摘要
针对坦克装甲车辆在越野机动能力方面的迫切需求,开展了履带式行动系统动力学建模研究.整理得到多体动力学方程变分形式的矩阵表达式,提出以笛卡儿坐标和相对坐标相结合的方式分别推导车体和平衡肘-负重轮对系统广义坐标的贡献方程组,同时考虑了履带对车体及负重轮的受力关系,以及履带节距对地面的滤波作用.通过数值计算在频域对比分析了不同路面和车速下车体加速度和悬挂相对行程随阻尼比变化的影响规律,确定了基础阻尼比,进一步在时域环境对悬挂系统不同轮位和单轮压缩与复原行程的阻尼特性配比进行优化,通过相同路面的仿真对比得出的分配结果能够有效提高车辆的行驶平顺性和越野通过性能,为制定行动系统预测设计方法奠定了基础.
To address the urgent need for the off-road mobility of tracked vehicles, the dynamic model of the caterpillar running system isstudied. The matrix expression is derived in the variational form of a multibody dynamic equation, and the vehicle global Cartesiancoordinates and balance elbow-road wheel relative coordinates are formulated in terms of the generalized coordinates of the system.Moreover, the interaction of the track, road wheel, vehicle body, and the filter effect of the caterpillar pitch acting on the roadexcitation is considered. The effects of the damping ratio on the acceleration of the vehicle body and the relative stroke of thesuspension under different road excitations and speeds are explored in the frequency domain. The main damping ratio is determined,and the damping characteristic configurations of the suspension system in different wheel positions and different stroke positions areoptimized. The results show that the rational damping configuration is effective in improving the ride comfort and off-roadperformance of the vehicle, which can provide a basis for developing a method for predicting and designing the operations of high-mobility tracked vehicles.
作者
陈轶杰
张亚峰
徐龙
杜甫
郑凤杰
CHEN Yi Jie;ZHANG YaFeng;XU Long;DU Fu;ZHENG FengJie(China North Vehicle Research Institute,Beijing 100072,China;School of Mechanics and Vehicles,Beijing Institute of Technology,Beijing 100081,China)
出处
《中国科学：技术科学》
EI
CSCD
北大核心
2023年第9期1545-1555,共11页
Scientia Sinica(Technologica)
基金
国家自然科学基金(批准号:51875536)资助项目。
关键词
高机动履带车辆
行动系统
多体动力学
阻尼比
high-mobility tracked vehicle
running system
multibody dynamics
damping ratio
