振动噪声(NVH)产品质量只有从一开始就考虑，才能顺利交付。Romax Spectrum为机电一体化动力传动系统NVH仿真提供了完整和有效的解决方案。
Romax Spectrum为工程洞察和优化提供快速、精确的频域分析，其先进的技术能力已在实际应用中得到验证。Romax Spectrum将高级功能与CAE产品系统的其它接口相结合，为NVH设计提供了一个“首次即正确”的CAE主导的解决方案。
R21新功能
The 2021 Romax release sees new features across the simulation portfolio, with a particular focus on enabling our customers to democratize advanced technologies and to work in more collaborative ways. The key new features in Romax Spectrum are:
- VI-grade NVH simulator export – automatically calculate and export accurate gearbox and electric powertrain noise and vibration predictions from Romax Spectrum for use in the VI-grade NVH simulator.
- Electric machine NVH workflow enhancements, including new visualisation tools, and better handling for skewed and eccentric rotors.
- Show velocity on housing in Acoustic Analysis – to see the local structural deformations at the same time as the acoustic results and use this to interpret the source of any directional noise.
- FE speed improvements – for a significant decrease in model preparation and solve times.
- Six degree-of-freedom tooth contact geometry model and multiple nodes for gear mounting – a more complex contact model for improved gearbox transmission error (GBTE) analysis. The 6D model allows users to choose to eliminate assumptions such as force and misalignment only acting in the theoretical plane of action, force and misalignment being fixed throughout the meshing cycle, no impact of system deflections on tooth contact positions.
- Improvements to Batch Running and Parametric Study, to enable even more wide-ranging optimisation and sensitivity studies.
- Import REXS files, a standardised file format for exchange of geared system CAE models.
准确性和可预见性
Romax Spectrum提供了动力传动系统完整的、参数化的全系统建模，结合了世界顶级的齿轮和轴承接触模型，为您提供所需的精度进行灵敏的NVH仿真。
- 验证分析预测动态齿轮激励
- 电驱动的工作环境没有发动机掩体噪声，因此需要更加仔细设计NVH性能
- 新的动力传动系统布局带来未知的NVH问题，因此需要一个CAE主导的方法来解决NVH问题
- 新的轻型、刚性底盘设计使结构噪声更重要
- 高转速导致更高的频率噪声，需要精确的建模和高效的解决方案
- 平衡NVH与效率的更高需求，需要多目标设计优化
CAE主导的设计
考虑在开发过程的早期通过NVH仿真进行设计，尽量减少NVH测试和样机制造。
- 系统振动响应 – 全系统频域振动响应仿真，您可快速获得结果，可更快地进行工程决策，更好地设计产品
- 辐射噪声 – 嵌入式声学解决方案为非专业人士自动计算复杂的系统仿真，以便查看您的设计是否达到了噪声目标。
集成式工作流程
Romax Nexus系列产品通过接口将工作流与著名的第三方CAE工具关联起来，其中包括:
- Altair:
- Optistruct用于FE和结构优化
- Flux用于电机激励计算
- NVH Director用于车辆NVH仿真
- MSC软件：
- Nastran用于FE建模
- Adams用于多体动力学仿真
- FFT Actran用于声学仿真
- ANSYS:
- Ansys用于FE建模
- Maxwell用于电机激励计算
- Brüel & Kjaer:
- Vehicle NVH Simulator用于声品质评估。
“Romax不仅向Lucid提供了这个高效的工具，他们还为我们提供了出色的技术和商业支持。我们从Romax学到了很多，他们一直在帮助我们实现目标——更加优秀的动力系统NVH性能。.”
Feature Highlight: Acoustic Analysis
Romax Spectrum Acoustic Analysis adds radiated noise capabilities to the vibration simulation and analysis provided by Romax Spectrum to give you a thorough understanding of NVH performance in electro-mechanical powertrains.
Based on renowned and trusted meshing and solver technology from Free Field Technologies, Romax Spectrum’s new Acoustic Analysis product option forms a complete end-to-end process which allows you to predict radiated noise quickly and simply, without any in-depth experience of acoustic simulation. In combination with Romax Spectrum’s vibration prediction and system dynamic analysis tools, you can identify and mitigate the root causes of radiated noise problems in a single software product.
Romax Dynamic Fusion
Automatic generation of multibody models that are optimised for the perfect balance of accuracy and simulation speed
Dynamic Fusion is your gateway to the world of multibody and multi-physics simulation. With its unique discretisation technology you can create multibody models from Romax Nexus models in just a few seconds, bringing multibody simulation earlier in the design process to run concurrently with your Romax Spectrum NVH analysis.
With translators available for MSC Adams, GT-Suite and Modelica-compliant tools you can easily incorporate your Nexus models into simulations for transient dynamics and drivability, systems engineering, control system design and many other applications.
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