基于刚柔耦合模型的整车平顺性匹配优化
Matching and optimization of vehicle ride comfort based on rigid-flexible coupling model
廖映华 1杨智 1王振新 2刘长钊3
作者信息
- 1. 四川轻化工大学 机械工程学院,四川 宜宾 644000
- 2. 宜宾凯翼汽车有限公司汽车工程研究院,四川 宜宾 644000
- 3. 重庆大学 机械与运载工程学院,重庆 400000
- 折叠
摘要
以提升某纯电动汽车的平顺性为目的,在ADAMS中搭建了基于刚柔耦合模型的整车多体动力学模型,将模型应用于ADAMS/Ride模块中的四立柱仿真试验台进行平顺性仿真实验,对照实车在标准四立柱台架上的道路模拟实验,验证仿真模型的有效性.选取前、后悬架系统的弹簧刚度和减振器阻尼特性为设计变量,采用中心组合设计法设计得到平顺试验方案,使用整车多体动力学模型进行平顺性试验,根据试验结果数据建立以驾驶员质心处的总加权加速度均方根为响应的响应面近似模型,基于响应面近似模型对整车行驶平顺性进行优化设计,得到了优化后的前、后悬架系统参数方案.结果表明:优化后的车辆以50 km/h的速度在沥青路面上行驶时,驾驶员质心处的总加权加速度均方根值降低了7.6%,整车平顺性得到显著提升.
Abstract
To enhance the ride comfort of an electric vehicle,we build a comprehensive multi-body dynamic model grounded in rigid-flexible coupling principles within the ADAMS platform.The model undergoes validation through comparative analysis,where simulations of ride comfort on a virtual four-poster test rig within the ADAMS/Ride module are juxtaposed with actual road simulation tests performed on a real vehicle mounted on a standardized four-poster bench.The spring stiffness and shock absorber damping characteristics of both the front and rear suspension systems are identified as key design variables.A tailored experimental design,employing the Central Composite Design(CCD)methodology is devised to generate a comprehensive test plan.Then,a response surface methodology approximation model is formulated,utilizing the test data,with the root mean square of the total weighted acceleration at the driver's centroid serving as the primary response indicator.Leveraging this RSM model,we initiate an optimization process,improving the vehicle's ride comfort.The outcome is a set of optimized parameters for the front and rear suspension systems.Notably,when the optimized vehicle drives on an asphalt road at a speed of 50 km/h,the RMS value of the total weighted acceleration at the driver's centroid decreases by 7.6%,markedly improving the vehicle's ride comfort.
关键词
平顺性/纯电动汽车/响应面法/刚柔耦合模型/ADAMSKey words
ride/battery electric vehicle/response surface method/rigid-flexible coupling model/ADAMS引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据