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| Analysis of buffering capacity of spherical harmonic granular materials based on the level set-discrete element method |
| Received:February 19, 2023 Revised:May 04, 2023 |
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| DOI：10.7511/jslx20230219001 |
| KeyWord:discrete element method spherical harmonic function level set method buffering capacity concave particle |
| Author | Institution |
| 刘芸松 |
大连理工大学 大连理工大学白俄罗斯国立大学联合学院, 大连 |
| 王嗣强 |
大连理工大学 工业装备结构分析优化与CAE软件全国重点实验室, 大连 |
| 季顺迎 |
大连理工大学 大连理工大学白俄罗斯国立大学联合学院, 大连 ;大连理工大学 工业装备结构分析优化与CAE软件全国重点实验室, 大连 |
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| Abstract: |
| Granular material is a common buffer material in nature and industry,and a large number of non-spherical particles with different morphologies exhibit complex mechanical properties and are used in different engineering fields.In this paper,irregularly shaped particles with different sphericity and surface concavity characteristics are constructed using spherical harmonic functions,and the contact points and collision forces between spherical harmonic particles are calculated by the level set method.Subsequently,the discrete element method is used to analyze the buffering capacity of spherical and concave-shaped particles during impact processes.The numerical results show that the granular bed thickness,impact velocity and particle shape significantly affect the buffering capacity of the spherical harmonic granular materials.The impact load peaks at the bottom of the granular bed decrease with increase of the granular thickness and surface concavity,while the impact load peaks increase with increase of the impact velocity and particle sphericity.Compared with spherical particles,spherical harmonic particles have concave-convex surfaces and multiple contact characteristics,which facilitate the expansion of impact loads in three directions and improve the buffering capacity of concave particles. |
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