{"id":393416,"date":"2024-11-09T09:58:21","date_gmt":"2024-11-09T09:58:21","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/mode-is-0-and-circular-beams\/"},"modified":"2024-11-09T15:21:52","modified_gmt":"2024-11-09T15:21:52","slug":"mode-is-0-and-circular-beams","status":"answered","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/mode-is-0-and-circular-beams\/","title":{"rendered":"Mode is 0 and circular beams"},"content":{"rendered":"

<p>Hello everyone.<br>I am calculating the wheel.<br>I used the following contacts:<br>- wheel to the motor shaft – joint revolve body-body<br>- so that the engine does not rotate from the revolve, I attached its paws to the body using – joint general body-body and marked everything free<br>- so that the body on which the engine is located does not rotate, I secured it from below using joint general body-body and secured it along the Z axis (and the hole where it is fixed with bolts is fixed support).<br>Thus, only the wheel rotates and everything else is fixed.<br>There is a frictionless contact between the shaft and the wheel, the wheel is as if put on the shaft.<br>There is a frictionless contact between the engine feet and the housing, but the foot holes are fixed to the housing holes with circular beams (imitation of bolts).<\/p><p><\/p><p>Problems:<br><span class=”HwtZe” lang=”en”><span class=”ryNqvb”>1. I make a static calculation of the rotation of the wheel of a rotational velocity of 1500 RPM, and then I make a modal analysis from the static (presterss), but why does the wheel have a mod of 0???<\/span> <span class=”ryNqvb”>This means that it is not fixed???<\/span> <span class=”ryNqvb”>But it is fixed with joints and stands on the shaft.<\/span> <\/span><\/p><p><\/p><p><span class=”HwtZe” lang=”en”><span class=”ryNqvb”>If I put not a revolution but a fixed joint between the shaft and the wheel, then there is no 0 mode.<\/span> <span class=”ryNqvb”>Maybe the modal analysis does not see the rotation of the rotation velocity of 1500 RPM?<\/span><\/span><\/p><p>1.1. Is it possible to fix one of the bodies from mutual rotation without additional joints when specifying a revolution?<\/p><p>2. I display the results of the circular beam stress but I see 0, in addition, I see an error that the data for the result is incorrect:<\/p><p><\/p><p><span class=”ryNqvb”>Maybe the general joint is in the way?<\/span><\/p><\/p>\n","protected":false},"template":"","class_list":["post-393416","topic","type-topic","status-answered","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t