Abstract

Tractor and earth-moving machine rollover has become one of the leading causes of occupational death in the agricultural/constructional industry. Therefore, these machines need proper protective structures to protect operators. In this study, explicit finite element (FE) analysis is adapted to predict the performance of rollover protective structure (ROPS) of a hydraulic excavator in the early design stage based on ISO 12117-2. The virtual test includes three sequential quasi-static loads applied in side, longitudinal and vertical directions, one at a time. Well-organized load sequence enables the simulation model to take the cumulative deformations caused by the three sequential loads into account and reduce the computational cost. A ROPS prototype is fabricated and tested to validate the FE model. The simulation-based results have a close agreement with the experimental test results. This FE-based safety prediction could be used to assess the new design in the early design stage to save design time and money.

摘要

拖拉机和推土机翻车已成为农业/建筑行业职业死亡的主要原因之一。因此，这些机器需要适当的保护结构来保护操作员。在这项研究中，显式有限元 (FE) 分析适用于预测基于 ISO 12117-2 的液压挖掘机早期设计阶段的翻车保护结构 (ROPS) 的性能。虚拟测试包括三个连续的准静态载荷，分别施加在侧面、纵向和垂直方向上，一次一个。组织良好的载荷序列使仿真模型能够将三个连续载荷引起的累积变形考虑在内，并降低计算成本。制造并测试 ROPS 原型以验证 FE 模型。基于模拟的结果与实验测试结果非常吻合。这种基于有限元的安全预测可用于在早期设计阶段评估新设计，以节省设计时间和金钱。