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模態分析建議的約束條件
Description: 我要進行模態分析，但我該如何確認我的接觸條件是合理的，亦或是我該將模型視為理想的，將所有接觸條件設定為Tie。 Product/Topic Name : optistruct 2022.2
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When I am importing. SLDASM in V2024 Hypermesh Optistrut. Why is It not supporting the file?
After importing this file, I am not able to see cad file of the model and I am not able perform any function on that why?
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DVPREL2, DEQATN を用いて、数式で、要素プロパティの最適化を行う例
始めに OptiStruct の寸法最適化 (要素プロパティや、材料の値を変化させる最適化) は、通常、設計変数 = 書き換えたいプロパティ値、として使います。しかしタイトルに挙げたカードを使うことで、書き換えたいプロパティ値 = 設計変数で演算した結果値、という風にすることができます。本記事では、その例題を一つしめします。 例題 入力モデルダウンロード このような矩形断面の梁要素を考えます。片持ち梁の問題です。 面積 A、断面二次モーメント1 I1, 断面二次モーメント2 I2 はそれぞれ A=bh I1=b h^3/12 I2=b^3 h\12 です。最適化で A, I1, I2 を設計変数にするのではなく、b, h…
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Experiencing error while solving optistruct case called *** INTERNAL PROGRAMMING ERROR ***
*** INTERNAL PROGRAMMING ERROR *** in file "nlstatslv0.F" at location #3131 in V2022.3,kindly help to rectify…
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非線形静解析: NLADAPT, NLPARM, NLOUT でアニメーションを細かく出力する例題
始めに 非線形静解析は、NLOUT カードによる出力設定をしていないと、最終結果だけ出力します。すると、このような回転の動きを計算したときに、 このような意味不明のアニメーションを見ることになります。 HyperView は各節点が最終的に反対方向に位置している、という結果しか知らないからです。 ですので、時に、途中のアニメーションを出力することで、HyperView に経路を教えることが必要になります。 また、アニメーションの出力を要求していても、OptiStruct…
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Steady State Heat Transfer Analysis- Convective heat transfer coefficient in SIMLAB
Description: I have been performing a heat transfer analysis for Plastic Box molded with steel plate. My aim is to find the heat transfer when I apply the Temperature as 50 deg/c in one face of the steel plate. For This Analysis, I am using SIMLAB. I meshed the model, created a Heat Transfer Solution and Assigned the…
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OLOAD で荷重条件を H3D に出力して、確認する例題
始めに 個人的な感想ですが、OptiStruct の SUBCASE セクションの荷重条件指定方法は難しいと思います。自分の考えている荷重条件が設定できているのか確認したくなります。 そのようなときは OLOAD という I/O カードで、入力条件である荷重条件を、結果ファイル .h3d に出力することができます。 例題 モデルのダウンロード: このモデルは、このように力荷重と温度荷重を与えています。 サブケースでは、このような入力になることを期待したものになっています。 ファイルの先頭に OLOAD(H3D)=ALL を記入して、先ほどの温度と力を出力してみます。 希望通りの入力ができたことが確認できました。
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Optistruct converge problem
Hello, I am working on the deformation of an engine. The engine is mounted to the ground with 4 bolts. The engine is operating in a hot environment. Both force and thermal loads act on the engine. I addressed the problem in 2 load steps. In the first load step, I torque the bolts necessary for assembly. In the second load…
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Is this a sign of insufficient memory ?
I use optistruct to optimize a model, it stops at the 9th step and doesn't finish this job. The solver displays following information: The amount of memory allocated for the run is 800 MB. This run will use in-core processing in the solver. MUMPS solver will allocate memory separately and may run in different core (in/out)…
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OS-T1040: 線形座屈解析セットアップを HyperMesh 2025 で行う例題
始めに 本記事では、昔の HyperMesh 用に書かれた線形座屈解析セットアップの例題 OS-T1040 をもとに、線形座屈解析の設定を HyperMesh 2025 で行ってみる例題です。 なお、録画時のノリで数値を適当に打ち込んでいるので、リンク先と入力している数字が違う、といった部分はご容赦ください。 動画による説明 動画ファイル .mp4 ダウンロード 参考: 完成モデル 動画で完成させたモデルです。OptiStruct 2025 での動作を確認しています。参考まで。
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How to use FINITE Tracking in Non Linear Analysis in v2025?
I use Hyperworks 2025. I was trying to run a non linear analysis, I realised that FINITE tracking in Tracking option in contact definition, is not available. The only options I see are Small and CONSLI. Is this an intentional change. Can I still access FINITE tracking. It was there in the earlier versions. Also I see…
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Topology optimisation responses and constraints
Hi! I wish to perform topology optimisation. Here i have applied basic boundary conditions: Fixed constraints (SPC) and Loads. For response variable, i have selected compliance and volume fraction. I have applied a upper bound constraint of 0.4 on my volume fraction. And my objective function is compliance response here.…
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Postprocessing issue using Matrix Browser: Unable to obtain element wise boundary condition data
Here as you can see in figure i have a cantilever beam with single point constraints and forces applied to it. I wish to query this using the matrix browser to obtain a csv output. However, i am facing issues that i cannot find load applied or spc w.r.t elements since they are experienced by nodes and not elements so is…
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OS-T1085:定常熱伝導解析を HyperMesh2025 で実施する例題
はじめに こちらのチュートリアルですが、今リリースされていない昔の HyperMesh を使っての例題になっています。 本記事では、これを HyperMesh2025 で行う方法を動画で説明します。 操作動画 動画ファイルのダウンロード
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OptiStruct CONTACT Setting – FREEZE + ADJUST=AUTO not closing gap
I have a question regarding the proper CONTACT setup for modeling surfaces that are fully bonded with no initial gap. In previous cases, I was advised to include a small clearance (e.g., 0.01 mm) between components to avoid convergence issues due to nodes being too close. However, in my current model, the physical assembly…
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Sand Bashing Demo with EDEM Multiphysics
Driving a vehicle over sand dunes is called as sand bashing and it is also known as dune bashing. Sand bashing helps to: Predict the impact forces Obtain the body deformation Understand the skid plate wear Access structural strength Simulation Methodology: Sand bashing is carried out using three methodologies such as：…
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OptiStruct: MATHE: Foam material
hi, Let's consider a system where two plates (made of any material, with given dimensions) are placed with an EPDM foam sandwiched between them. One plate is fixed, while a force of 50 N is applied to the other plate. I want to determine the displacement (or compression) of the foam from its original shape due to the…
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How to obtain the ZERO POSITIVE CROSSING to perform a FATIGUE Analysis
Hi, I need to obtain the Zero Positive Crossing to perform a fatigue Analysis. I find something online but it isn't clear. In particular, I didn't understand in which element I need to see these value. Thank you
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Time Step display problem in HyperMesh with OptiStruct interface
Hi, I am trying to check element quality in HyperMesh with OptiStruct interface, but I found that the "time step" item could not be displayed normally. It always shows zero value just like the figure. I have tried in HyperMesh v2024.1 and v2025, the situation is the same. Thank you.
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Load by Equation
Summary: If you want to know how to apply a load (force, pressure) using an equation (varying over a position), this is the article for you. A common request is "how can I apply a load like this one?" Figure 1: Pressure on a ship panel. Figure 2: Sinusoidal force. Discussion: Defining of an equation Creating a local system…
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音響構造連成解析チュートリアル OS-T1330 を HyperMesh 2025 で実施する例題
始めに こちらの音響構造連成解析のチュートリアルは、今はリリースされていない古い HyperMesh で作業の指示が書かれています。本記事では、これを HyperMesh 2025 で行うところを、動画でお伝えします。 作業動画 動画ファイルのダウンロード
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Why is my SPCF output request not exported correctly to the solver deck? (causes ERROR # 1466)
Hello everyone, I am running a model which includes three frequency response loadsteps, each setup identical except with the exitation beeing in a different direction. I'm using Hypermesh 2025. I've setup the output requests as follows: I'm using OptiStruct 2022.1 for this analysis since this is currently the only way to…
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Rotating loads in frequency response analysis
Hi, I need to evaluate the response of a structure subject to two dynamic load: 1 motor spining at 1000 RPM - 10 kN amplitude 1 motor spining at 500 rpm - 2 kN amplitude My questions are: Is using FREQi cards setting the frequency range for the overall structural or one particular load (either 1 or 2 in my case) In the…
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Nonlinear constraints (Boundary) of shell colume structure
Hello everyone, I am currently using OptiStruct to simulate pile-soil interaction and have encountered some challenges that I hope to get your insights on. In my model, the steel pipe piles are simulated using shell elements. To accurately capture the pile-soil interaction, I need to apply nonlinear boundary conditions at…
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Nonlinear constraints (Boundary) of shell colume structure
Hello everyone, I am currently using OptiStruct to simulate pile-soil interaction and have encountered some challenges that I hope to get your insights on. In my model, the steel pipe piles are simulated using shell elements. To accurately capture the pile-soil interaction, I need to apply nonlinear boundary conditions at…