摘要
从矿用车平顺性角度研究油气弹簧结构的设计和优化。建立参数化油气弹簧的非线性数学模型,将其引入至整车多体动力学模型,并分析该车在随机路面上的平顺性。根据平顺性的要求与该车簧载质量大的特点,选择簧载质量质心垂直振动加速度作为目标函数。针对该非线性整车悬架优化问题,采用移动最小二乘法构造近似模型,结合遗传算法优化油气弹簧参数,提高整车平顺性。并用相同的方法优化简化半车振动模型,且将半车模型优化参数代入至整车模型进行对比分析。结果表明基于整车模型的悬架优化能获得更低的垂向加速度。
The heavy hydro-pneumatic spring design and optimization are simultaneously explored in terms of ride comfort. A parametric nonlinear hydro-pneumatic spring model is developed and incorporated into full vehicle muhi-body dynamic model, and the ride comfort of full vehicle is investigated under random road inputs. Based on the requirements of ride vibration and the feature of heavy sprung mass, the bounce acceleration at center of gravity of sprung mass is chosen as the cost function for the hydro-pneumatic spring optimization. For the optimization of full vehicle with nonlinear spring, the moving least square response surface and genetic algorithm were utilized to improve the ride comfort. The same method is also used to optimize the hydro- pneumatic spring parameters based on another simplified half vehicle model. And the comparison analyses of ride vibration of full vehicle are carried out with the two sets optimized parameters. The obtained results indicate that smaller bounce acceleration can be achieved when the optimization is based on the full vehicle.
出处
《机械强度》
CAS
CSCD
北大核心
2013年第5期599-604,共6页
Journal of Mechanical Strength
基金
国家自然科学基金(11102066)
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(61075003
51175001)资助~~
关键词
油气弹簧
优化设计
整车模型
半车模型
Hydro-pneumatic spring
Optimal design
Full vehicle model
Half vehicle model
