-
-
April 2, 2022 at 4:14 am
abde1
SubscriberHello..
I want to apply modal analysis for a helicopter blade, i added springs to the blade from connections, so does this springs considered as boundary conditions? also the first frequency result is zero, so is it okay that the first frequency is zero?
thankyou.
April 5, 2022 at 1:34 pmSahil Sura
Ansys Employee
Springs can be used as boundary conditions as they serve an option for connecting two parts or a part to the ground. (You can refer to Springs (ansys.com) for more insights.)
Considering the Modal Analysis of the helicopter blade shown in the attached pictures, using appropriate supports at the respective locations can provide better results. As seen, a missing constraint causing a rigid body motion is leading to rigid body modes (Modes with zero frequency).
Rigid body modes can be expected in certain analysis but in many analysis are considered to be alarming. Thus using proper constraints can resolve the issue if unexpected rigid body modes appear.
Hope that helps Thanks Sahil
Viewing 1 reply thread- You must be logged in to reply to this topic.
Ansys Innovation SpaceEarth Rescue – An Ansys Online Series
The climate crisis is here. But so is the human ingenuity to fight it. Earth Rescue reveals what visionary companies are doing today to engineer radical new ideas in the fight against climate change. Click here to watch the first episode.
Ansys Blog
Subscribe to the Ansys Blog to get great new content about the power of simulation delivered right to your email on a weekly basis. With content from Ansys experts, partners and customers you will learn about product development advances, thought leadership and trends and tips to better use Ansys tools. Sign up here.
Trending discussions- Saving & sharing of Working project files in .wbpz format
- An Unknown error occurred during solution. Check the Solver Output…..
- Understanding Force Convergence Solution Output
- Solver Pivot Warning in Beam Element Model
- Colors and Mesh Display
- How to calculate the residual stress on a coating by Vickers indentation?
- whether have the difference between using contact and target bodies
- What is the difference between bonded contact region and fixed joint
- The solver engine was unable to converge on a solution for the nonlinear problem as constrained.
- User manual
Top Contributors-
2630
-
2104
-
1327
-
1110
-
461
Top Rated Tags© 2023 Copyright ANSYS, Inc. All rights reserved.
Ansys does not support the usage of unauthorized Ansys software. Please visit www.ansys.com to obtain an official distribution.
-