Search results for query: *

Hello All, Sorry if this topic has been discussed elsewhere but I have been doing quite a bit of research on this topic and found minimal help. We have a compound thin tube with PTFE liner on the inside and Nylon jacket on the outside. The dimensions are below PTFE thickness- 0.002" Nylon...

Gruntguru, thanks for the response. I was wondering about how should I formulate the engineering problem to determine whether the lifting lug will tear out of the cabinet or otherwise? Your feedback is sincerely appreciated thanks

Desertfox, Thank you for the response. This design is not completely OEM and hence an attempt to validate our design, specifically this lifting problem. Hopefully the linked pictures in the above post and the one in this will provide you a better picture of the problem. Assuming that the...

Thank you all for your responses Drawoh, I have added a better picture that explains how the lifting lug interfaces with the cabinet. Please see below my responses to your comments 1."One of more lugs fail. Assume your load is not equally distributed."- By the way how this cabinet is going to...

Desertfox, thank you for your time in responding to my query. Yes, the lifting lug positions are recommended by the cabinet manufacturer. Also, the lifting cables will be not vertical leading to compression as well as bending of the plate as you have identified. Assuming that the center of...

Also, please note that the top plate is stiffened along the edges with brackets. I am not sure how to consider this bracket's effect on the analysis? please advise

here is another picture of the sectioned cabinet.http://files.engineering.com/getfile.aspx?folder=3033235a-6fb7-4521-b691-ac69157eef99&file=cabinet.PNG

Hello All, I am trying to determine if the cabinet top plate will fail/rupture when lifted using the available 4 lifting eye-bolts. The weight of the cabinet is 1200 lbs and vendor supplied eye bolt has a load capacity of 500 lbs each. I am not sure how to proceed with the analysis? Should I...

Mike and IRstuff, thank you for your input. I have a vendor who fabricates vibration mounts out of Butyl rubber that has higher damping ratio of 0.2 (http://www.avproductsinc.com) which is an option. Also, I will further analyze my cabinet and electronics to determine its strength against 0.7g...

Mike, Thanks for the response. I understand that modifying the fn to fall out of test range will evade the resonance. However, to increase fn beyond 100 Hz I have to increase the stiffness of the mounts more than 2000 times (since mass is constant), which is impractical. To decrease it beyond 2...

attachment#3http://files.engineering.com/getfile.aspx?folder=a036402f-2d9b-4317-ae93-3c3e41de08ad&file=Capture2.PNG

attachment#2http://files.engineering.com/getfile.aspx?folder=b8313928-be74-401d-baca-01de83019a93&file=Capture.PNG

Hello Group, I am working on selection of vibration isolators for one of our electrical cabinets which would be subjected to Sine sweep vibration test from 3 to 100 Hz (1 octave/ min for 2.5 hours) with peak acceleration of 0.7g(see attached pic for test plot).For preliminary analysis, I have...

thanks tunalover. I appreciate the response. I already have the machinery's handbook and surely check out the David S. Steinberg's books you suggested. Best Regards, karthik

drawoh, Thanks for your thoughts. 1,2.First of all, the red things are rubber, and I agree that the setup presented is not an anti-vibration mount as the dampener is screwed onto a collar stud welded to the back panel-- <sigh>. 3. The bolts aka studs are welded to the back panel and thus...

Hello All, I am trying to investigate robust methods of mounting electronic back panel inside an enclosure. The backpanel assembly weighs about 170 pounds and is subjected to 10G shock and vibration testing. In the past, we have used the following method --mounting the panel on the collar studs...

Yes I did. Below are the applicable ones I found 1. Mechanical Analysis of Electronic Packaging systems by McKeown 2. Packaging of Electronic systems- A mechanical Engineer Approach by James W Daily

Gilmiril, Thanks for the response. Now that it is clear that API 17F doesnt have a whole lot of test requirements for the surface equipment, I will try and find other applicable standards that can detail the testing requirements for surface control equipment Thanks karthik

Hello All, I see that the Testing section (section#9)of API 17F standard specifically states below "The following requirements are only applicable to subsea equipment" My question is where can I find the qualification test requirements for the Surface equipment? This is strange because the...

Drawoh, Thanks for the response. I understand that I have to go through the NEMA and other applicable industry standards, but I what I meant to ask was a a text that covers topics like packaging design guidelines, most common mechanical problems encountered during shock and vibe, common chassis...