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Company:

Scania

Products:

Adams

Industries:

Automotive

Overview:

Scania transmission components are developed as part of Scania’s integrated powertrain with a perfectly matched specification for each individual demand. The gearboxes are designed to suit the high-torque Scania engine range. The multitude of drive axle and bogie options provide optimum strength without inducing a weight penalty. Integrated powertrains are offered to customers on a modular basis in which nearly any gearbox can be combined with nearly any engine.

Challenge:

The traditional approach to the design of gearbox and powertrain components involves creating an initial design based on one-dimension powertrain models and engineering calculations and then building and testing a prototype. With this approach, undesirable properties are identified during physical testing at a late stage in the design process when changes are expensive. Another concern was that the cost involved in building and testing different gearbox-engine combinations can be very high, especially if prototypes have to be rebuilt and retested because the design did not match what was intended the first time.

Solution:

Scania has addressed this challenge by making extensive use of MSC Software’s Adams multibody simulation (MBS) 3D powertrain models that accurately predict transmission dynamic behavior. Scania powertrains are now developed in a virtual environment in which a large number – often thousands – of design alternatives are simulated and evaluated as software prototypes. Simulation predicts the performance of design alternatives prior to committing to the time and cost involved in building and testing physical prototypes.

Results Validation:

Simulation enables Scania engineers to quickly evaluate functional virtual prototypes of power transmission assemblies and components. Working in the MSC Software Adams simulation environment, Scania engineers can exercise powertrain designs under a wide range of conditions using the same tests they normally perform in a test lab but in a fraction of the time. Modifications are validated in the virtual world, which saves a significant amount of time and money in the design process. In some cases engineers have solved quality issues 30 percent to 40 percent faster when running simulation and measurements in parallel due to better understanding of the product.

Benefits:
  • Quickly model and evaluate power transmission assemblies and components
  • Excellent correlation between simulation and measurements in NVH and gear rattle
  • Solved quality issues 30 percent to 40 percent faster than using physical test alone

 
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Company:

CNRS-LAM, France

Products:

Marc

Industries:

Aerospace

Overview:

Astronomical telescopes and instruments enable astronomers to see into deep space and unravel the mysteries of the universe. Freeform mirror surfaces – surfaces with a shape more complex than a symmetrical conventional mirror surface (as for example, sphere, parabola, hyperbola, etc.) - offer substantial benefits by providing additional degrees of freedom that make it possible to improve the optical performances of the instrument, reducing the overall instrument mass and size.

Challenge:

The hydroforming process is difficult to design and optimize because the mirror undergoes plastic deformation to provide a freeform optical surface. While the elastic behavior of materials is well known and frequently modeled in optical manufacturing, the analysis of materials under stress in the plastic domain is much more difficult because it involves both material and geometric nonlinearities. One particular importance is the quantifying of the springback effect, in order to control the final shape of the mirror.

Benefits:
  • Reduction of time and cost of physical testing
  • Ability to produce a higher quality mirror surface
  • Accurate modeling of material and geometric nonlinearities

 
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Company:

VTT Technical Research Centre of Finland

Products:

Actran

Industries:

Machinery
Noise Pollution
Shipbuilding

Overview:
A night time noise complaint was issued from the residential area near one of Wärtsilä’s main large 4-stroke medium speed engine factories located in downtown Vaasa. This factory produces the Wärtsilä 32 ship engine which provides higher unit power, enhanced fuel consumption, significantly reduced componentry and integral computer control to a fiercely competitive sector of the engine business. The Wärtsilä facility produces about 500 engines per year and every engine is subjected to a test run. An investigation found that the likely source of the intolerable noise was from the exhaust from a W6L32E engine 1000 hour endurance test which was running continuously at 750 rpm and full load.
Challenge:
An environmental noise study was conducted in the middle of the night when the test engine was running, with measurements taken at three locations between the test facility and the nearby residential area. Sound pressure level measurements indicated a peak in the sound spectrum at the 100 Hz 1/3 octave band at approximately 94 Hz in narrowband, which corresponds to the crankshaft rotation frequency (CRF) order of 7.5. Typically the exhaust noise of the W6L32E engine should have the highest peaks at CRF orders 3 and 4.5. The measured noise was found to be well under the nighttime environmental noise limit. The annoyance levels were presumed to be high because of the dominant half order modulated low frequency noise components.
Benefits:
  • Accurate vibro-acoustic modeling of exhaust gas pipe system
  • Reduction of environmental sound levels with minimal physical testing

 
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Company:

4Subsea AS

Products:

Marc

Industries:

Energy

Overview:
Subsea drilling is conducted through a string of steel pipe called a rigid riser that runs from the oil rig to the blowout preventer (BOP). The primary purpose of the BOP is to cut off the flow of oil in the event of an emergency during drilling. The BOP may be connected to the subsea well directly, which consists of a string of vertical pipe running into the seabed down to the reservoir. The part of the well above (2-5 m) the seabed is called the wellhead system. This is the interface to the equipment to be connected to the subsea well. Alternatively, the BOP may be connected to a valve tree, which in turn is connected to the subsea well. The valve tree is used to control the flow of oil, and is usually called a Christmas tree.
Challenge:
The traditional approach to estimate fatigue life for underwater applications is based on the nominal stress at a given location. The calculated stress is related to test results through S-N curves, which give a required amount of stress cycles to cause fatigue failure. The results from a fatigue test are plotted as stress (S) versus number of cycles to failure (N), which gives the S-N curve. However, fatigue testing is expensive and time consuming so it is usually possible only in certain cases.
Benefits:
  • Greater understanding of crack growth
  • More accurate prediction on part life-cycle
  • Increased uptime of drilling rig

 
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Company:

AVEVA

Products:

MSC Nastran

Industries:

Shipbuilding

Overview:
AVEVA是海洋产业工程和设计软件的世界领导者,并且拥有与MSC共同的客户,因此我们两个解决方案之间提供了一个新的接口,无论是对于MSC、AVEVA、还是众多的造船企业及他们的设计单位来讲都是一个好消息。我们采访了AVEVA海洋系统的业务主管Stéphane Neuvéglise,以更加了解新产品的意义及重要性。
 
 
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Company:

Simpleware

Products:

Marc

Industries:

Medical Devices

Overview:
关节置换(人工关节)已成为一种较为常见的产品。随着人口老龄化的发展,人的寿命已经超过了天然关节的寿命。虽然现在正在接受治疗的关节也越来越多,如肩,肘,踝关节,但这些经常用到人工关节的地方是髋关节和膝关节。不管关节的位置如何,该过程通常涉及病人病变或受损的关节的移除,取而代之的是将金属、塑料或陶瓷轴承表面连接到一个固定在周围骨上的金属支撑结构。
 
 
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Company:

Products:

Dytran

Industries:

Medical Devices

Overview:
当眼睛受到撞击的时候视网膜的脱落或者撕裂是常见的现象。这个研究的目的是为了了解当人的眼睛受到钝器冲击时的动态变形过程及影响。这个项目的有限元模型是从真实的人眼三维模型测量中得到的。应用了MSC公司的Dytran作为仿真分析工具。对于不同时刻的变形以及弹丸的剩余速度,进行了仿真结果与实际测试结果的比较。
 
 
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Company:

Compumod

Products:

Marc

Industries:

Consumer Products

Overview:
Compumod很高兴地宣布有限元模拟已被Perth Mint用于铸造打破记录的一吨金币的设计与规划当中。这个纯度为99.99%的一吨金币宽为80cm,厚度超过12cm。铸造之前,Compumod与Perth Mint定下合同来创建浇灌的计算机模拟,以此来实现评估Compumod和夹具的完整性,从而确保硬币的尺寸不会受影响。
 
 
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Company:

BL Advanced Ground Support Systems

Products:

Adams

Industries:

Automotive

Overview:
BL Advanced Ground SupportSystems(BL)是专业设计开发战斗机和陆军特种车辆的公司。过去,公司由于依赖外部资源做仿真研究,大量时间浪费在沟通和等待仿真结果上。建立内部的CAE能力,包括使用Adams和Simxpert进行多体系统动力学和多学科仿真分析,成为公司提高设计能力的关键。
 
 
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Company:

NASA喷气推进实验室

Products:

Adams

Industries:

Aerospace

Overview:
火星科学实验室是一项机器人空间探测任务,于2012年8月5日实现了火星探测车好奇号在火星上的盖尔火山口(GaleCrater)成功着陆。空中起重机的着陆顺序要求探测车在下降时从收起的飞行形态转为着陆形态,从下降段开始放下车轮。在最后的进入、下降及空中起重机着陆阶段,由于其复杂性以及无法从地球上进行人工干预,因此被NASA的工程师们称作“惊险7分钟”。
 
 
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Company:

通用动力陆地系统公司

Products:

Adams

Industries:

Automotive

Overview:
战斗车辆上的炮塔驱动装置面临一个非常复杂的设计上的挑战。当车辆行驶在崎岖地形时,炮塔驱动装置对车辆进行运动补给,保持以99.5%的精确度瞄准目标。在过去,通用动力陆地系统公司(GDLS)工程师使用单独的仿真技术评估炮塔驱动设计的不同方面,例如刚性体结构、柔性体和控制系统。但这样工程师不能在建立和测试样机之前把炮塔驱动装置作为一个整体系统来评估。
 
 
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Company:

ITW Delfast集团

Products:

Industries:

Machinery

Overview:
ITW Delfast集团为汽车行业设计和生产工程用塑料和金属紧固件。典型的塑料紧固件通过插拔式卡扣起到固定作用。由于紧固件存在多个接触体、大变形和滑移接触等多个非线性因素,因此带来了很大的设计难度。过去主要由有经验的分析工程师进行有限元分析,成本昂贵。
 
 
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Company:

Pratt&Miller

Products:

Industries:

Automotive

Overview:
作为一家非常成功的赛车设计者和制造者,Pratt&Miller学会了如何在紧张的工期中进行赛车研发,并第一时间取得成功。2005年,公司成立了工程服务部门将这些技术推广到其他工业领域。在工期只有几个月的时间里,为国防客户开发出了全面设计的展示车辆,MSC Software公司的ADAMS软件进行的车辆动力学仿真起到了关键作用。
 
 
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Company:

Leading Edge Engineering

Products:

Industries:

Overview:
许多公司已经使用FEA分析他们的结构,使用一系列静力或者惯性载荷和模态分析来验证他们的产品。这些载荷通常可以有效的工作,成功避免灾难性事件。因而,大部分公司就不再进一步仿真和预测疲劳失效。然而,在开发周期的早期就进行疲劳失效预测,可以节省数次物理原型反复测试过程所造成的时间和金钱的花费。进行疲劳失效仿真可以减少长期保修成本,可以用来优化产品结构。
 
 
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Company:

クヌーズEハンセン社

Products:

Adams

Industries:

Energy
Shipbuilding

 
 
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