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Analyses on the roller structure of equivalent honeycombs for forest harvester under impact loading

机译：冲击载荷下森林收割机等效蜂窝辊结构分析

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摘要

The roller honeycomb feeding roller (RHFR) of forest harvester in logging was raised for reducing damage to logs. The equivalent relationship of roller double V-wings honeycomb (RDWH) were proposed and analytically derived in the mass, platform stress and elastic modulus. The finite element models of RDWH with various cell densities under the equivalent relation were established. The mechanical properties, energy absorption characteristics, impact response, structural stability, structure efficiency and improvement performance efficiency of RDWH under compression impact were investigated in comparison with roller hexagonal honeycomb (RHH). The RDWHs with equivalent relationship had approximate mechanical properties under unit compression displacement. The RDWH, benefiting from the NPR enhancement phenomenon in deformation, possessed about multiple times of mechanical properties and energy absorption efficiency than RHH. The performance efficiency of RDWH related to cell densities and cell layers in "PVP" and "Bunching Phase" trend. The RHFR exceeded that of the steel feeding roller (SFR) with about 2 times in maximum contact area under the corresponding contact force. The phenomenon of "sequential increment" and "uprush stage" appeared in contact area of RHFR for G(i) groups were recorded with relating of cell densities and cell layers, which provided significance on reducing damage to logs.
机译：测井中森林收割机的滚子蜂窝喂养辊（RHFR）以降低对原木的损坏。提出了辊双V型蜂窝状（RDWH）的等同关系，并分析质量，平台应力和弹性模量。建立了在等同关系下具有各种细胞密度的RDWH的有限元模型。研究了RDWH在压缩冲击下的力学性能，能量吸收特性，冲击响应，结构稳定性，结构效率和改善性能，与辊六方蜂窝状（RHH）相比。具有等同关系的RDWHS在单元压缩位移下具有近似的机械性能。从NPR增强现象的变形中受益于RDWH的RDWH，具有大约多次机械性能和能量吸收效率而不是RHH。与“PVP”和“划分相位”趋势的细胞密度和细胞层相关的RDWH的性能效率。 RHFR在相应的接触力下超过最大接触面积的钢送料辊（SFR）的大约2次。通过关联细胞密度和细胞层的rhFr的接触面积中出现“顺序增量”和“UPRUSH阶段”的现象，这是关于降低对日志损伤的重要性。

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