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📅August Community Roundup +Exciting Announcements 📢
Hi Everyone, Sorry for the delay on our August roundup! Its been a busy month, but we didn't want to miss highlighting all the great activity in our community. 📢Introducing the Altair RISE Program Get ready for something special! Our RISE Program(Recognition for Innovation, Solutions & Expertise) officially launched in…
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Community Champion of the Month - August, 2025
The Community Team would like to introduce the August Champion of the Month, Dr. R. B. B. Ovando. Dr. Ovando is a researcher and engineer working at the intersection of electromagnetism, heat transfer, fluid dynamics, materials (stress, mechanical and physical metallurgy), and numerical simulation. His work combines finite…
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Altair RISE : Program to Recognize and Reward our most engaged Community Members
🚀 Altair RISE Program We're excited to launch an exclusive 6-month program designed to recognize and reward our most engaged community members! Whether you're answering questions, sharing solutions, or participating in discussions, RISE gives you recognition in the community while helping you grow your expertise. Progress…
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Altair Community Rewards and Recognization
The Altair Community is a space where beginners, experienced users, industry experts, students, faculty and our product specialists come together to share insights, collaborate, and find ways to take full advantage of our products. Engagement is at the heart of the Community and with the launch of our new and improved…
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PhysicsAI Tips and Tricks 2 : Pre-requisites when performing prediction using Global & Nodal Hooks
Hi PhysicsAI users, When performing prediction using inputs via ‘Global’ or ‘Nodal’ Hooks approach in PhysicsAI, the below mentioned considerations are important to be followed. The CAD or solver deck to be used for prediction should have an associated .json file named _predict_inp.json which should be saved in…
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接触の微小な初期干渉を除去する ADJUST オプションの使用例
はじめに 理想を言えば、初期干渉のないモデルを作ることが理想ですが、どんなにキレイに CAD やメッシュを作成しても、それ等自身も、ある程度の交差を持って作成されたデータですし、実際に計算を実行する OptiStruct にしてもコンピュータ自身にしても、数値の丸め誤差があるので、初期干渉と、判定されてしまうことはあります。 目に見えて判断できるようなものは、メッシュで取り除いた方がよいとしても、あまり細かいところまで気にしていると、いつまでもモデルが完成しないので、ここは、OptiStruct 自身が持つ初期干渉調整機能を使うのがよいかと思います。 例題1、初期干渉をしてしまうモデル ダウンロード:…
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New eLearning Course - Virtual Die Tryout Analysis with Inspire Form
We recently released a new eLearning course, Virtual Die Tryout Analysis with Inspire Form. Explore tryout analysis for forming. Build the skills needed to set up and analyze complex multi-stage stamping processes with tools and blanks in Inspire Form. Learn about Virtual Die Tryout Analysis, at your own pace! Virtual Die…
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Buckling Studies of a Short-Span Steel Girder Bridge Part 2
For Part 1, see here: What Have We Learned: The Nonlinear Static analyses, an inherently more accurate analysis type than the P-Delta types, predicts that buckling will occur at approximately 5x of the “Dead + Self Weight” Load Combination. In the real world, despite the best efforts of the crew designing, constructing,…
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Buckling Studies of a Short-Span Steel Girder Bridge Part 1
This document aims to introduce the various ways one can study buckling behavior in S-FRAME. We will examine this using a generic steel girder bridge structure, which has been deliberately altered to weaken it, hence allowing us to illustrate buckling behavior. The modifications from the original design include: Reduction…
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The Fibers Bonding Model in EDEM
The need for fibers in EDEM Fibers are fundamental in some industries like Agriculture, Construction, Fabrics Manufacturing or Battery Manufacturing, among others. EDEM has been used in the past in simulations within these fields, but it did not offer a model specifically designed for fibers. The Fibers Bonding model is a…
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なぜかすごい初期干渉が起きてしまう例題と回避方法
初めに OptiStruct の接触 (CONTACT カード) を使っていると、なぜか、ふいに、ものすごい初期干渉として判定されてしまう時があります。 今回は、ものすごい初期干渉をしてしまうモデルを一つ提示し、なぜそうなってしまったのか、どういう回避方法があるのか、といったところを示します。 例題モデル ダウンロード: このように２枚のシェル要素が重なっているモデルです。厚みがありすぎて初期干渉しているわけではありません。両方の板厚は 1mm で、隙間も 1mm あります。 HyperMesh で立体表示させるとちょうどつらつらです。 このモデルを実行すると、時刻 0 でとんでもない桁の接触力を見ることになります。単位系は ton,…
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PhysicsAI Tips and Tricks 1 : Enabling GPU for PhysicsAI 2025.1 version on Linux
Enabling GPU for PhysicsAI 2025.1 version on a Linux machine Hello PhysicsAI users, When using PhysicsAI 2025.1 version on a Linux machine, cuDNN 8.9.7 version needs to be installed on the machine. CUDA Toolkit 11.8 version remains the same. If cuDNN 8.7 version is used along with CUDA Toolkit 11.8 on a Linux machine for…
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Modeling of Hypervelocity Impact in Composite Laminates with Altair Radioss
This post presents an Altair Radioss solution to simulating hypervelocity impacts on composite laminate. It is based on Meso-scale modeling of hypervelocity impact damage in composite laminates from Aleksandr Cherniaev & Igor Telichev, published in Composites Part B: Engineering, volume 74 (June 2015) [1]. Figure 1: Bullet…
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Material Selection for Plastic Gears Using Altair® Material Data Center™
Plastic gears are widely used in automotive, industrial, and consumer applications due to their cost-effectiveness, low weight, corrosion resistance, and quiet operation. In the automotive industry, plastic gears can be found in critical subsystems such as windshield wiper mechanisms, seat adjusters, electric window…
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ROPS Analysis with OptiStruct Explicit
The goal of this article is to demonstrate how to use Altair OptiStruct explicit capabilities to perform a rollover protective structure (ROPS) analysis. In the attached presentation, users can find the model details and results. This article includes: A ready-to-use Altair OptiStruct model Altair HyperMesh v2025.1 Altair…
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Feasibility Analysis and Nesting with Inspire Form
We recently released a new eLearning course, Feasibility Analysis and Nesting with Inspire Form. Explore feasibility analysis for forming with automated blank fit and nesting processes. Build the skills needed to apply Inspire Form effectively and enhance your forming simulations. Learn about Feasibility Analysis and…
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Polymer Extrusion Analysis with Inspire
We recently released a new eLearning course, Polymer Extrusion Analysis with Inspire. Explore the core processes used in the polymer extrusion industry. Learn how to use Inspire Extrude to perform polymer extrusion simulations, including tool deflection and calibration. Learn about Polymer Extrusion Analysis, at your own…
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Accelerating EDEM Material Model Calibration with romAI: A Case Study from Uniaxial Compression Test
Authors: Ambrish Singh and Spyridon Mallios 1.0 Introduction A Discrete Element Method (DEM) simulation can provide critical insights into the behavior of granular media subjected to various environmental, process, and operating conditions. However, prior to modeling process of interest, ensuring that the DEM simulation…
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Active & Reactive Power Control with PSIM-trained Dynamic Reduced Order Models (romAI)
PSIM is a powerful simulation tool for power electronics, known for its fast performance. However, when simulating systems with lots of power converters, the overall simulation time can become significantly long. To address this, we are exploring methods to simulate multiple converters more efficiently, including AI…
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Ifric=3 で静摩擦、動摩擦を表現する例題
はじめに Radioss の接触カード /INTER/TYPExx シリーズや摩擦定義カード /FRICTION の摩擦モデルには Ifric=3 で指定できる Renard 則というものがあり、これを使うと、学校で習った、静摩擦、動摩擦のように滑り速度で変化する摩擦係数を指定することができます。 本記事では、もっとも簡単に、静摩擦、動摩擦として使ってみる方法と、例題モデルを一つ提示します。 簡単な使い方 まず、学校の理科や物理では、静摩擦係数 0.3, 動摩擦係数はその半分の 0.15 などというように習いましたが、このモデルは、そのような…
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PSIMとHyperStudyによるeDrive効率マップの高速生成
このセッションでは、Altair PSIMとAltair Fluxのシームレスな連携を活かし、インバータレベルおよびシステムレベルでの効率マップ作成プロセスを、エンドツーエンドでご紹介します。さらに、すべての動作ポイントを確実に網羅するための戦略やヒントも解説します。 PSIMは、パワーエレクトロニクス分野においてその高速性と堅牢性で知られており、複数のe-Drive動作ポイントを定常状態までシミュレーションする際に非常に有効です。しかし、私たちはそれだけでは終わりません。さらに強力なツールも活用可能です。 設計空間探索と最適化ツールであるAltair…
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音響メッシュだけでの固有値解析
はじめに OptiStruct のヘルプには様々な例題があるのですが、シンプルに、音響メッシュだけで、音場の、固有周波数 (共鳴の周波数) を計算するものがありません。なにかと、構造―音場連成の周波数応答解析のようになっていたりします。 そういったモデルも、構造の振動解析モデルと、音場の振動解析モデルの組み合わせですので、音場だけの固有値解析モデルの作り方を知っている方が、何かと、そういったモデルを理解する助けにもなると思います。 そこで、本記事では、非常に検証が簡単な、両端を開放した管が作る音場の固有周波数を求めるモデルを提示します。 モデル ダウンロード: 長さ 220mm, 直径 10mm…
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[HyperGraph] Curve의 각 지점에 대한 데이터를 외부로 옮기는 방법
HyperGraph에서 Curve의 각 지점에 대한 데이터를 외부로 옮기기 위해서는 아래 그림과 내용을 참고해 주시면 됩니다. Define > Values > 원하는 데이터에 대해 셀 선택 후 우클릭 > Copy
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New and Improved Features in Altair Radioss 2025
This article summarizes the updates introduced in Altair Radioss versions 2025 and 2025.1. For complete details, please refer to the attached presentations and the official Altair documentation. Version 2025.1 Altair Radioss v2025.1 Documentation - What's New /DAMP/FREQUENCY_RANGE is a new option that defines constant…
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[PhysicsAI] GPU를 사용하여 학습하기 위한 기본 요구 사항
Data set을 만들고 Training을 위해 GPU리소스를 사용하려면 기본적인 요구 사항을 충족해야 정상적으로 진행할 수 있습니다. 2025.1 버전 기준으로 확인 및 조치를 취해야 할 사항은 다음과 같습니다. Compute Capability 6.0 이상의 NVIDIA GPU 사용 NVIDIA CUDA Toolkit 11.8 설치 NVIDIA cuDNN 8.7 설치 관련한 상세 내용은 아래 링크를 통해 확인해 보실 수 있습니다.…
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[HyperGraph] 다수의 Curve 데이터를 기반으로 각 지점 별 최대값 Curve 생성
HyperGraph에서는 다수의 Curve를 생성하고 이들을 기반으로 각 지점별 최대값으로 Curve를 생성할 수가 있습니다. Plot Browser에서 원하는 다수의 Curve를 다중 선택 우클릭> Multiple Curves Math > Max Envelope 선택
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Metal Forming Analysis with Inspire Form
We recently released a new eLearning course, Metal Forming Analysis with Inspire Form. Explore the fundamentals of sheet metal forming simulation using Inspire Form. Learn about different metal forming processes, common failure modes encountered in production, and how to interact with the stamping simulation environment.…
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初速を遅れて与える例題
はじめに Radioss 2025.1 から初速カード /INIVEL に Tstart オプションが入りました。 これによって、自由に初速を与える時刻をずらすことができます。 なお、この Tstart のある行に HyperMesh 2025.1 が対応していないので、テキストエディタで手入力が必要です。例題モデルを HyperMesh 2025.1 に読み込むと Tstart のある行が消えるので、注意しましょう。参考記事はこちら、 例題 ダウンロード: このような単純なモデルです。 /INIVEL カードはこうなっています。インクルードファイル 01_inivel_0000.inc に記載しています。 ちなみに HyperMesh…
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Boost Simulation Usability with Materials Intelligence in Altair® Material Data Center™
Incomplete material data can be a major roadblock in simulation workflows - especially when accuracy, multi-physics compatibility, and solver-readiness are critical. The Materials Intelligence capability in Altair® Material Data Center™ (AMDC) addresses this challenge head-on by automatically identifying and filling data…
