nastran

Good morning. I have been struggling with a pattern for several days that I can't achieve. I have already developed the model with the czm technique (cohesive zone modeling) and now I am trying with the vcct (virtual crack closure technique) in patran nastran, always using the sol400. I have to...

hi to everyone, from a few days I've been trying to solve a problem using patran-nastran but I don't understand how to do it. the problem is just this: strength ratio in a random patran-nastran analysis. are at the basic level therefore I ask you forgiveness for any banality. I did a random...

Hello everyone, I'm a new member. I am an aerospace engineering student, and I am struggling with a project with nastran patran. Unfortunately I have been stuck for a long time because of continuous software errors. I'll explain better. I often perform an analysis, find results, and at the next...

Hello, everyone, I need some tips... . I have no fe modeler, and I need to transfer inputs both fem and geometric that can be read by nastran (so basically .dat file and/or .bdf file). use ansys workbench 18.2. I managed to export the mesh to .bdf exporting the result file to .stl and...

Good morning, in my exploration of patran-nastran I am trying to solve a problem that seems complex, I wanted to ask if someone can help me and understand if this problem is solved. I am trying to shape a bullet that pierces an aluminum plate; I used a sol400 and set an elasto-plastic material...

Hello everyone, I did an analysis with patran, setting only a thermal load on my model. the analysis goes well and I have the measures related to the deformation of the structure under the heat load. I would like to start from this data and then start a structural analysis in which I go to put...

Hello I have a problem that I can't solve I have tried in many ways, I give you help kindly because I don't know what to try anymore. the problem and banal, I have two audiences one from 3mm and one from 2mm. are attacked by two bolt m5 8.8 nominal preload 6500n. I have to apply the preload. I...

Hello, everyone. I'm here for a problem with msc.random. the .f06 file brings me the following error: user fatal message 4405 (prtprn) no eigenvectors computed for component mode synthesis or system solution. job created by patran random Could someone suggest a solution? my frequency...

Good evening to all and here I am again here to ted you. . I have to conduct an analysis of structures subjected to shock loads..I enclose in the following the performance of inertial forces according to the frequencies (blue line). we are talking about dynamic analysis.. but what exactly? It's...