基于ADAMS的汽车不等长双横臂式独立悬架设计及振动分析说明书.doc

PAGE I 目 录 TOC \o "1-3" \h \z \u 摘 要 II Abstract III 1 绪 论 1 1.1课题研究背景 1 1.2课题国内外研究现状 1 1.3不等长双横臂独立悬架的功能及结构特点 1 1.4 ADAMS软件简介及在汽车上的应用 2 1.5课题主要研究内容 3 2不等长双横臂独立悬架的设计 4 2.1不等长双横臂独立悬架的设计要求 4 2.2悬架主要参数的确定 4 2.3悬架弹簧设计 6 2.4悬架减振器设计 7 3基于ADAMS的汽车不等长双横臂式独立悬架的建模 11 3.1模型的简化 11 3.2几何模型建立 11 4基于ADAMS的不等长双横臂独立悬架振动仿真分析 19 4.1创建悬架系统 19 4.2施加约束 20 4.3不等长双横臂独立悬架振动仿真分析 21 5结论与展望 25 参考文献 2 6 致 谢 27 PAGE PAGE II 基于ADAMS的汽车不等长双横臂悬架设计及振动分析 摘 要 悬架做为汽车的重要组成部分之一，对于汽车的抗振特性起到至关重要的作用。由于装有独立悬架的汽车影响同侧车轮，在汽车前悬架中已经很少使用，所以，本课题研究独立悬架。在装有横臂悬架的汽车上，正常行驶时，单横臂悬架使轮距变化比不等长双横臂悬架作用在轮距上有更大变化，使汽车在行驶时增加了滑动的可能性。设计不等长双横臂悬架时要注意选择合适的上下臂的比值，以及减振器、螺旋弹簧的规格，这样能够使汽车发生滑动时由轮胎变形来解决此问题。双横臂由于其特点，已经广泛应用到汽车的前悬架中。特别对于越野车，面对更加复杂的路面，此悬架能够很好的使汽车有较好的稳定性。并且设计也灵活多变。本课题采用ADAMS/Car来创建模型，构建悬架系统，利用ADAMS/Car对悬架的上下横臂进行设计，选用螺旋弹簧匹配系统，保证轮胎上下跳动时，符合汽车的震动特性。并ADAMS/Car中设置测试平台进行仿真分析。通过悬架的振动分析，能够提高整车的减振特性。 关键词：不等长双横臂悬架；ADAMS；振动分析； PAGE PAGE III Unequal length double wishbone suspension design and car vibration analysis based on ADAMS Abstract Suspension is one of the important components of the car and plays a crucial role in the anti-vibration characteristics of the car. Because the car with independent suspension affects the same side wheel, it is rarely used in the front suspension of the car. Therefore, the subject researches the independent suspension. For an independent suspension, on a vehicle equipped with double wishbone suspensions and single wishbone suspensions, when the normal driving, the wheel change is greater than the unequal double wishbone suspension, so that the car is running Increased the possibility of slippage. When designing unequal double wishbone suspensions, care should be taken to select the appropriate upper and lower arm ratios, as well as the specifications of shock absorbers, coil springs, etc., so that this problem can be solved by tyre deformation when the car is sliding. Due to its characteristics, the double wishbone has been widely used in t