×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Contact US

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

how to include damping in a shock study

how to include damping in a shock study

how to include damping in a shock study

(OP)
Hi All,

I need to perform a shock study that included damping. From all my research, a Response Spectrum Analysis is the study used for shock. I don't see where damping can be included in this study.

Is there another study I can use for shock that would include damping. My customer has given me a Shock Response Spectra (Freq versus peak acceleration) and a damping value.

Thanks for your input.

RE: how to include damping in a shock study

Response spectrum analysis will be the right choice in this case. Damping can be specified in material properties.

RE: how to include damping in a shock study

(OP)
Duh - I now recall seeing this option if I use CQC.

I think I forgot about this because not all my materials have a damping factor specified in the material properties and wanted to globally set it like I did in my random study. It won't be too hard to go in and artificially set them all to 5% which the customer wants.

Thanks for the quick response. My Monday will be much smoother now.

RE: how to include damping in a shock study

Hi. Response spectrum is conservative analysis, which calculate quickly. You use damping for get the level of load. It's analysis not simple how look.
You need to read this article of mr. Irvine:
https://www.vibrationdata.com/tutorials2/srs_intr....
You also can use transient analysis for shock.

RE: how to include damping in a shock study

When it comes to literature, I'd also recommend "Response Spectrum Method in Seismic Analysis and Design of Structures" by A.K. Gupta.

RE: how to include damping in a shock study

I recommend too Christian Lalanne(auth.) - Mechanical Shock_ Mechanical Vibration and Shock Analysis, Volume 2, Second Edition (2009, Wiley-ISTE)
In this book also explayning responce spectrum analysis for shock. The problem is precisely in getting the load. To do this, you need to use another application.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


Resources

Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close