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<p>The arch effect is a key factor that restricts the quality and energy efficiency of dense molding of mushroom slag. In this study, based on the discrete element simulation method, the mechanical response characteristics and the evolution law of the arch effect during particle compression with or without superimposed vibration force field are systematically investigated. Through the macro-, fine- and microscopic multi-scale research methods, the mechanism of the vibration field inducing convective motion of the particles to break the solidification of the force chain and achieve the destruction of the arch structure is revealed: the vibration energy drives the particle rearrangement, homogenizes the stresses, and facilitates the system to transform from a disordered to an ordered state, which effectively reduces the obstruction of the arch effect on the particle displacement during the molding process. By systematically analyzing the effects of different vibration parameters (frequency: 5, 10, 15, 20&#xa0;Hz; amplitude: 0.5, 1, 1.5, 2&#xa0;mm) and different compression speeds, it is concluded that the combinations of 15&#xa0;Hz, 2&#xa0;mm, and 5&#xa0;mm/s can maximize the weakening of the arch effect. This study elucidates the microscopic mechanism of vibration field regulating the molding process of biomass materials, which provides important theoretical support for optimizing the design of equipment for resource utilization of agricultural waste.</p> Graphical Abstract <p></p>

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Study on the Effect of Vibration on the Arching Effect of Dense Molding of Shiitake Mushroom Slag

  • 期刊论文

  • 发表日期：

    2026年2月7日

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  • Zhen Li,
  • Chao Fang,
  • Wenkai Wang,
  • Hongqiang Wang,
  • Jinlu Yu,
  • Hongyu Fu

摘要

The arch effect is a key factor that restricts the quality and energy efficiency of dense molding of mushroom slag. In this study, based on the discrete element simulation method, the mechanical response characteristics and the evolution law of the arch effect during particle compression with or without superimposed vibration force field are systematically investigated. Through the macro-, fine- and microscopic multi-scale research methods, the mechanism of the vibration field inducing convective motion of the particles to break the solidification of the force chain and achieve the destruction of the arch structure is revealed: the vibration energy drives the particle rearrangement, homogenizes the stresses, and facilitates the system to transform from a disordered to an ordered state, which effectively reduces the obstruction of the arch effect on the particle displacement during the molding process. By systematically analyzing the effects of different vibration parameters (frequency: 5, 10, 15, 20 Hz; amplitude: 0.5, 1, 1.5, 2 mm) and different compression speeds, it is concluded that the combinations of 15 Hz, 2 mm, and 5 mm/s can maximize the weakening of the arch effect. This study elucidates the microscopic mechanism of vibration field regulating the molding process of biomass materials, which provides important theoretical support for optimizing the design of equipment for resource utilization of agricultural waste.

Graphical Abstract