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Company:

Products:

Adams

Industries:

Overview:
隐性机器人模型的概念是一个强大的工具,能够分析一些由视觉伺服团体所开发的控制器的内在特性。Adams 仿真在我们的隐性机器人模型的理论工作验证中起着重要作用。通过 Adams/Controls 将 Adams 与 Simulink 集成在一起,我们无需再编写复杂的方程式来预测并联机器人的动力学特性,同时可以获得图形化结果,让我们能够更加透彻地了解机器人的性能。

 
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Company:

Infosys

Products:

MSC Nastran

Industries:

Medical Devices

Overview:
采用MSC Nastran研究椎骨的力学性能,同时考虑到多种因素,例如形状、皮质骨/松质骨的密度分布、其它骨组织的材质特性及疏松度。
Challenge:
骨质疏松症的治疗不仅复杂、费力、昂贵,而且患者会面临副作用风险。现有的骨折风险诊断方法的不准确性意味着可能会有大量患者在骨折风险相当低的时候进行了此类治疗。医学专家需要更准确的确定骨折风险的方法,这些方法应将患者的个体特征考虑在内,以便评估潜在的效用和各种可用治疗方法的风险。
Solution:
Infosys 团队通过计算机辅助设计(CAD)和有限元分析(FEA)工具开发了一种研究椎骨机理的解决方案,同时可将多种因素考虑在内,例如形状、皮质骨/松质骨的密度分布以及其它骨组织的材质特性和疏松度。Infosys 开发的这种创新的解决方案采用了可靠的机械工程原理,以便了解人体椎骨的生物力学,并可缩小在估算骨折风险时的误差范围。该解决方案可帮助从业者以详细、非破坏性的方式来研究骨骼,并对椎骨的骨折风险进行量化分析。
Results Validation:
Infosys 开发出了这种创新的骨质疏松症诊断解决方案,它采用计算机辅助设计和有限元分析,可定量地评估椎骨的骨折风险。在确定骨折风险时,与传统的BMD 测量方法相比,通过仿真所计算出的应力可提供更加准确的评估结果。它运用机械工程最佳实践来了解椎骨的生物力学。Ketan Gaikwad 博士指出:“借助Infosys 提供的新型解决方案,医生们可以针对个体病例准确地确定由于骨质疏松症所致疼痛的病理生理学。这有助于我们为患者选择合适的治疗方案。”

 
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Company:

Various Companies

Products:

SC/Tetra

Industries:

Aerospace

Overview:

Commercial applications for drones are dramatically increasing and engineers are racing to maximize payload capacity. We simulated details of the airflow pattern around a common type of commercial drone in flight to determine the pressure distribution exerted on the aircraft, lift force generated, and the cargo capacity of the drone.


 
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Company:

Thales Angenieux

Products:

Adams

Industries:

Consumer Products

Overview:

The defining characteristic of a zoom lens is that its focal length can be varied. The focal length determines the angle of view — how much of the scene will be captured — and the magnification —how large individual elements will be. The shorter the focal length, the wider the angle of view and the lower the magnification. The advantage of zoom lenses over lenses with a fixed focal length is that you don’t have to change lenses to achieve a tighter or a wider composition. Most zoom lenses, particularly those designed for consumer and professional photographers, lose focus when the focal length is changed. But high-end zoom lenses, especially those designed for producing films or television, can be zoomed in and out without losing focus. This type of lens is called a parfocal lens. The first parfocal lens capable of zooming in an out while maintaining precise focus to a degree acceptable for demanding cinema production was designed and built by Pierre Angénieux in 1956, a feat for which he received an Academy award for technical excellence. Parfocal zoom lenses are very difficult to design and build. Zoom lenses generally consist of three different groups; two of them are moving together (to change focal length) and the last one independently (to focus) and one stationary group of lenses with each group comprising two of more lens elements.

Results Validation:

With the new method proven, Ayad simulated all of the company’s zoom lenses and found the worst-case position for each lens. Now inspectors are able to inspect the tilt simply by moving the lens to this position and making the measurements. The net result is that the time needed to inspect each lens has been reduced.

Benefits:
  • Inspection time has been reduced
  • Less experienced operators can perform the inspection
  • Adams simulation accurately predict worst case position

 
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Company:

Various Companies

Products:

SC/Tetra

Industries:

Shipbuilding

Overview:
  • Wind Resistance on a Sea Carrier Transporting Wood Chips
  • Tank Test Simulation of Blunt Ship (Towing Condition)
  • Tank Test Simulation of Blunt Ship (Self-Propulsion Condition)
  • Estimation of Marine Propeller Performance in Open Water
  • Predicting Marine Propeller Cavitation
  • Using SC/Tetra to Estimate Ship Hull Pressure Fluctuation
  • Evaluation of Small Cruising Vessel Posture using a Free Surface Analysis
  • Predicting the Proportion of Discharged Air from an Aeration Tank
  • Evaluation of Marine Diesel Engine Coolness
  • Assessing the Capability of Water Lens Turbine for Tidal Power Generation

 
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Company:

Nagasaki University

Products:

SC/Tetra

Industries:

Machinery

Overview:

Evaluate the influence of aerodynamic noise and rotating stall by comparing the internal flows between different geometries of scirocco fans using SC/Tetra


 
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Company:

Osaka-Electro-Communication University

Products:

SC/Tetra

Industries:

Machinery

Overview:

The internal flow of the impeller end captured by SC/Tetra


 
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Company:

Teral Inc. and Teral Kurita Inc.

Products:

SC/Tetra

Industries:

Machinery

Overview:

SC/Tetra for more efficient fan product development


 
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Company:

Navistar & Tech Mahindra

Products:

Adams

Industries:

Automotive

Overview:

It takes a 450 horsepower truck with an 80,000 lb. load roughly 90 seconds to accelerate to 50 mph but the brakes must be able to stop the truck in less than 5 seconds. Air brakes are used almost exclusively in heavy-duty trucks and trailers because they offer the following advantages. First, the air they run on is free. It only needs to be compressed, cleaned, stored and distributed. The air brake circuit can be easily expanded so trailers can be coupled and uncoupled from it. Besides providing the energy required to stop the vehicle, compressed air also signals when and with how much force the brakes should be applied in any situation. Finally, air brakes can be designed with sufficient fail-safe devices to bring the vehicle safely to a stop, even in the event of an air leak. Reinforced rubber hoses deliver air from fittings on the frame to brake chambers on the axles. In a typical tandem rear suspension there are typically 8 brake hoses plus additional hoses for the power differential lock and other features for a total of 11. The hoses must be routed through a tight space and accommodate the full range of steering gear and suspension travel. The hoses are required to avoid contact with components with sharp edges that might wear the hoses, maintain a specified minimum bend radius to avoid constricting flow within the hose, and avoid axial forces high enough to pull out the hose out of the fitting.

Results Validation:

“Simulation makes it possible to try many different positions, orientations, and clipping options early in the design phase prior to the availability of a prototype,” said Stefano Cassara, Manager Vehicle Dynamics Simulation for Navistar. “New design iterations can be evaluated in a small fraction of the time required for physical testing. The new approach makes it possible to design new hose configurations in only about two weeks. Since the design process will be carried out early and outside the critical path we should be able to bring new vehicles to market six weeks faster than in the past. Another advantage of the new approach is that we can model loading scenarios, such as braking, that cannot be duplicated on the test rig.”

Benefits:
  • Simulation of hose routing helps reduce time to market by six weeks
  • Adams predictions perfectly matched test results in each steering position
  • Simulation provides a much better understanding of how to route the braking hoses to avoid contact with components with sharp edges that might wear the hoses in response to suspension and steering movement
  • New Adams FE Part provided a fast and accurate way to predict the large deformation of brake hoses in Adams environment

 
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Company:

Teral Inc.

Products:

SC/Tetra

Industries:

Machinery

Overview:

SC/Tetra contributes to more efficient development process


 
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Company:

KTM (KITAMURA Valves)

Products:

SC/Tetra

Industries:

Machinery

Overview:

Understanding flow characteristics of a valve using SC/Tetra


 
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Company:

Products:

Actran Acoustics
Actran AeroAcoustics
Actran DGM
Actran for Trimmed Body
Actran TM
Actran VI
Actran VibroAcoustics
Adams

Industries:

Machinery

Overview:
减少设计优质产品所需的开发时间和所耗资源,一直是一个重大的产业挑战。不同CAE技术的集成让我们朝这个目标向前迈进了一步。本文将讨论Adams与Actran,MSC软件公司的MBD与声学解决方案,如何组合并集成在一起,使MBD工程师在设计流程的早期洞察运动机构的声学行为具备可能。此外,声学工程师还可以从声学结果的进一步后处理中得到更多有价值的信息。
Challenge:
一般来说,预测出自诸如传输系统或变速箱这样的运动系统的噪声是很难的。如果没有准确地预测系统动态如何影响其噪声性能的能力,工程师们就没有一个有效的方法来重新设计他们的系统,以提高声学性能。传统的工作流程涉及三个界面,多体动力学(MBD)工具,有限元分析(FEA)工具和声学软件。首先,工程师将需要在MBD工具里执行动力学分析以获取齿轮壳表面的动态载荷,因为时域结果通常不能被声学软件直接读取,他们需要在频域下转换成完全的结构响应,然后,他们将可以最终把表面振动读取到声学软件中,并用它作为边界条件。这个工作流程是相当费力的,每次有设计变更时都可能需要多个CAE工程师一起合作。 MSC软件公司最近已经开发了一种新的方法,允许工程师在ADAMS界面进行建模,并在没有手动导出结果到声学软件进行噪声分析的情况下获取声学行为的初步结果和印象。这种新工作流程大大减少了对诸如变速箱这样的运动机构进行声学分析的时间和成本,与传统方法相比,新方法使工程师对新系统的设计在同样的时间里能做更多的迭代。
Solution:
让我们考虑一个变速箱的例子:齿轮运动引起变速箱的振动,这种振动又会影响齿轮的物理行为从而引发强耦合问题。振动的变速箱也会将能量转换到周边流体以及将能量转换成由其辐射的声波。同时,声波也会影响结构振动。然而,如果一方面多体动力学和结构仿真领域通常是强耦合的,并可以同时被求解,而另一方面,当考虑发生在空气中的声辐射时,从声波到结构的反馈又会被忽略。要评估的声学响应,我们可以考虑在变速箱周围分布一些麦克风。在Adams模型中,变速箱外壳被考虑成弹性体以捕捉其表面响应。变速箱的剩余部分(如齿轮、轴、轴承等)是刚性部件。建立Adams模型后,执行一个5s 动力学分析, 输入轴的转速从0到3000rpms 加大。从分析中,我们得到了每个组件的负载和接触力输出,以及每个系统部件的位移,速度和加速度输出。以下MBD仿真,仍然在ADAMS环境中进行,声学工具启动以建立诸如声学网格、无限元半径、声速、流体密度、输出格式、声环境(材料)等的声学分析参数。这个工具所做的事情,就是将MBD结果转换成的声学模型所需的边界条件,并在后台使用新的Actran时域求解器执行声学分析。在Adams环境中进行声学仿真时,你可以到MBD后处理器中得到这个变速箱壳体的一些声学结果,比如每个麦克风位置围绕麦克风的时域下的声压演化以及声音文件(.WAV)。
Results Validation:
CAE技术集成的先进性使开发时间和所耗资源减少。本文通过说明如何集成Adams和Actran提高CAE工程师的工作流程效率,提供了一个展示这些好处的例子。具体而言,将多体动力学和声学时域分析集成到Adams环境,使MBD工程师进行产品的初步声学性能评价。得益于音频文件的生成,这些评价同时包括了噪声质量的考察。最后,只有在最相关的案例中,才需要由声学工程师在Actran环境中执行高级的后处理。
Benefits:
CAE技术集成的先进性使开发时间和所耗资源减少。本文通过说明如何集成Adams和Actran提高CAE工程师的工作流程效率,提供了一个展示这些好处的例子。具体而言,将多体动力学和声学时域分析集成到Adams环境,使MBD工程师进行产品的初步声学性能评价。得益于音频文件的生成,这些评价同时包括了噪声质量的考察。最后,只有在最相关的案例中,才需要由声学工程师在Actran环境中执行高级的后处理。

 
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Company:

Aomori Prefectural Industrial Technology research Center

Products:

HeatDesigner

Industries:

Electronics

Overview:

The Hachinohe Industrial Institute is one of the affiliated laboratories of the Aomori Prefectural Industrial Technology Research Center (hereafter the Research Center). A Prefecture is an administrative district. Japan consists of 47 prefectures. The Research Center uses HeatDesigner to help solve thermal problems for electronics. The range of applications includes scanners for food contaminants, devices for measuring the quantity of sugar and moisture in agricultural products, and inspection devices for assessing moisture and heat in coal and biomass.


 
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Company:

DOME CO., LTD.

Products:

SC/Tetra

Industries:

Automotive

Overview:

Visual Basic (VB) Interface automates the evaluation of alternative vehicle height configurations


 
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Company:

Hitachi Mito Engineering Co. Ltd.

Products:

HeatDesigner

Industries:

Consumer Products

Overview:

Hitachi Mito Engineering provides engineering support for the development of elevators and various industrial products. To minimize tasks and improve process efficiency during the early phases of development, they conduct simulations for thermal design processes using analysis tools developed by Software Cradle. Hitachi Mito Engineering has been a very successful company. This narrated interview will provide insight about how they achieve steady growth while incorporating the latest technology and consistently building on their accumulated experiences.


 
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