【作者】 崔晓鹏；

【导师】 杨志华；

【作者基本信息】 吉林大学 ， 工程硕士（专业学位）， 2017， 硕士

【摘要】 随着人们对汽车舒适性要求的提高,异响问题的控制显得尤为重要。由于汽车的内饰件处于车内的可见区域,因此内饰性能的优劣直接影响着驾驶人员对汽车质量的评价。所以内饰件除了要满足多种功能要求的同时,还要满足防止出现异响的要求。本课题以国内某自主品牌正向开发的SUV车门为研究对象,通过数模检查、异响的CAE分析和异响试验验证相结合的方式,提出了一套比较完整的汽车车门内饰异响控制方法。本课题的主要研究内容包括:(1)在前期设计阶段,针对3D数模开展了如下工作:首先,进行DMU数模检查,从3D数据中查找潜在的可能导致异响的设计缺陷,并且对每个设计缺陷提出改进建议,消除异响风险。然后,建立有限元分析模型,并进行理论模态分析及实验验证,证明模型的可靠性。最后,进行异响问题的CAE分析,包括子系统模态分析、车身的异响灵敏度分析(针对内饰安装点)和异响危险点分析。前两项的分析结果作为第三项的分析依据,由第三项分析给出存在异响风险点的位置,同时针对异响危险点提出对应的改进建议,并且分析改进后的效果。从静态到动态,从异响危险区域到异响危险点,综合各项分析结果,全面的分析预测可能发生异响的位置。(2)在后期样车调教阶段,进行多种道路及实验室内整车和零部件试验,从样车试验中,检查出现异响的系统和部位。首先,使用实车在试验场路面上进行异响主观评价,同时采集道路载荷谱。然后,利用载荷谱进行整车四立柱异响试验和子系统及零部件异响试验。在高温、低温、常温条件下进行异响主观评价并查找原因,得到的试验结果进一步验证了仿真模型的可靠性和改进方案的有效性。本课题的创新性在于:本课题针对某款车车门系统的异响问题进行研究,确立了控制异响问题的正向开发流程。通过前期CAE手段进行分析控制,主要解决结构设计及材料兼容性不合理引起的异响问题。通过后期实车试验查找异响危险点,主要解决由于零件制造及装配误差导致的异响问题,并且验证了CAE分析的结果。最终,结合前期和后期的控制方法,提出了一套比较完整的汽车车门内饰异响控制方法与流程。本课题使用的异响研究与控制流程也可以应用于其他子系统,具有一定的借鉴和指导意义。更多还原

【Abstract】 With the improvement of people’s comfort requirements,the control of squeak and rattle is very important.Because the interior parts of the car are visible in the car,therefore,the performance of the interior has a direct impact on the evaluation of the quality of the driver.Therefore,in addition to meeting the needs of a variety of functional requirements,but also meet the requirements to prevent the occurrence of squeak and rattle.In this paper,a domestic independent brand is being developed for the study of SUV door,through digital inspection with squeak and rattle,CAE analysis of squeak and rattle and combination of squeak and rattle experiment verification.This paper presents a set of methods to control the squeak and rattle of automobile door interiors.The main contents of this thesis include:(1)In the preliminary design stage,the following work has been done for 3D digital model: First,look for potential design flaws that can cause squeak and rattle from 3D data.And make recommendations for improvement of each design defect,to eliminate the risk of abnormal sound.Then,establishing finite element analysis model and theoretical modal analysis and experimental verification are carried out.Do the CAE analysis of the squeak and rattle problem.It consist of subsystem modal analysis,analysis of squeak and rattle sensitivity of car body and the analysis of squeak and rattle danger point.The results of the first two items are used as the basis for the analysis of the third items,the location of squeak and rattle points is given by third analysis.At the same time,this paper puts forward some suggestions for improvement of squeak and rattle danger points,and give analysis of the improved results.Combined with the analysis results,predicting the possible location of squeak and rattle.(2)In the later stage,do test of vehicle and parts in various road and laboratory,to check squeak and rattle system and parts.First of all,the subjective evaluation of squeak and rattle on the road surface is carried out.Then,the load spectrum is used to test the difference between the four columns of the vehicle and the squeak and rattle of the subsystems and components.Under the conditions of high temperature,low temperature and normal temperature,do the subjective evaluation of squeak and rattle.The innovation of this thesis lies in: in this paper,the problem of squeak and rattle of a car door system is studied,the forward development process of controlling squeak and rattle is established.Analysis and control by means of early CAE,Mainly solve the problem of squeak and rattle caused by unreasonable structure design and material compatibility.To find out the squeak and rattle point by the late real vehicle test,meanwhile the results of CAE analysis were verified by experiments.Finally,the combination of early and late control methods,this paper presents a set of methods to control the squeak and rattle of automobile door interiors.In this paper,the squeak and rattle the research and control flow can also be applied to other subsystems,and it has certain guiding significance.更多还原