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  • About thermal analysis in Geostationary Transfer Orbit

    I am analyzing a satellite in Geostationary Transfer Orbit (GTO). I would like to do a thermal analysis in GTO, is there any way to simulate it? I would like to achieve this using Partan. Should I ask this question on the Nastran forums…

  • Can temperature load be applied to solid shell elements?

    Hello, I am running a solid shell composite elements model with SOL 400. I managed obtaining good results using a 1 increment NLSTATICS analysis for an applied quasistatic acceleration. However, when I want to apply a temperature load with "TEMPERATURE…

  • true strain

    true strain

  • Patran/Nastran2021に置ける伝熱解析の2物体間の熱的接続の方法をご教授をお願いします。

    Patranのフォーラムの方でも質問をさせていただいたのですが、Nastranの問題の可能性があるとも感じたのでこちらのフォーラムにも投稿させていただきます。 2つのブロックを重ねて上下に温度差をつけて熱解析を行ったのですが、2物体での温度の行き来がなく、ブロックごとで温度が定常になってしまいました。 お手数ですが、​ブロックを熱的に接続する方法を教えていただきたいです。 ​ 始めたての初心者ですので、極力詳細に教えていただけると幸いです。​

  • Removal of rigid body motion for extraction of displacements

    Hello, I got a structure with different substructures assembled to it. All the structures are loaded and i am interested in displacements of substructures only (that means the displacements causing due to primary structure are need to be excluded…

  • Nastran実行時の問題について質問します． 他の機関からNastranのインプットデータを提供して頂き，これをそのまま用いて解析を実施したところ，解析結果が何も出力されない状況に陥っております． 添付は解析後に出力された，log，f04, f06ファイルです． エラーは見受けられないのですが，f06の最後にNo PARAM values were set in the Control Fileの一文があります。原因についてご教示ください．

    必要であればインプットデータ（致します（バルクデータ：wingstrut.bdf と，荷重データ：all_loads.fem の2つから構成）の送付も可能です． Attached Files (3) wingstrut.f04.zip wingstrut.log wingstrut.f06.zip

  • How to postprocess temperature decrease in Patran

    Hello i have rubber model of silentblock using sol400, my first load step is static, where is defined initial temperature 150 degs and nodal temperature at time 1 (20 degs). From disp. results it looks like model is working (silentblock is shrinking)…

  • Is there a way to run a 103 solution using PARTs super elements without super element reduction?

    I have a model that is made up of many smaller components. Some use repeated ids for grids and elements. I can combine the components easy enough using BEGIN SUPER, SEBULK and SECONCT for each. Each PART is a single INCLUDE statement with an associated…

  • How to make the result from the Superelement reduction more accurate?

    I created a plate with an frequency dependent force from 20 to 1000 Hz. I analysed the plate with SOL 111. For the Frequency Range of Interest for the Real Eigenvalue Extraction and for the F requency Response solution parameters frequency recovery points…

  • Problems with SOL 111 and superelements

    I created an SOL 111 analysis which runs well. After that I wanted to create superelements and make the same analysis, but I get an error: * APPLIED LOADS *** USER FATAL MESSAGE 3046 (SQFREQ) THIS FREQUENCY RESPONSE ANALYSIS HAS NO…

  • Format Problem of Example Input Files at User's Guide

    Greetings, I am trying to analyze the example at "MSC NASTRAN 2019 Aeroelastic Analysis User's Guide - CH9: Dynamic Aeroelastic Response Analysis - Discrete Gust Response of BAH Wing (Example HA146A) ". I copied and formatted according to the…

  • Improve the result from superelement analysis (SOL103)

    In the superelement user´s guide is described that "Obtaining more modes for each superelement would improve the accuracy of the residual structure modes". While I´m using this method and increase my number of desired rootes from 100 to…

  • Can I output grid/element results using plot and punch results for a smaller set at the same time? I have a sol 106 run and I want to send a subset of results to a punch file.

    Can I output grid/element results using plot and punch results for a smaller set at the same time? I have a sol 106 run and I want to send a subset of results to a punch file.

  • AUTOMSET + RIGID=LAGRAN?

    Is there a way to use CTE on RBE2 with AUTOMSET? It seems AUTOMSET is ignored while using RIGID=LAGRAN in SOL101, can't run without it on the model we have to run... Any way of doing this, it's a simple TEMP(INIT)/TEMP(LOAD) case, but the rigids need…

  • Is there a possible way to achieve optimized design or initial design from SOL200 that I can directly import on PATRAN and do analyses for different cases?

    Greetings, My question will be about SOL200 “Design Sensitivity and Optimization”. I have a SOL200.bdf file. When I run it on NASTRAN, it gives F04 and F06 files. F06 file doesn’t state any fail, error or warnings. When I import SOL200.bdf…

  • Need help to clear max pivot ratio error for a peculiar constraint.

    I am doing a thermo-mechanical coupling simulation for the rotor carrier of an axial flux machine which has the permanent magnets glued to it. I applied my magnetic forces on the magnets and a centrifugal force. I added a thermal load of 90C to the model…

  • How do I generate the stiffnex, mass and damping matrix put of my model?

    How do I generate the stiffnex, mass and damping matrix put of my model?

  • How to model a viscoelastic material using Storage and Loss modulus

    Hi everyone, I have to run some armonic analysis on a rubber component. Its mechanical properties are frequency dependent. The component supplier provided me a datasheet with the stiffness and loss factor (tan_d) at several frequencies. …

  • When trying to run a bdf file, Nastran closes almost instantly. I tried to check the F06 file for Fatal Errors, but no output files were generated. How do I diagnose what's going wrong?

    When trying to run a bdf file, Nastran closes almost instantly. I tried to check the F06 file for Fatal Errors, but no output files were generated. How do I diagnose what's going wrong?

  • SOL 106 - Export Stiffness Matrix in nonlinear case

    Hi, to export the stiffness matrix of a purely linear FE model I've successfully referred to the MALTER command explained in simcompanion.hexagon.com/.../how-to-export-mass-and-stiffness-matrices-of-a-large-model so far. But in addition…

  • Buckling Analysis _ S105_Number of roots

    Hello I am trying to perform the buckling analysis using SOL105. Initially I requested, Number of roots desired as 55. When I tried to increase the Number of roots to more than that, I am getting the following message(in bold). EIGRL…

  • ACMS solver generate an fatal massage 601 (IFP1D)

    Hey, I used to work with the Lanzos Solver. Now i wrote the Input File with the ACMS solver and include the line: DOMAINSOLVER ACMS into the CASE CONTROL, but generate the fatal massage 601 (IFP1D). I know that ACMS doesn´t work while…

  • How to adjust the iteration settings in SOL101

    I had a multibody contact FEM with SOL 101 running and it went up past 48 iterations, and it appeared to be "chattering". I'd like to set a max number of iterations it can do before terminating, and hopefully allowing me to import whatever results it…

  • 単点拘束（SPC）について、成分番号１～6を指定し拘束をかけています。 拘束している方向に対し、強制変異を入れなければ固定と理解しています。 このSPCの拘束を仮にばね乗数に置き換えた場合、どの程度のばね乗数にとなるかご教示願います。1＋10^10以上とか。

    単点拘束（SPC）について、成分番号１～6を指定し拘束をかけています。 拘束している方向に対し、強制変異を入れなければ固定と理解しています。 このSPCの拘束を仮にばね乗数に置き換えた場合、どの程度のばね乗数にとなるかご教示願います。1＋10^10以上とか。

  • Nastran can´t identify the line break.

    I writed an Input File. The last section is to include other models: $ INCLUDE 'E36_KONZEPT_S01_190222_000_Gerippe.nas' INCLUDE 'E36_KONZEPT_S02_190222_000_Dachsystem.nas' INCLUDE 'E36_KONZEPT_S04_190222_000_Frontsystem.nas'…
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