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Found 33 results

  1. Hello, I am using flexible body to find out the stress generated in the trailing arm during braking. I have encountered this error and don't know what to do. I am facing issue only for this trailing arm. I carried out the same simulations for upper and lower suspension arm and am getting the required results but the simulations is failing for trailing arm. I am attaching the out file and the snips of the same below. slb trailing.log
  2. Hello all, I'm doing a motion analysis of a Bicycle frame where I have to analyze a motion of the frame and find the force on suspension entity also to find the displacement of suspension entity. I want the Rod marked near the "1" should move along the curve. I've tried a lot but ended up wrong. Please, provide me with proper guidance. Please check whether the constraints I've given is correct or not... Please, refer the figures below... I want the rod 1 to move along the curve and reach position 2 and comeback the same. Please, help me to select the proper interpolation and Independent variable. Thank you for your valuable time... Fig. 1 Fig. 2 Fig. 3 .
  3. Hi all, I am trying to run a multibody simulation in Motionview. However, I am getting an error which I have never seen before and hence, cannot guess what to do. A snapshot of the error is attached. It goes like "No Element found at line 9". However, my simulation is only with rigid body with contacts, joints etc defined. Has anyone ever experienced such an error? If, yes can you please help me to solve the problem! Any help would be appreciated and thanks in advance!
  4. Hi techs! I've created a Ball & Beam model on MotionView to explore a co-simulation with Activate. Many of you may have seen this on undergraduate/master class studying on frequency or even on time domain. I've decided to do something different, creating the model on a multibody environment. The control is a simple PD, where I've calculated using analytical method (Kp +Kd.s) with a specified overshoot and settling time. You could explore changing its values... I'd like to thank @Livio Mariano for suggesting me his own low-pass filter in a way to filter the input displacement signal (without it I was having a problem to converge). I've created a short video to show you how it works, and the files are attached. Enjoy! João. Ball_&_beam.zip
  5. Hi, can Non Linear Finite Elements (based on Absolute Nodal Coordinate Formulation or ANCF) be created with Hypermesh preprocessor?
  6. Hi to everybody, i would like to perform a fatigue analysis using this method: -run the dynamic analysis in Motionsolve in order to extract the load spectrum -run the fatigue analysis in Optistruct using that load spectrum the problem is that the dynamic analysis needs 150000 seconds, and this means an enormous amount of time in Motion solve,it's almost impossible. So is there any other way i can perform this type of analysis? Thank you.
  7. There are node limitations in hypermesh student edition. So what are the limitation in motion view student edition?
  8. Hello, i am a graduate student in ITU Aeronautical Engineering(IDP). i am preparing my thesis. The issue of my Thesis is Flexible multibody analysis of a Landing Gear of a Training Plane. When i analysed the system, i need to compare the results with real test datas. i couldnt achive tests, because of time constraints and very expensive. i think that the closest results can be explicit dynmaic analysis. when i arrenged the explicit dynmaics model and run. i saw there arent any correlation between flex mbd and exp. dynamics anylsis in the same boundry conditions. Can you help me to solve this problem. i asked this question to turkish distrubuter, they get rid of me because of thier job jam. Unfortunately my deadline is very strict, i have to deliver the thesis as soon as possible. My all datas ar in the link below. The model, solved files and the video files. https://drive.google.com/open?id=1ftCMNjK_aZi_axSFe0Gx-3Jk6Qe33u00 in this problem when the plane landed, the oleo strut make displacement 160mm. During this action observing stresses on the structure, and the 434 steel's compitability for this work. i will be happy for helping me. Thanks for everything. Best Regards. Yours sincerely.
  9. Hello! I would like to do a full vehicle analysis with the advanced driver (.adl-file). Apparently, I cannot find this option when I'm in Motion View and use the "-> Model -> Assembly Wizzard" command. I tried it with the latest Hyperworks 14 and 2017 version. Does anybody know how to solve this problem? Thanks in advance. Regards, Max
  10. hi, I modeled a gear and want to find out angular velocity of the gear, how to do that,should I include any expression and how to do with that Thank you Simple_50teeth_gear_model.h3d Simple_50teeth_gear_model.mdl
  11. Hello, I am working on model of pressure plate which have axis offset. A shaft passes through it. when pressure applied (in x-y) on the pressure plate due to the offset one side of pressure plate will have more pressure. Which causes rotation on around z axis. As the shaft passes through z-axis. Shaft and pressure plate are bolted. As pressure plate will rotate it will tend to rotate the shaft. I want to find out for particular pressure how munch is torque is generated. please mention method to follow to get torque as an output How to solve this problem Thanks. 
  12. I am working on FSAE model, for my college team, I have come to know about vehicle library via YouTube video here is its URL I cant find the template used in this video in 53:58 named "Direct Actuation Suspension". Where can i get it please? Thanks in advance.
  13. Hello, I am trying to use leaf spring builder in motion view observing tutorial. I have followed each step as given in tutorial. However I am not able to create .mdl file after I hit build button. I have attached .lpf and error logs. Please find attached files and give suggestion where I am committing error. Regards, Pratik test_leaf_1.lpf 4Feb.lpf test_leaf_1.log test_leaf_1.mdl test_leaf_1_pre1.csv test_leaf_1_pre2.csv test_leaf_1_pre3.csv test_leaf_1_pre4.csv test_leaf_1_Temp.log test_leaf_1_Temp.xml
  14. How to build a vehicle custom template in motionview?? We are building three wheeled vehicle with two wheels at the front and one wheel at the rear.
  15. Hello, i am a graduate student in ITU Aeronautical Engineering(IDP). i am preparing my thesis. The issue of my Thesis is Flexible multibody analysis of a Landing Gear of a Training Plane. When i analysed the system, i need to compare the results with real test datas. i couldnt achive tests, because of time constraints and very expensive. i think that the closest results can be explicit dynmaic analysis. when i arrenged the explicit dynmaics model and run. i saw there arent any correlation between flex mbd and exp. dynamics anylsis in the same boundry conditions. Can you help me to solve this problem. i asked this question to turkish distrubuter, they get rid of me because of thier job jam. Unfortunately my deadline is very strict, i have to deliver the thesis as soon as possible. My all datas ar in the link below. The model, solved files and the video files. in this problem when the plane landed, the oleo strut make displacement 160mm. During this action observing stresses on the structure, and the 434 steel's compitability for this work. i will be happy for helping me. Thanks for everything. Best Regards. Yours sincerely.
  16. hello all, i am working on supra model, for my college team, i have come to know about vehicle library via YouTube video of Altair motion solve, where can we download this vehicle library
  17. I am working on some assembly model. There are some components where there is no separate motion it is connected to some parts which is in motion. But I cannot use fix joint to fix that component because it restrict motion. So what is possible solution.
  18. Hi to everybody, after that i stopped a dynamic simulation in MotionSolve i tried to start it again but i found this error: can someone help me please? thank you
  19. Hi, What is the language of "User Subroutines" in MotionSolve? What kind of things that we can do with the user subroutines? Thanks in advance! Best Wishes, Jay
  20. Hello Dear all. I am in need of a quick tip and should be an easy one for the experts in the group. I have attached the image of the mechanism that i am trying to solve. Is a simple inversion of the 4 bar mechanisim- Whit worth Quick Return Mechanism. The DOF are balanced perfectly with combination of the joints . I present the summary of the checker log: Number of (non-ground) Bodies : 7 Number of original Degrees of freedom : 42 Degrees of freedom removed by motions : 1 Degrees of freedom removed by couplers : 0 Degrees of freedom removed by Joints : 41 Degrees of freedom removed by ADV Joints : 0 Total estimated DOF not counting redundant constraints : 0 The Positive Redundant DOF is being removed by the applied velocity of 10 rad/sec. So what is the issue ? 1. I would like to understand the error given by the solver " The Intergrator Failed to proceed after 1.005 Sec " ? Why and how to make it continue. 2. Proper documentation to understand the " Simulation setting "- DSTIFF,VSTIFF, etc....? What are the values ? 2. The tolerance that i need to set for the analysis to continue ? How to decide I am available to have discussion at you best possible time over the forum or I can get in touch with a long call at my mobile. This is an urgent requirement as I have to compare the results with the Hand calcs that our team has done. I hope a reply and assistance at the earliest. Thank you for your time . Please feel to discuss anything regarding Hyperworks ( Except Motion Solve, I am a Noob!). I am an user of altair products for over 5 yrs, is a pleasure to mutually help. Regards Girish +34632975619 QRR.mvw April_13.log
  21. Are available tutorials in order to generate a flexible body model for example of an assembly using component mode synthesiswith frequency content?
  22. Dear All, Both AcuSolve (CFD) and MotionSolve (MBD) Hyperworks Solvers can be coupled, cosimulation is possible. Certain Applications being real time Aerodynamics simulations, Wind turbines, Fuel tank sloshing, Pressure check valve etc. Click here to view the webinar on AcuSolve (CFD) & Motionsolve (MBD) coupling Attached is a tutorial on the same coupling - Pressure check valve. Regards, Kamlesh CFD_MBD.zip
  23. Hi, I'm currently trying to use the FMI-Standard in order to calculate the frequency response of a mechanical System in Matlab/Simulink. This is my current approach: 1. Import a stp-file in Hypermesh, do the meshing and define a material and property (OptiStruct-Solver) 2. Export the Hypermesh-Session as fem-file 3. Create a flexible body in MotionView using FlexPrep and the fem-file from step 2 - Synthesis Type: Craig-Bampton - Cutoff type/value: 15 highest Modes - perform stress and strain recovery 4. Define a torque as input and an angular displacement at the same point as the output, by using SolverVariables and SolverArrays 5. Export the MotionSolve-Model as FMU After defining the necessary environmental variables and importing the FMU in Simulink the simulation works fine, but the frequency response isn't plausible and it seems to be independent of the chosen material in step 1. Can you imagine a possible reason for that? Thank you in advance! The problem seems to be, that the rotational stiffness is infinite, no matter which material I choose, even though the translational stiffness is not infinite. Has anyone of you experienced the same problem so far? Thank you in advance!
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