資料介紹

語言：英語
網址：http://www.lmsintl.com/virtuallab
類別：三維虛擬樣機仿真



（from：NET）
LMS Virtual.Lab提供一套集成軟件平台用以模擬機械系統的品質屬性，如結構完整性、振動噪聲、耐久性、系統動力學特性、駕駛的平順性及操縱的穩定性等。LMS Virtual.Lab包括所有關鍵過程步驟及所需的技術，可對每個關鍵屬性進行從頭到尾的評價。使用LMS Virtual.Lab，工程團隊可以建立精確的仿真模型，模擬其真實的性能，並能在實物樣機建造之前快速有效地評估及優化設計方案。

精確仿真產品的真實工作特性

日益激烈的市場競爭促使制造商不斷提供具有足夠吸引力的產品，以滿足或超越客戶的期望。這就需要可靠的設計流程和界面友好易用的工具，幫助他們對新產品功能品質屬性設計進行深入地了解，LMS Virtual.Lab恰恰滿足這一要求。它能夠精確地建立模型，並能仿真在真實的工況下產品的機械設計特性。LMS Virtual.Lab強大而精確的求解器，創新的工具，全面考慮進了使用者的真實使用情況，可准確地檢測出產品設計的薄弱環節，使用戶能夠及時有效地評估多種設計方案，從而做出設計決策。

產品開發流程化

為了縮短產品推向市場的時間，研發部門必須加快研發過程的每個環節。LMS Virtual.Lab使他們可以從產品概念設計的早期，在建立詳細的CAD模型出來之前就對產品設計進行評估。產品研發團隊能夠從一開始就做出正確的決策，從多個學科平衡產品的性能。更重要的是，可以避免以後昂貴的設計修改。LMS Virtual.Lab能有效捕捉和自動完成仿真過程，進而快速評估多種設計方案。其高效的求解器能以空前的速度和准確性處理大型仿真模型。總之，在不斷縮短的產品開發周期的情況下，LMS Virtual.Lab是設計和開發更好產品的理想工具。


LMS國際公司已發布了它最新版本的仿真功能集成解決方案：LMS Virtual.Lab Revision 10。該軟件包含了許多新的特征，從多體動力學仿真到有限元聲學模擬， 會將客戶的仿真能力提升到一個全新水平。

“隨著版本10的發布，我們以加快計算速度和提高生產效率作為重點。我們的聲學仿真軟件用戶會顯著地提高計算速度，這源於尖端技術如AML方法（自動匹配層方法）和新的MUMPS求解器的使用；同時我們的多體動力學仿真用戶也能中得到益處，例如，新的求解管理器可以管理多個項目。”LMS國際公司仿真部的副總裁Stefaan Goossens說。

在聲學仿真方面，有限元聲學以各種定制求解器為重點，以保證計算速度和提高處理效率為特征。客戶最關心的也許是AML方法（自動匹配層方法）， 這一被稱為”下一代的PML”（完全匹配層方法）不需要模擬PML吸收層。求解器在靠近輻射系統處自動提供一個簡化的有限元網格，並保持小尺寸單元，便於網格的管理和快速求解。

除了AML方法，還有其他新的特征能加速計算，包括MUMPS求解器（多波前大規模並行稀疏直接求解器），和VATV技術（聲振傳遞向量），這是LMS國際公司的專利技術。這個新的版本還可以考慮溫度對聲音的影響。

LMS Virtual.Lab Motion這個流行的多體動力學仿真軟件包（MBS）也提高了生產效率。新的求解管理器可以讓該軟件處理大量的分析案例，它還可以自動地進行數據管理。新添的LMS Virtual.Lab Motion-ABAQUS接口程序可以實現與非線性有限元的耦合仿真。該耦合仿真結合了特定部件的非線性計算精度和多體動力學的計算速度。對多體動力學求解器技術的連續投資明顯改進了求解器在求解實際模型時計算速度。

LMS Virtual.Lab Durability Thermal Fatigue軟件包提供了一個計算高溫循環和蠕變疲勞的准確、快速求解器。另外進一步改善了焊縫的模擬精度，還可以快速計算疲勞壽命。

LMS Virtual.Lab Structures軟件包是一個結構模擬和分析的集成方案，它包括對ABQUS軟件的統一裝配模擬支持，而且具有從CAD到CAE結果的先進的完全自動處理能力，用戶可以從中節省50%的時間。













LMS Virtual.Lab offers an integrated software suite to simulate and optimize the performance of mechanical systems for structural integrity, noise and vibration, system dynamics and durability. LMS Virtual.Lab covers all the process steps and required technologies to perform an end-to-end design assessment in each key discipline. Using LMS Virtual.Lab, engineering teams can build accurate simulation models, simulate their real-life performance, quickly assess multiple design alternatives and optimize designs before prototype construction.

LMS Virtual.Lab Acoustics
FEM acoustics offers a variety of custom-fit solvers and features for guaranteed speed and process efficiency. Them main new item is AML (Automatically Matched Layer). Called the “next generation PML” (Perfectly Matched Layer), AML eliminates the need to model the absorbing PML layer. The solver does it automatically, delivering a simplified FEM mesh close to the radiating system. The FEM elements are purposely kept small so that the meshes are manageable and quickly solved.
Besides AML, other speedy new acoustic features include a MUMPS Solver (Multi-Frontal Massively Parallel Sparse Direct Solver) and VATV (Vibro-Acoustic Transfer Vector), an LMS Patented methodology. New to this release as well is temperature mapping, taking in the effect of temperature on acoustics.

AML (Automatically Matched Layer)
Because the FEM mesh around the system is built very close to the radiating system, the amount of FEM elements can be kept very small, therefore these meshes are very efficient to handle and ultimately solve.

MUMPS (Multifrontal Massively Parallel Sparse Direct Solver) Solver
Significantly faster solution compared to current FEM solvers

Temperature Mapping
For some acoustics applications, the temperature can be an important, critical item. For example, in the case of exhaust systems, temperature can be high and therefore it will influence significantly the acoustics.

VATV (Vibro-Acoustic Transfer Vector)
When dealing with “random” applications such as Turbulent Boundary Layer excitation of an aircraft fuselage or when dealing with wind loads on a window, traditional techniques will take significant time. The new VATV technique (building on our experience of ATV), extends the ATV technique to coupled problems and will as such handle these problems very efficiently.

Duct Modes
Method to gain significant more insight into how noise is propagating inside ducts. With this insight, understanding the countermeasures can be more efficiently designed for

LMS Virtual.Lab Motion

The new Solutions Manager makes it possible to handle large sets of analysis cases, many with automated data management. New as well is the LMS Virtual.Lab Motion-ABAQUS connection for non-linear FE co-simulation. This co-simulation combines the accurate non-linear representation of certain components with the calculation speed of MBS. The continued investment in MBS Solver technology brings yet another significant solver speed improvement in solving realistic models in accelerated timing.

Co-simulation with Abaqus
The 2 solvers (Motion and Abaqus) work in co-simulation. Simulate certain system components with a nonlinear FE package like Abaqus, while the rest of the system is simulated with multi-body technology.

Solutions Manager
Save time in running and managing different cases: simulate as fast as possible different design variants with different parameters, different loading conditions and different boundary conditions.

Motion-TWR
This unique feature allows to simulate an unconstrained vehicle, to correlate multi-body models with test data, to transfer spindle loads from an old vehicle to a new vehicle and to serve as help for testing on physical durability test rigs.

LMS Virtual.Lab Durability

Accurate and fast, LMS Virtual.Lab Durability Thermal Fatigue, provides a unique solution for high temperature cyclic and creep fatigue. Further improvements to Seam Weld modeling enable accurate and fast fatigue life calculations.

High Temperature Fatigue
Possibility to perform simulation of thermal shocks with only simple test data needed

Seam Welds: Stress Approach
Use automated stress based methods for fatigue of seam welds.

LMS Virtual.Lab Noise and Vibration

Structural damping modeling
The structural damping is a key component in reducing noise levels. Very efficiently study the effect of damping on the noise levels.

LMS Virtual.Lab Structures

LMS Virtual.Lab Structures, the integrated solution for structural modeling and analysis, includes unified assembly modeling support for ABAQUS, and further advancing the ability to fully automate the process from CAD to CAE Results, with customer documented gains of 50% or more in time it takes to create and post-process a model.

Unified assembly modeling supported for ABAQUS
Being able to leverage the unified assembly model directly for Abaqus

ANSA
Alignment to ANSA Rev 13 & Semi-automatic mesh correction with ANSA from Virtual.Lab