摘要
由于矿用自卸车的悬架结构形式特殊,研究车辆抗制动纵倾性的传统分析方法并不适用于解决其'制动点头'问题.鉴于此,本文以中性面和力矩中心为基点,进行悬架平跳试验仿真和整车直线制动仿真,得到了车轮着地点运动轨迹、悬架纵向角刚度等相关参数,进而得到了整车的纵向稳定性系数.并以其为目标函数,以悬架参数为优化变量,对矿用自卸车纵倾性进行优化.优化后的仿真结果表明,悬架的纵向稳定性系数提高了19.04%,前悬架的点头量和车身俯仰角则分别减小了18.23%和15.25%.该矿用车自卸车的'制动点头'现象得到明显改善.
Because of the special forms of the suspensions of the mining dump truck （MDT）, common methods can not be used to solve the problem of ＂braking nod＂. In view of those, based on the neutral plane and the moment center, suspension parallel bench test simulation and vehicle braking simulations were conducted to get the wheels＇ contact point trajectory and the suspension longitudinal angle stiffness and so on. And then, the value of suspension longitudinal stability coefficient was obtained. It was identified as the target function, and the optimal variables were the suspension parameters, the pitching performance of MDT was optimized. The simulation result has shown that the suspension longitudinal stability coefficient is increased by 19.04%, the nodded size of the front suspension and the pitch angle decreased by 18. 23% and 15. 25%, respectively. The ＂braking nod＂ phenomenon of the mining dump truck was improved noticeably.
出处
《湖南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2013年第7期46-52,共7页
Journal of Hunan University:Natural Sciences
基金
国家高技术研究发展计划(863计划)资助项目(2012AA041805)
国家自然科学基金资助项目(7150080050)
湖南省科技攻关计划重点项目(O6FJ2001)
教育部长江学者与创新团队发展计划资助项目(531105050037)
湖南大学汽车车身先进设计制造国家重点实验室自主课题项目资助(60870001)
湖南省科技重大专项项目(2010FJ1003)
关键词
油气悬架
矿用自卸车
力矩中心
悬架参数
纵向稳定性系数
hydro-pneumatic suspension
mining dump truck
moment center
suspension parameter
longitudinal stability coefficient
