• The study of NVH characteristics is not only applicable to the development process of entire new automotive products, but also to research on improving the ride comfort of existing vehicle models. This is a modeling and analysis effort targeting a specific system or assembly of an automobile to identify the factors that have the greatest impact on ride comfort. By improving the vibration condition of the excitation source (reducing amplitude or shifting frequency) or controlling the transmission of vibration and noise from the excitation source into the cabin, ride comfort is improved.
• NVH特性的研究不仅仅适用于整个汽车新产品的开发过程，而且适用于改进现有车型乘坐舒适性的研究。这是一 项针对汽车的某一个系统或总成进行建模分析，找出对乘坐舒适性影响最大的因素，通过改善激励源振动状况(降 幅或移频)或控制激励源振动噪声向车室内的传递来提高乘坐舒适性

• For an automotive exhaust system, it usually consists of two parts: the hot end and the cold end. The hot end mainly consists of the turbocharger, manifold, and catalytic converter; the cold end mainly consists of the muffler, exhaust pipe, and some hangers, support suspensions, etc. The hot end is closely connected to the engine, and its temperature can usually reach around 850°C. Temperature has a great impact on the mechanical properties of materials. Therefore, the influence of temperature on the vibration durability performance of the hot end of an automotive exhaust pipe cannot be ignored.
• 对于汽车排气系统而言，通常由两部分组成：热端与冷端。其中热端主要由涡轮增压器、歧管以及三元催化 器等组成；冷端主要由消音器、排气管以及一些吊钩、支撑悬挂等组成。热端部分紧连着发动机，其温度通常 都能达到850。C左右，温度对于材料的力学性能会产生很大影响，因此温度对于汽车排气管热端的振动耐久性 能的影响不可忽略。

• As a very important component in escalator drive components, the integral sprocket has a close impact on escalator safety and durability. Using nonlinear analysis of multibody dynamics and static calculation methods to analyze the mechanism operation process, based on structural symmetry, each time the sprocket rotates 60°, the same stress condition occurs. The sprocket rotates from position 1 through 60° to position 2. We take these two typical positions to conduct static stress analysis on the sprocket.
• 整体式链轮作为扶梯驱动部件中非常重要的部件，对扶梯安全性，耐久性影响紧密。运用多体动力学的非线性分 析，及静力学的计算方式分析，在机构运转过程中，基于结构对称，链轮每转过60°，出现一次相同的受力状况，链轮由位置1转动 60°到达位置2，我们取这两种典型位置对链轮进行静态受力分析。

• In blade design, wind aerodynamic calculations and structural mechanical calculations must be carried out. The blade shape is determined through aerodynamic design, and its dimensions are relatively complex, with high requirements for its dimensions, surface finish, and mass distribution. The structural form of the blade is determined through structural mechanical calculations, with common forms being hollow thin-walled structures with reinforcing ribs and thin-walled foam sandwich structures. A reasonable structure must be determined to prevent instability or local deformation when subjected to centrifugal force, bending moment, and torque loads.
• 叶片设计中要进行风力空气动力学计算和结构力学计算。叶片的外形是通过空气动力学设计确定的，尺寸较复杂，而且其尺 寸、表面光洁度以及质量分布等都有较高要求。叶片的结构形式是通过结构力学计算确定的，常见形式为设有加强筋的空腹薄 壁和薄壁泡沫塑料夹芯结构。确定合理的结构，以防止在受载离心力、弯矩和扭矩时失稳或局部变形。

• C-NCAP crash testing includes the frontal 100% overlap rigid barrier crash test, the frontal 40% overlap deformable barrier crash test, and the deformable moving barrier side crash test. Through the scores of these crash tests, and then adding them together for a total score, the crash star rating is determined.
• C-NCAP碰撞测试包括 正面100%重叠刚性壁障碰撞试验、正面40%重叠可变形壁障碰撞试验、可变形移动壁障 侧面碰撞试验。通过这几项碰撞测试的得分，再加在一起总的分数，来给定出碰撞星级。

• In domestic research in the field of body structure fatigue, based on the establishment of mechanical and mathematical models for vehicle cab fatigue strength calculation, a research method for vehicle cab fatigue strength was proposed. On the basis of analysis, structural optimization design methods were adopted to optimize the structure, reasonably select materials, etc., to improve the static mechanical performance and dynamic fatigue life of the body-in-white structure.
• 在车身结构疲劳领域的国内研究中，在建立了车辆驾驶室疲劳强度计算的力学和数学模型基础上，提出了车辆驾驶室疲 劳强度研究方法。在分析的基础上采用结构优化设计的方法优化结构、合理选择材料等，提高白车身结构的静态力学性能 与动态疲劳寿命。

• The design variables involve 58 parameters, including structural beam position, angle, cross-sectional dimensions, plate thickness, and material, to satisfy multiple design objectives including body-in-white stiffness, modal characteristics, 100% rigid wall crash, 40% offset crash, and side impact. Through analysis, body-in-white design parameters that have a relatively large impact on various performances can be identified, and at the same time, the possible variation trends of various performance indicators with engineering changes can be discovered, which is very important for making correct decisions on engineering issues in the later stage of the project. At the same time, it is possible to understand the maximum weight reduction potential of the body-in-white while satisfying various design objectives, as well as the maximum product design potential while maintaining design cost, and to conduct trade-off analysis among multiple objective values to gain a comprehensive and in-depth understanding of the design space.
• 设计变量涉及了结构梁位置、角度、截面尺寸、板厚、材料等58个参数，以满足包括白车身刚度、模态、100%刚性墙碰 撞、40%偏置碰撞、侧撞等在内的多个设计目标。通过分析可以找出对各项性能有较大的影响的白车身设计参数，同时发现各性能指标随工程更改可能出现的变化趋势，这对项目后期针对工程问题做出正确的决定非常重要。同时了解白车身满足各设计目标的最大减重可能以及保持设计成本时的最大产品设计潜能，并可以在多个目标值之间进行权衡分析，以对设计空间进行全面深入的了解

虚拟样机技术是当今先进的机械设计、分析理念和发展方向，随着计算机硬件和软件技术的不断发展，以多体系统动力学为核心的 虚拟样机动态仿真技术逐步应用到飞机设计中。在某型飞机的登机门设计中，由于采用门梯合一设计，门部件间的运动关系十分复杂 ，因此机门能否有效开启和关闭是机门设计中的主要设计因素。本文采用多体动力学软件MotionView搭建该登机门多虚拟样机模型， 得到相关的力和力矩，为登机门设计参数的优化以及后期的疲劳和强度提供参考依据。

植入到人体内部的人造髋关节，膝盖，脊椎骨，以及其它骨骼部件都面临着巨大的挑战，这其中包括诸如更多人造骨骼的材料 特性，人体生理学，外科手术过程和人造骨骼的制造工艺等方面的问题。利用CAE分析，来避免行业风险，提高认识，加快在医药 行业的发展。