×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Are you an
Engineering professional?
Join Eng-Tips Forums!
• Talk With Other Members
• Be Notified Of Responses
• Keyword Search
Favorite Forums
• Automated Signatures
• 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.

Jobs

(OP)
Hi,
I am deaing with a beam having a reaction moment in the middle of the beam. Beam is simply supported. Assumption is that the load have a cosine distribution with a running load w = (pi*2 x M)/L*2 x 2 [lb/in].

do you have a reaction moment in the middle of the beam (ie a point moment) or a distributed load (capable of both tension and compression) ? i visualise the latter as like a tube over your beam, moment being applied to the tube, the tube applying load to both sides of the beam, the couple is applied as contact forces).

FWIW, i'd use a linear distribution to apply moment.

also you "cosine" definition is incomplete, you need the phase angle ... is the peak load at the middle (that sounds odd, but that's what i think of as a cosine dist'n, modelling the 1st and 4th quadrants) or is minimium load at the middle (sounds more realistic for a moment loading, but sounds more like a sine dist'n, modelling the 1st and 4th quadrants; of course exactly the same as cosine 1st and 2nd quadrants) ?

Quando Omni Flunkus Moritati

(OP)
Thank you rb1957, I am trying to absorb what you have said, and I just got another answer for the cosine distribution in the Mechanicak section (I promise, I won't post it twice anymore - I am new to the forum) which make sense!

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.

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:

• Talk To Other Members
• Notification Of Responses To Questions
• Favorite Forums One Click Access
• Keyword Search Of All Posts, And More...

Register now while it's still free!