基于CATIA的汽车横向稳定杆的参数化设计

参数化设计在产品的优化设计中发挥着重要作用。为完成汽车横向稳定杆的参数化设计,文章推导出横向稳定杆尺寸参数的约束公式,并在此基础上建立基于CATIA的稳定杆参数化模型,将模型与Excel表格相关联,实现参数驱动横向稳定杆的自动重构,完成横向稳定杆的参数化设计。运用Abaqus软件建立横向稳定杆有限元模型,校核结果验证了稳定杆参数化设计的正确性。     

带橡胶套的稳定杆有限元分析

采用HyperMesh软件建立了横向稳定杆的有限元模型，采用实验数据和MSC．Marc软件建立了橡胶衬套的模型，按照实际的受力与约束对横向稳定杆的应力与变形进行了仿真计算研究，计算结果得到了试验结果的验证。     

基于ADAMS软件的汽车前横向稳定系统分析与改进

应用ADAMS软件,建立了某车型前横向稳定系统的多体运动学模型,针对稳定杆橡胶衬套磨损问题,对车轮动态跳动时该系统参数的变化进行了仿真分析.依据分析结果,提出增加稳定杆衬套厚度、将卡箍和橡胶衬套的接触面改为圆弧面、更改下横臂稳定杆卡箍支架在下横臂的焊接角度等改进方案,解决了该车型前横向稳定杆衬套的早期磨损问题.     

某载货车横向稳定杆有限元分析

文章建立了某载货车横向稳定杆有限元模型,并应用Mooney-Rivlin模型模拟橡胶衬套,通过计算机仿真,分析了横向稳定杆应力,并与试验结果进行对比,结果表明仿真值与试验值吻合,进而验证了分析方法的合理性。     

横向稳定杆性能计算及其影响因素分析

基于对横向稳定杆的受力分析,推导出其等效在车轮处的侧倾角刚度,给出了稳定杆截面相当应力的计算公式和最大应力横截面的位置。求出了悬架在最恶劣工况下横向稳定杆的强度条件,进一步分析了稳定杆安装位置和结构参数对其侧倾角刚度和最恶劣工况下应力的影响,并提出了横向稳定杆的若干设计要点。     

某车型稳定杆侧倾刚度微调研究

针对乘用车底盘调校中,为精准适配悬架的侧倾刚度,受稳定杆制造工艺能力限制,无法满足稳定杆直径尺寸在1mm内的渐增微调问题,本文利用车辆耦合动力学理论与最小二乘法下的多项式拟合法则,提出了一种利用增加横向稳定杆衬套径向刚度完成某车型悬架等效侧倾刚度匹配方法,并基于Adams/car软件对约束条件下的等效结果进行仿真量化计算,得出了在稳定杆1mm内的渐增直径及安装衬套制造工艺内的相关函数关系式。结果表明,在稳定杆安装衬套径向刚度值1KN/mm～8KN/mm范围内,可以满足某乘用车稳定杆直径23mm～24mm的微调效果,所得出的函数拟合公式为横向稳定杆橡胶衬套在该车型悬架设计和底盘调校提供了非常实际的工程参考。     

基于某自卸车前悬稳定杆卡箍的改进分析

针对一款自卸车前悬系统横向稳定杆卡箍螺栓松动的现象,运用ADAMS建立了前悬系统动力学模型,在E级随机路面激励下得出稳定杆卡箍螺栓在垂向方向上受力较大并有较大的运动量;随后运用ANSYS建立稳定杆系统的有限元模型,对与卡箍螺栓连接的卡箍座施加强制位移,发现螺栓孔有较大变形。通过改进卡箍结构形式,再次利用ANSYS软件进行仿真,经过数据对比分析,改进后的卡箍薄弱位置最大应力较改进前减少了85.5%、螺栓孔变形减少了75%左右,零件可靠性得到明显改善。     

温湿翘曲对连续配筋混凝土路面配筋设计的影响

对连续配筋混凝土路面(CRCP)进行配筋设计时,现行规范和研究将路面板当作均匀板,忽略了相对湿度对混凝土物理力学性质的影响。针对CRCP的结构特点和配筋设计的不足,利用薄板小挠度翘曲理论,推导了非均匀混凝土板湿度翘曲应力的解析公式。根据解析公式和温湿等效原则,计算了湿度梯度对应的等效温度梯度。实测了混凝土板在不同工况条件下的相对湿度分布曲线,回归了混凝土板相对湿度的分布方程。将等效温度梯度计算值和温度梯度代表值分别代入Westergaard公式和ABAQUS有限元模型,计算温湿翘曲应力。两者翘曲应力的最大计算值相差3.5%,满足工程精度的要求,验证了有限元模型的合理性。赋予混凝土板钢筋网片,建立了CRCP有限元模型;利用实测湿度数据,分析了温湿耦合梯度作用下,钢筋应力、裂缝缝隙位移和翘曲应力的分布规律。主要结论有:非均匀板的等效负温度梯度比均匀板大8%～10%;基层滞水会显著增强混凝土板的湿度变形;温湿耦合梯度作用下,钢筋的拉应力从板中到横向裂缝位置显著增大,最大达到89.13 MPa;混凝土的最大翘曲应力为1.69 MPa,位于面板的中心;钢筋埋置位置的缝隙位移沿横向呈二次抛物线分布规律;温湿翘曲应力和缝隙位移随着裂缝间距的增大而增大。     

某型车辆横向稳定杆的结构仿真及优化

为了评估车辆横向稳定杆的结构合理性,并对其结构进行优化设计,对某车辆横向稳定杆进行了分析。建立了该型稳定杆的1/2有限元模型,研究了原结构在载荷作用下的位移和扭转刚度,得到其应力云图与危险位置。在此基础上,以减小局部应力为目标,在不明显降低稳定杆的结构刚度和增大质量的前提下提出结构优化方案。采用有限元分析评估不同的优化方案,并确定了稳定杆的最优结构。研究确定了横向稳定杆的危险位置,并通过优化设计显著降低了其最大应力,能够为车辆横向稳定杆的结构设计和优化提供参考。     

商用车驾驶室悬置系统横向稳定杆简化模型及整车平顺性仿真分析

研究了驾驶室悬置系统平顺性分析中横向稳定杆的简化建模方法,提出用螺旋弹簧等效替代横向稳定杆的弯扭弹性特性;在考虑横向稳定杆作用的前提下建立全浮式驾驶室商用车悬置系统平顺性分析的整车参数化模型,并针对典型车辆进行仿真,对仿真结果采用滤波网络加权方法进行综合评价.     

变截面悬架稳定杆刚度计算与分析研究

以汽车变截面悬架稳定杆为研究对象,基于卡氏定理推导了该类型悬架稳定杆扭转刚度计算公式,并与CAE仿真分析结果进行对比,结果表明两者吻合良好。基于文中推导的扭转刚度计算方法,以某型实际车辆稳定杆为例,分析并研究了空间安装角、过渡区圆角半径、中间部位杆径及长度对扭转刚度的影响规律。最后结合实际底盘调试工作,提出了一种可快速改变稳定杆扭转刚度的改制方案,降低了调试成本并提升了调试效率。     

在excel表中实现某车型行李箱盖扭簧计算

文章从阐述扭杆弹簧的安装及受力状态开始,分析扭杆弹簧在行李箱关闭、开启位置及开启过程等工作状态下的受力.总结扭杆计算过程中用到的公式,利用excel文件中强大的数据处理及公式编辑功能实现了行李箱盖扭杆弹簧的受力分析.经过大量对现有行李箱盖及扭杆弹簧的实际测试,得出测量数据与计算数据基本符合,表明excel文件可以应用于行李箱盖弹簧的设计计算.     

A Feasibility Study on Indirect Identification of Transmission Forces through Rubber Bushing in Vehicle Suspension System by Using Vibration Signals Measured on Links

This paper presents a feasibility study on using the rubber bushing itself as a sensor for the identification of transmission forces in vehicle suspension systems. The method starts from the idea that the transmission forces can be related to the deformation of the rubber bushing by an appropriate model and the deformation of the rubber bushing can be obtained by estimation of the relative vibration across the bushing. Simple theories are presented to deal with modeling of a given geometry of rubber bushing by a concentric spring and damper, correlating of measurements of the vibration on the links to the stiffness and damping parameters, and selection of the vibration measurement positions. Importance of the measurement position selection in relation to the measurement noise is illustrated by simulation studies. Then, validity of the proposed indirect approach will be shown by applications to a rear suspension system of dual link type.     

A Feasibility Study on Indirect Identification of Transmission Forces through Rubber Bushing in Vehicle Suspension System by Using Vibration Signals Measured on Links

This paper presents a feasibility study on using the rubber bushing itself as a sensor for the identification of transmission forces in vehicle suspension systems. The method starts from the idea that the transmission forces can be related to the deformation of the rubber bushing by an appropriate model and the deformation of the rubber bushing can be obtained by estimation of the relative vibration across the bushing. Simple theories are presented to deal with modeling of a given geometry of rubber bushing by a concentric spring and damper, correlating of measurements of the vibration on the links to the stiffness and damping parameters, and selection of the vibration measurement positions. Importance of the measurement position selection in relation to the measurement noise is illustrated by simulation studies. Then, validity of the proposed indirect approach will be shown by applications to a rear suspension system of dual link type.     

连续配筋混凝土路面温度应力分析

基于钢筋混凝土间粘结滑移的线性和非线性本构关系,建立了连续配筋混凝土路面(CRCP)在温度荷载作用下的力学模型以及按接触理论推导的有限元刚度矩阵。得出了考虑粘结滑移线性和非线性本构关系的有限单元数值解,据此分析了降温荷载作用下路面应力、位移的分布规律。同时讨论了裂缝间距和配筋率、配筋方式对裂缝宽度的影响。结果表明,在相同的降温荷载作用下,随着裂缝间距的增大,钢筋和混凝土的应力呈现非线性增加;采用不同配筋方式对裂缝宽度的影响较大,建议设计时尽量采用小直径多根数的配筋方式。按接触有限元法进行温度应力的非线性分析,为今后的科研和设计提供了很好的理论依据。     

Design Synthesis of a Vehicle Suspension System Using Multi-Parameter Qptimization

The transmission of road-generated vibrations into a vehicle body is treated as a source-path-receiver problem. The suspension system acts as the path, and improved isolation can be achieved by having a single compliant bushing at the connecting point of the shock absorber to the body with none at the other end. A mathematical model is derived for such a system which would enable detailed parameter investigation to be undertaken using the gradient method of optimization. An expression for the absolute displacement transmissibility of the body is derived and the optimization procedure is applied in order to evaluate the optimum values of the non-dimensional variables involved. This minimizes the maximum motion transmitted to the body from the road surface over a broad frequency range. Design data which are presented non-dimensionally for parameter variations show the influence of three variables: the bushing stiffness, the resonant frequency ratio and the damping coefficient upon the transmissibility.     

燃料电池大客车悬架导向机构优化

针对与普通客车相比,燃料电池大客车具有重心高、簧载质量大等特点.采用传统客车悬架的参数与尺寸已不能满足整车稳定性要求.基于ADAMS环境建立燃料电池大客车悬架参数化模型,对横向稳定杆、推力杆的安装硬点坐标及横向稳定杆的截面尺寸进行了优化,基于应力一强度干涉理论,对推力杆截面尺寸进行了可靠性设计.运动分析表明优化结构无运动干涉,优化后燃料电池大客车稳定性达到了普通客车的水平,为燃料电池大客车的悬架导向机构设计提供了方法参考.     

New nonlinear bushing model for general excitations using Bouc-Wen hysteretic model

Because the characteristics of rubber bushing significantly affect the accuracy of vehicle dynamics simulations, they should be accurately modeled in the vehicle suspension model. In this paper, a new nonlinear bushing model for automotive bushing components is developed to improve the accuracy of vehicle dynamics analysis. Bushing components were first tested to capture the nonlinear and hysteretic behavior of typical elements by using a MTS 3-axis elastomer tester. A simple Bouc-Wen hysteretic differential model was modified to generate a more precise rubber bushing model. A sine wave, step input, and random excitations are imposed on the bushing. The ADAMS program is used to calculate sensitivity and the VisualDOC program is employed to find the optimal parameters for the bushing model. An error function is designed to find optimal parameters of the model. Parameter identification is carried out to satisfy the static and dynamic characteristics due to sine and step excitation inputs. It was proved that the proposed model could predict the bushing forces under sine, step, and random inputs well. The errors are within 10% in the overall range. To show the validity of the proposed model, a numerical example was also carried out. Because the bushing forces due to random excitation input show good agreement with experiments, the proposed bushing model is available in the vehicle dynamics simulation.