CAD 내장형 통합 해석

SimDesigner는 CATIA V5 CAD 환경에서 MSC Nastran, Marc, Adams의 기능을 이용해 선형 및 비선형 해석, 열해석, 동역학 해석을 수행할 수 있게 해주는 툴입니다. 이제 기업의 대부분은 시뮬레이션을 단순한 설계 검증용이 아닌 기능적 성능 분석을 통해 설계를 선도할 수 있도록 제품 개발 과정에서 시뮬레이션을 추진하고자 합니다. 이런 접근 방식은 설계 엔지니어와 해석 엔지니어 사이에 벽이 존재하는 기업에게는 난제가 될 수도 있습니다. CAE 엔지니어는 가장 기본 단계의 해석이라도 시작하기 위해서는 상세 설계 도면을 기다려야 하고, 반대로 설계자는 해석 검증이 완료될 때까지 기다려야 하기 때문입니다. 설상가상으로 설계 프로세스의 후반부에서 수정이 발생하면 비용은 몇 배나 증가하게 되고, 제품 출시도 현저하게 지연될 수 있습니다.

SimDesigner는 설계자 또는 해석자에게 강력한 선형, 비선형, 동역학 솔버 기술을 CATIA V5 사용 환경 내에서 제공하여 설계 초기 단계에서 해석을 수행할 수 있게 해줍니다. 익숙한 CAD 환경에서 사용하기 쉬운 분석 기능을 제공해 CAD 데이터의 변환과 수정을 생략하고, 설계 프로세스 초기 단계에서 시뮬레이션을 수행할 수 있어, 제품 출시 이전에 설계의 결함을 수정할 수 있게 됩니다.

SimDesigner 기능:

Motion Workbench

Powered by Adams solver technology, Motion Workbench is used to perform multibody dynamic simulations on CAD assemblies.

• Convert CATIA assemblies to motion simulation models automatically
• Simulate mechanisms including contact and friction
• Compute part deflections and stresses by modeling some components as flexible bodies
• Transfers seamlessly load histories from Motion workbench to Structures workbench to create boundary conditions and loads on finite element models
• Post-process within the CATIA V5 application to review the results

Structures Workbench

Powered by MSC Nastran solver technology, Structures Workbench is used by engineers to perform linear static stress analysis, normal modes, modal analysis with differential stiffness, buckling, and modal frequency response studies. Users can also perform nonlinear analysis to simulate structures with large deformations, material plasticity, and nonlinear contact between components.

• Apply loads extracted from the Motion Workbench as boundary conditions
• Perform thermal-mechanical analysis when combined with the Thermal Workbench to investigate mechanical stresses caused by heat and thermal changes
• Conduct multi-step analysis to simulate behavior of parts undergoing complex loading sequence
• Review results within CATIA V5 environment

Thermal Workbench

Thermal workbench is used to perform steady-state and transient thermal analysis using MSC Nastran solver technology.

• Simulate heat transfer due to conduction, convection, and flux
• Compute temperature distributions for subsequent use as boundary conditions in structural analysis
• Analyze heat transfer across multiple parts in contact in an assembly (thermal contact)

Nonlinear Workbench

SimDesigner Nonlinear provides access to nonlinear analysis functions of Marc directly from inside CATIA V5 to accurately model the structural behavior due to nonlinear effects. Available capabilities include:

• Large deformations
• Material plasticity
• Hyperelasticity (Rubber elasticity)
• Time-varying loads
• Contact analysis
• Parts and assemblies
• Virtual parts

SimDesigner Suspension

SimDesigner Suspension, based on the architecture of Adams/Car, is tailored to the CATIA environment for modeling suspension systems within CATIA V5 environment. It allows you to create virtual prototypes of vehicle suspension subsystems, and analyze the virtual prototypes much like you would analyze the physical prototypes.

SimDesigner Suspension has two User Modes:

• Standard Workbench: You use it when working with existing subsystems to create and analyze assemblies of suspensions.
• Expert Workbench: You can use Expert Workbench to create new subsystem structures for use in Standard Workbench, helping improve standardization and customization in the organization.

Using SimDesigner Suspension, users can quickly create and analyze the suspension system behavior with the help of integrated Adams/Car templates like double-wishbone suspension, MacPherson strut suspension, rack and pinion steering. Custom templates can also be used to create the subsystems giving users the highest level of flexibility. Users can perform studies with realistic inputs, including:

• Move the wheels through bump-rebound travel and measure the toe, camber, wheel rate, roll rate, and side-view swing arm length.
• Apply lateral load and aligning torque at the tire contact path and measure the toe change and lateral deflection of the wheel.
• Rotate the steering wheel from lock to lock and measure the steer angles of the wheels and the amount of Ackermann, that is, the difference between the left and right wheel steer angles.

Results can be used to quickly alter the suspension geometry or the spring rates and analyze the suspension again to evaluate the effects of the alterations. For example, you can quickly change a rear suspension from a trailing-link to a multi-link topology to see which yields the best handling characteristics for your vehicle.

Once you complete the analysis of your model, you can share your work with others. You can also print plots of the suspension characteristics.