的寿命。 For the vibrating screen, the problem of the cracking of the side plate and the beam often occurs, and the beam structure is improved by adding redundant constraints. From the energy point of view, the dynamic characteristics and energy distribution of beam were studied by power flow method. According to the conclusion of MatLab simulation, the improved beam power flow distribution is more uniform than the original beam, and the energy transmitted to the side plates is reduced, which improves the service life of the beams and the side plates.