Company:

Products:

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MSC Apex 可将几何体清理与网格划分所需时间缩短 75%

Overview:
原始的CAD 几何体是按照设计流程中达到的正常标准的精度创建的。TLG 的工程师们为此需要耗费大量的时间来完成几何体清理工作,以便达到有限元分析及网格划分所需的更高标准。就设计几何体而言,CAD 模型中通常会包含一些破碎的表面, 无法缝合到一起的表面以及冗余重叠的表面。
 
 
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Company:

TLG Aerospace, LLC

Products:

MSC Apex

Industries:

航空

MSC Apex Helps Reduce Time Required to Clean Up and Mesh Geometry by 75%

Overview:

Wings USA, Inc., a flight services company based in Janesville, Wisconsin, contracted with TLG Aerospace, LLC to analyze a proposed modification to light aircraft. The twin-engine aircraft is to be modified to include a large circular cutout in the floor adjacent to the aircraft door. TLG was asked to analyze the aircraft before and after the modification to determine whether or not the modification would have a significant impact on the fuselage stiffness. TLG engineers generated the pre- and post-modification geometry in CATIA V5. To accommodate the cutout, a section of the longitudinal beam at the center of the floor of the fuselage was removed in addition to a section of skin at the lower outer mold line (OML).

Benefits:
  • Create mid-planes on the fly
  • Quickly simplify geometry for meshing purposes
  • Achieve a high quality mesh in significantly less time than traditional meshing applications

 
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Company:

University of Technology of Compiègne

Products:

Adams

Industries:

医疗器械

Adams Helps Unravel the Complexities of Hand Motion for Manipulation of Virtual Objects

Overview:

The manipulation of objects is fundamental to virtual reality applications. Better methods are needed to grab and manipulate virtual objects by moving one’s hands in 3D space. But the anatomical complexity of the human hand makes it very difficult to accurately track manual motions. Haptic technology, which recreates the sense of touch by applying forces, vibrations, or motions to the user, provides cues in object manipulation. Haptic interfaces are essential in order to generate sensations relating to touch and effort. Active hand mounted devices make it possible to accurately track the hand and feel virtual objects with the fingers but they are complex and costly.

Benefits:
  • Develop a highly accurate muscularskeletal model of the hand and forearm from real kinematic data
  • Simulate the operation of the musculoskeletal system during motion
  • Unravel the complexities of hand motion

 
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Company:

BAY-LOGI

Products:

Marc

Industries:

能源

Marc Simulates Welding of Nuclear Pressure Vessel Reactor Nozzles

Overview:

The reactor pressure vessels make up the heart of a nuclear power plant, containing the core, core shroud and coolant. In water-cooled water-moderated energy reactors type power plants, nozzles on the ferritic steel pressure vessel are welded to primary coolant pipes made of austenitic steel. These nuclear power plants were built and started operating 20 to 30 years ago. The company operating one of these power plants needed to know how these welds can be expected to perform after a long period of service. It’s not practical to perform measurements on the reactor itself because of the complex geometry and the presence of radiation. Building and testing a duplicate structure would be expensive and it would also be very hard to replicate the effects of 20-plus years of operation. So the operator of the power plant agreed with the Department of Structural Integrity at Bay Zoltan Institute for Logistics and Production Engineering (BAY-LOGI) to simulate the manufacturing process to better understand the characteristics of the welded joint.

Benefits:
  • Model coupled thermomechanical effects of multi-pass welding process
  • Gain insight into residual stress distributions
  • Save on costly physical testing

 
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Company:

Litens Automotive Group

Products:

Adams
Marc

Industries:

汽车

Adams-Marc Co-simulation Makes System Analysis 15 Times Faster than Pure Nonlinear FEA Analysis

Overview:

Litens Automotive Group’s patented TorqFiltr torque modulator uses an arc spring isolator mechanism to decouple the accessory drive system inertia from the engine torsional vibrations. The Litens torque modulator controls the system resonant frequency by tuning the spring stiffness to the system inertia. Because the spring stiffness is softer than traditional rubber isolators, vibrations from the engine are mostly absorbed before being transmitted to the accessory drive belt. This results in isolation of all components in the accessory drive, and any accessory drive resonance has very small peak amplitudes, since there is very little excitation.

Results Validation:

The Marc simulations have previously been found to be very close to physical measurements. The co-simulation results for key values, such as the inner drive angle as a function of input torque, were found to vary by less than the 10% from the Marc simulation over two revolutions of the input shaft.

Benefits:
  • Adams-Marc Co-simulation Makes System Analysis 15 Times Faster than Pure Nonlinear FEA Analysis
  • The solution maintains high accuracy of the simulation
  • Enables engineers to run many design iterations in a short period of time to optimize in a practical fashion

 
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Company:

Products:

Adams

Industries:

汽车

福特公司利用 Adams FMI 的协同仿真法来优化燃料经济性与 NVH 之间的平衡

Overview:
在覆盖发动机转速范围内,我们分别用不同的转速变化值来运行该模型。仿真结果表明,转速变化率为 30 rpm 或更低时无法满足 NVH 目标,而转速变化率为40 rpm 或更高时可以满足目标。仿真还显示,转速变化率为 40 rpm 时是最优值,它既能满足 NVH 目标,又能实现燃料经济性的最佳平衡。
 
 
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Company:

Products:

Dytran
MSC Nastran
Patran

Industries:

汽车

Cleveland 高尔夫

Overview:
Cleveland Golf 的目标是成为全球首屈一指的高尔夫球用具制造商。公司需要对大量的设计可行性进行彻底、快速的评估,以便为各种技能水平的高尔夫球手生产顶级的球杆。为此,公司需要 Jeff 及其团队每月都能创作、制作并测试众多样品,以便快速优化高尔夫球杆的设计。考虑到制作样品所需的前期时间和成本,传统的“制造与试验”设计方法已无法满足这一要求。
 
 
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Company:

Products:

Dytran
MSC Nastran
Patran

Industries:

汽车

Autoliv采用 MSC.Dytran® 对新型侧帘式气囊进行仿真

Overview:
在汽车碰撞期间,侧帘式气囊表现出有助于降低弹及重伤可能性的力。虚拟产品开发工具( 在汽车碰撞期间,侧帘式气囊表现出有助于降低弹及重伤可能性的力。虚拟产品开发工具( 在汽车碰撞期间,侧帘式气囊表现出有助于降低弹及重伤可能性的力。
 
 
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Company:

Products:

Adams Car

Industries:

汽车

Adams Car 用于车辆设计和试验的真实动力学分析

Overview:
借助 Adams/Car 产品,工程师团队可迅速构建并计算整车及车辆子系统的功能虚拟样机。这有助于缩短车辆开发的时间、降低成本及风险,并且能提高新车的设计品质。通过在 Adams/Car 仿真环境中工作,汽车工程团队可在各种道路条件下对其车辆性能进行演算,这与通常在实验室或试验赛道上进行的试验结果相同,但所需的时间缩短为几分之一。
 
 
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Company:

Infosys

Products:

MSC Nastran
Patran

Industries:

医疗器械

MSC Nastran Provides More Accurate Solution to Assess Bone Fracture Risk

Overview:

Humans lose bone mass with age because their bones lose calcium and other minerals and become lighter, less dense and more porous. As this process continues, our bones become weaker, increasing the risk of bone fracture. A patient is said to have osteoporosis when bone mineral density (BMD), the concentration of minerals in a unit volume of bone, falls below a threshold value.

Results Validation:

This innovative solution to osteoporosis developed by Infosys uses computer-assisted design and FEA for the evaluation of fracture risk of the vertebrae quantitatively. Stresses computed through the simulation provide more accurate assessment than traditional BMD measurements in the determination of fracture risk. It applies best practices in mechanical engineering to understand the biomechanics of vertebrae.

Benefits:
  • Using MSC Nastran to study the mechanics of vertebrae while taking into account various factors such as the shape, density distribution of cortical/cancellous bone and other material properties of bone tissue and porosity.
  • The solution helps practitioners to study bones in a detailed and non-invasive manner, and quantitatively analyze the fracture risk of vertebrae
  • Stresses computed through the simulation provide more accurate assessment than traditional BMD measurements in the determination of fracture risk

 
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Company:

Ford Motor Company

Products:

Adams

Industries:

汽车

Ford Leverages Adams FMI Co-Simulation Method to Optimize Tradeoff between Fuel Economy and NVH

Overview:

Noise/vibration/harshness (NVH) and fuel economy often must be traded off against each other during the vehicle design process.

Challenge:

When developing a new vehicle model, engineers are responsible for meeting a wide variety of often conflicting performance targets. Fuel economy and NVH are two of the most important categories of targets.

Benefits:
  • This case study successfully demonstrates the FMI integration approach for vehicle lugging NVH assessment
  • Effectively coupled AMESim Converter Controller model with Adams Driveline and Vehicle model
  • An Optimum Torque Converter slip speed was determined meeting lugging target requirement while balancing with fuel economy
  • Simulation results showed drivetrain torsional vibration along with vehicle vibration (steering wheel & seat track) were effectively reduced with converter slip

 
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Company:

Deggendorf University

Products:

Adams
Adams Car
MSC Nastran

Industries:

汽车

Quick as Lightning - MSC Software supports 'Team Fast Forest' from Deggendorf

Overview:

Young university students make use of Adams multi-body simulation software to construct a vehicle for entry in the Formula Student competition. ‘Team Fast Forest’ from Deggendorf is using the software to study tires and chassis. Breaking conventional car design, the team will focus on electric vehicles.


 
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Company:

Mahindra Two Wheelers

Products:

Adams

Industries:

汽车

Adams Multibody Dynamics Simulations Help Bring Two Wheelers to Market 7-21 Weeks Faster

Overview:

In the past, the design of new two wheeler models at Mahindra was based on building prototypes and driving them on a test track. The limitations of this approach were that prototypes took an average of five weeks to build and had to be run for about two weeks to evaluate component durability. A major improvement came when test rigs were introduced and used to recreate the conditions of the test track using automated equipment that eliminated the need for a driver and could be operated 24X7. This approach saved time, however, a complete vehicle prototype iteration was still required for each major design change.

Solution:

Mahindra selected MSC Software’s Adams, the most widely used MBD software for over three decades. MSC Software is the world leader in both MBD and FEA software. Speaking the language of both domains gives MSC the capability to develop the rich data transfer required to fully integrate them. Mahindra has evolved a new virtual testing design process that uses Adams to simulate the performance of new designs and accurately predict their performance prior to the prototype phase.

Results Validation:

Basing the design process on simulation rather than testing provides substantial time and cost savings. The largest savings come from being able to evaluate alternative designs without having to build a prototype. The number of prototypes required to bring a new two wheeler to market has been reduced from 4 or 5 in the past to 2 or 3 now. The time to build and test a new prototype is about 7 weeks so the company has been able to bring new two wheels to market at least 7 to 21 weeks faster than was possible in the past.

Benefits:
  • Simulation provides much more diagnostic information than can be obtained from physical testing
  • Engineers perform parametric analyses to investigate the influence of design variables such as the location of hard points on accelerations
  • Excellent correlation between simulation and measurements on suspension systems
  • The number of prototypes required to bring a new two wheeler to market has been reduced from 4 or 5 in the past to 2 or 3 now
  • Adams bring new two wheels to market at least 7 to 21 weeks faster than was possible in the past

 
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Company:

Scania

Products:

Adams

Industries:

汽车

Advanced Powertrain Dynamic Analysis and Development Using Adams

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:

航空

The Laboratoire d’Astrophysique de Marseille

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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