altair nvh.pdf

Download Altair NVH.pdf

Post on 30-Nov-2015

105 views

Category:

Documents

4 download

Embed Size (px)

DESCRIPTION

Altair NVH.pdf

TRANSCRIPT

  • Innovation Intelligence

    An Innovative Solution for True Full Vehicle NVH Simulation Jianmin Guan

    May 15, 2012

  • Copyright 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Copyright 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.

    Altairs Focus

    Simulation, predictive analytics and optimization leveraging

    high performance computing and cloud architectures

    for engineering and business decision making

  • Copyright 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Copyright 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.

    Global Presence

    Seattle, USA

    Mountain View, USA

    Los Angeles, USA

    Austin, USA

    Denver, USA

    Mexico City, Mexico

    Montreal, Canada

    Toronto, Canada

    Detroit, USA

    Boston, USA

    Milwaukee, USA

    Charlotte, USA

    Huntsville, USA

    Sao Paulo, Brazil

    Lund, Sweden

    Gothenburg, Sweden

    Coventry, UK

    Manchester, UK

    Stuttgart, Germany

    Cologne, Germany

    Hamburg, Germany

    Hanover, Germany

    Munich, Germany

    Lyon, France

    Paris, France

    Sophia Antipolis, France

    Toulouse, France

    Torino, Italy

    Madrid, Spain

    Moscow, Russia

    Delhi, India

    Pune, India

    Chennai, India

    Hyderabad, India

    Bangalore, India

    KL, Malaysia

    Beijing, China

    Shanghai, China

    Tokyo, Japan

    Osaka, Japan

    Nagoya, Japan

    Seoul, Korea

    Melbourne, Australia

    Over 40 offices across 16 countries

  • Copyright 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Copyright 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.

    Altairs Brands and Companies

    Solid State Lighting Products

    Engineering Simulation Platform

    On-demand Cloud Computing Technology

    Product Innovation Consulting

    Business Intelligence & Data Analytics Solutions

    Industrial Design Technology

  • Copyright 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Copyright 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.

    Competitive Differentiation Why Altair Wins

    Powerful business model with unmatched customer value Depth and breadth of the overall solution set Market defining optimization technologies Unparalleled performance and measurability Unique ability to leverage high-end services

    to drive next generation solutions

    Strong global organization that can meet the needs of the most demanding customers worldwide

    No other vendor offers the completeness or robustness of the Altair solution set

  • Copyright 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.

    Agenda

    1. Introduction Altair 2. CAE driven vehicle NVH development

    Unlocking values in CAE Modal participation Grid participation TPA Integrated diagnostics

    4. Introduction to true full NVH vehicle simulation Meshing Assembly Loadcase setup Full vehicle optimization

    5. Summary and recap 6. Q&A

  • Copyright 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.

    CAE Driven Vehicle Development

  • Copyright 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.

    Batchmeshing Renumber FE Model

    Acoustic Model Display Model

    Lumped Parameter Model Dynamic Reduction

    Loadcase

    CAD files (From a PLM system)

    Component Model Files

    Assembly Files

    (MDL, XML or other)

    Post Processor

    (HG/HV)

    Solver H3D

    Report

    Finite Element Model Modal Model (CMS)

    FRF Model Lumped Parameter Models

    Loads Library Force Identification

    Principle Vector Analysis Input/Response Points Post-Process Request

    Variation realization Model Checking

    Model Unit System Job Submission

    Configuration Specification Assembly Hierarchy

    Symmetry Components Representation Variation

    Complex Connector Connector Variations Constraint Variations

    Local Coordinates Connectivity Checking

    Post-Solver Analysis Integrated Visualization Transfer Path Analysis

    Job History and Job Folder

    Radioss/Nastran Deck

    Auto Output Peaks Modal/Grid Participation

    Energy Distribution Design Sensitivity

    Component Assembly

    Optimization DOE

    NVH Director

    A Generic Full Vehicle NVH CAE Process Flow

  • Copyright 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.

    NVH Problem Diagnostics

    Problem Response

    Whats Moving?

    What If?

    Which Mode?

    Which Panel?

    Which Paths?

    What Power Flow?

    What DSA? What

    Energy?

  • Copyright 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.

    Modal Participation Visualization

  • Copyright 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.

    Modal Participation Visualization

  • Copyright 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.

    Modal Participation Visualization

  • Copyright 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.

    Response Studies using Modal Participation Data

  • Copyright 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.

    Benefits of Response Studies

    Find the upper limit of the selected output datas impact on the response If it is too small, you may decide not to bother with optimizing the local

    structure there

    Identify the impact of the selected output data over the entire frequency range analyzed

    improvement at one frequency is accompanied by degradations at others

    knowing the impact over the whole frequency ranges helps to ensure that the solution is a good overall solution

  • Copyright 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.

    What is Acoustic Grid Participation? Acoustic Grid Participation is a way to break down an acoustic response to contributions

    from grids on the fluid-structure interface Physically, the body structure grids vibrate, exciting the interior cavity fluid grids, eventually generating an acoustic

    response at Drivers ear

    Structure grid participation gives participations from the body structure side of the fluid-structure interface Fluid grid participation gives participations from the interior cavity side of the interface

    The word acoustic in acoustic grid participation relates to the fact that the response is acoustic. Both Structure and Fluid grid participations are acoustic grid participations

    Structure Grid Participation from Interface Grids on Structure

    Acoustic Response at Drivers Ear

    Fluid Grid Participation from Interface Grids on Interior Cavity

  • Copyright 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.

    Grid Participation Plotting Capabilities

    Fluid Grid Participation

    Structure Grid Participation

  • Copyright 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.

    Grid Participation Visualization

  • Copyright 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.

    Panel Participation Visualization

  • Copyright 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.

    What is Transfer Path Analysis?

    Transfer Path Analysis (TPA) is a technique to break down the total response to partial contributions from attachment points under operation loads

    Partial contributions to total response are calculated by multiplying transfer function with force transferred through each attachment point

    TPA is the key NVH diagnostic tool in the mid-frequency range Modal and Grid participation are more useful for understanding low frequency NVH problems. But in mid-frequency, there are often too many modes or grid areas participating, and a path based approach becomes more convenient

    Fr

    Ff

    Fr

    Ff

    Ft Fe

  • Copyright 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.

    Transfer Path Analysis Contribution Bar Plots

  • Copyright 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.

    Transfer Path Analysis Contribution Line Plots

  • Copyright 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.

    Transfer Path Analysis Contribution Colormap

  • Copyright 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.

    Transfer Path Analysis Response Studies

  • Copyright 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.

    Energy Distribution

  • Copyright 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.

    Design Sensitivity Analysis

  • Copyright 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.

    Engine Order Analysis

  • Copyright 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.

    True Full-Vehicle Simulati