Based on the basic principle of vehicle crash analysis using the finite element method, a car finite element model was built by using Hypermesh software. To simulate the front collision test of the car, the LS-DYNA so...Based on the basic principle of vehicle crash analysis using the finite element method, a car finite element model was built by using Hypermesh software. To simulate the front collision test of the car, the LS-DYNA software is adopted to calculate the deformation of the car and the acceleration time history curves during the crashing process;the anti-impact capability of the car is evaluated from this simulation. The results demonstrate that the improvement of local structure can promote the crashworthiness of the car, but the further improvement needs a major change of the car structure.展开更多
针对当前液压锚杆钻机回转机构的抗冲击能力弱、稳定性差、易损坏等不足,提出了一种基于ANSYS的液压锚杆钻机回转机构优化方案。通过分析液压锚杆钻的结构和凿岩原理,以回转机构的齿轮为研究对象,利用遗传算法结合ANSYS系统来完成齿轮...针对当前液压锚杆钻机回转机构的抗冲击能力弱、稳定性差、易损坏等不足,提出了一种基于ANSYS的液压锚杆钻机回转机构优化方案。通过分析液压锚杆钻的结构和凿岩原理,以回转机构的齿轮为研究对象,利用遗传算法结合ANSYS系统来完成齿轮关键参数的优化、三维模型的构建以及仿真分析。实验结果表明:优化后的回转机构起动过程较为平稳,稳定后的齿轮啮合接触力为960 k N,降低了齿轮发生损坏的概率;起动稳定后齿轮最大应力值为402.52 MPa,抗冲击能力提升明显。展开更多
文摘Based on the basic principle of vehicle crash analysis using the finite element method, a car finite element model was built by using Hypermesh software. To simulate the front collision test of the car, the LS-DYNA software is adopted to calculate the deformation of the car and the acceleration time history curves during the crashing process;the anti-impact capability of the car is evaluated from this simulation. The results demonstrate that the improvement of local structure can promote the crashworthiness of the car, but the further improvement needs a major change of the car structure.
文摘针对当前液压锚杆钻机回转机构的抗冲击能力弱、稳定性差、易损坏等不足,提出了一种基于ANSYS的液压锚杆钻机回转机构优化方案。通过分析液压锚杆钻的结构和凿岩原理,以回转机构的齿轮为研究对象,利用遗传算法结合ANSYS系统来完成齿轮关键参数的优化、三维模型的构建以及仿真分析。实验结果表明:优化后的回转机构起动过程较为平稳,稳定后的齿轮啮合接触力为960 k N,降低了齿轮发生损坏的概率;起动稳定后齿轮最大应力值为402.52 MPa,抗冲击能力提升明显。