• Noise, Vibration, and Harshness (NVH) is the English abbreviation for Noise, Vibration, and Harshness. This is a comprehensive issue in measuring automotive manufacturing quality, and it gives car users the most direct and superficial perception. Vehicle NVH issues are one of the concerns of major vehicle manufacturers and component companies in the international automotive industry. According to statistics, about one-third of vehicle failure problems are related to vehicle NVH issues, and major companies spend nearly 20% of their R&D expenses on solving vehicle NVH problems. NVH issues are systematic. For example, some cars have loud cabin noise while driving, and the source is traced to the engine. Then this noise problem may involve three parts: one is the loud noise of the engine itself, one is the poor vibration damping effect of the engine mounting components, and one is the poor sound insulation technology of the cabin front wall and floor. It is an interrelated system problem.
• 噪声、振动与声振粗糙度（Noise、Vibration、Harshness）的英文缩写。这是衡量汽车制造质量的一个综合性问题， 它给汽车用户的感受是最直接和最表面的。车辆的NVH问题是国际汽车业各大整车制造企业和零部件企业关注的问题之 一。有统计资料显示，整车约有1/3的故障问题是和车辆的NVH问题有关系，而各大公司有近20%的研发费用消耗在解决 车辆的NVH问题上。NVH问题是系统性的。例如有些轿车行驶时车厢噪声大，查源头在发动机，那么这一个噪声问题可能 就涉及到三个部分，一个是发动本身的噪声大，一个是发动机悬置部件减振效果差，一个是车厢前围和地板隔音技术不 好，是一个互相关连的系统问题。

• In engineering practice, the integrated application of finite element analysis software and CAD systems has brought about a qualitative leap in design capability, mainly manifested in the following aspects: increasing design functionality and reducing design costs; shortening the cycle of design and analysis; increasing the reliability of products and engineering; adopting optimization design to reduce material consumption or cost; discovering potential problems in advance before product manufacturing or engineering construction; and simulating various test schemes to reduce test time and expenses.
• 在工程实践中，有限元分析软件与CAD系统的集成应用使设计水平发生了质的飞跃，主要表现在以下几个方面：增加设计功能，减少设计成本；缩短设计和分析的循环周期；增加产品和工程的可靠性；采用优化设计，降低材料的消耗或成本；在产品制造或工程施工前预先发现潜在的问题；模拟各种试验方案，减少试验时间和经费。

• Composite materials are new types of materials formed by combining several different types of materials, such as organic polymers, inorganic non-metals, or metals, through composite processes. They can retain the main characteristics of the original component materials while obtaining properties that the original components do not possess through composite effects. Through material design, the properties of each component can be made to complement each other and be interrelated, thereby obtaining new superior properties, which is essentially different from the simple mixing of general materials.
• 复合材料是由有机高分子、无机非金属或金属等几类不同材料通过复合工艺组合而成的新型材料，它既能保留原组分材料 的主要特色，又通过复合效应获得原组分所不具备的性能。可以通过材料设计使各组分的性能互相补充并彼此关联，从而获 得新的优越性能，与一般材料的简单混合有本质的区别。

• “The process of permanent cumulative damage occurring at one or several locations, followed by crack initiation after a certain number of cycles or sudden complete fracture.” Fatigue life is defined as the number of load cycles at which fatigue failure occurs, or the time elapsed from the beginning of loading to the occurrence of fracture. That is, the number of cycles of specified stress or strain experienced by a material or component when fatigue failure occurs. It is a topic of great concern to designers and engineering technicians, and also an issue closely related to the vital interests of a large number of users.
• “在一处或几处产生永久性累积损伤”经一定循环次数后产生裂纹或突然发生完全断裂的过程。 疲劳寿命的定义为发生疲劳破坏时的载荷循环次数，或从开始受载到发生断裂所经过的时间。即材料或构件疲劳失效时所经受的规定 应力或应变的循环次数，是设计人员和工程技术人员十分关注的课题，也是与广大用户切身相关的问题。

• 分析软件可以进行多种功能分析，其解决问题的范围从简单的线性分析到复杂的非线性分析都可胜任，软件包含丰富的单 元库，可以模拟任意几何形状的单元库和材料性能，结构分析是其重要组成部分，这就决定FEA的操作界面不同于结构 设计软件。结构设计软件的功能目标很明确，就是为了给结构工程师提供施工图终端服务的，各种界面设置都是围绕工程师 关心的事情出现的，再配合“傻瓜式”的服务理念，大部分的功能都集成化，也符合结构工程师的思维模式，因此结构设计软 件的应用非常直接而广泛。

• 不同的结构设计软件可能在界面上有差异，但菜单设计是按照结构工程师的设计思路排序的，有 经验的工程师可以不经过训练就可以通过软件操作进行施工图没计。

CAE simulation moves product validation forward to the digital prototype stage, reducing physical prototypes and tests by over 50% and significantly shortening R&D cycles. It captures full-field stress distributions that physical testing cannot obtain, and supports coupled multiphysics simulation of structural, thermal, and fluid fields to faithfully reproduce extreme operating conditions. More importantly, CAE drives topology optimization and parameter optimization, guiding innovative structural design and achieving the optimal balance between performance and cost. It is the core technology engine for enterprises to move from “trial-and-error validation” to “forward design.”

CAE仿真将产品验证前置到数字样机阶段，减少物理样机与试验次数50%以上，显著缩短研发周期。它能捕捉物理测试无法获取的全域应力场，支持力、热、流多物理场耦合模拟，真实复现极限工况。更重要的是，CAE驱动拓扑优化与参数寻优，引导结构创新设计，实现性能与成本的最优平衡。它是企业从“试错验证”迈向“正向设计”的核心技术引擎。

• Focusing on the front end of product design, precision planning and virtual validation are carried out simultaneously based on 3DCC 3D dimensional chain calculation and tolerance analysis software. It supports direct reading of original files from mainstream CAD platforms such as CATIA and UG, with automatic recognition of PMI information and mapping to the simulation environment, eliminating repetitive modeling steps.

  Core calculations are based on the Monte Carlo algorithm. Through tens of thousands of virtual assembly iterations, it simulates dimensional variation patterns under actual working conditions, with simulation accuracy consistently above 95%. The built-in AI intelligent annotation module can automatically generate key tolerance recommendations, and deep learning algorithms automatically construct assembly constraints based on model features, significantly reducing human trial-and-error costs. The software supports dual-track parallel operation of virtual point modeling and MBD, flexibly adapting to rapid validation needs in the early concept stage of products.

  Analysis outputs include contribution ranking, tolerance zone distribution charts, and CPK achievement rate assessment, supplemented by dual verification using the extreme value method and statistical method. Designers can use these to precisely locate tolerance-sensitive links and relax non-critical tolerances while ensuring assembly function, achieving the optimal balance between quality and cost.

• 聚焦产品设计前端，基于3DCC三维尺寸链计算及公差分析软件，同步开展精度规划与虚拟验证。支持与CATIA、UG等主流CAD平台的原文件直读，PMI信息自动识别并映射至仿真环境，省去重复建模环节。
• 核心计算基于蒙特卡洛算法，通过数万次虚拟装配迭代，模拟实际工况下的尺寸波动规律，仿真准确度稳定在95%以上。内置的AI智能标注模块可自动生成关键公差建议，深度学习算法根据模型特征自动构建装配约束，显著降低人为试错成本。软件支持虚拟点建模与MBD双轨并行，灵活适配产品早期概念阶段的快速验证需求。
• 分析输出包含贡献度排序、公差带分布图及CPK达成率评估，辅以极值法与统计法双重校验。设计人员可据此精准定位公差敏感环节，在保证装配功能的前提下放宽非关键公差，实现质量与成本的最优平衡。

• Focusing on automotive parts, we use 3D software such as CATIA and UG/NX to complete the full-process design from concept ideation to structural validation. The design strictly follows the IATF 16949 quality management system, and high-precision 3D digital models are built through parametric modeling to ensure the structural strength and dimensional tolerances of parts under extreme operating conditions.

  We adopt topology optimization technology to achieve lightweight design, reducing self-weight while ensuring stiffness; combined with finite element analysis (FEA), we simulate vibration, thermal load, and fatigue life to optimize stress concentration areas. The design integrates the DFM (Design for Manufacturing) concept, taking into account casting processability and machining feasibility, and generates standard-compliant 2D engineering drawings.

  Deliverables include STEP-format universal 3D models, DWG 2D drawings, and BOM bills of materials. The final design, while meeting stringent automotive regulatory requirements, achieves a balance among reliability, economy, and assembly convenience, providing precise data support for subsequent prototype trial production and mass production.

• 聚焦于汽车配件，运用CATIA与UG/NX等3D软件完成从概念构思到结构验证的全流程设计。设计严格遵循IATF 16949质量管理体系，通过参数化建模构建高精度三维数模，确保配件在极限工况下的结构强度与尺寸公差。
• 我们采用拓扑优化技术实现轻量化，在保证刚度的同时降低自重；结合有限元分析（FEA） 模拟振动、热负荷与疲劳寿命，优化应力集中区域。设计集成DFM（可制造性设计） 理念，兼顾铸造工艺性与加工可行性，并生成符合标准的二维工程图。
• 交付成果包括STEP格式通用3D模型、DWG二维图纸及BOM物料清单。最终设计在满足严苛车规要求的基础上，达成可靠性、经济性与装配便利性的平衡，为后续原型试制与量产提供精准的数据支撑。