Virtual work Definition and 61 Threads

Hello Just had a quick question for a structures class. When attempting a problem, what's the main difference between applying PVW and PMPE? What would classify a problem in using one over the other? Thanks

I could not understand the Principle of virtual work. Suppose we have two (x,y,t) [at two different points].By principle of least action we will get a trajectory such that it minimize lagrangian. Does the principle of virtual work say that it will vary the path a little but having the same...

rigorous statement of virtual work principle?? in the texts on mechanics the virtual work principle is always stated in 'infitesimal form'. is there a "proper" way to write the principle of virtual work in which we don't leave it in terms of INFINITESIMALS.

i want to throughly understand the principle of virtual work. why this principle was invented? "sum of work done by forces is zero". such a definition is very vague for me. can anyone explain?

Homework Statement anyone guide me step by step how to use virtual work method to calculate all reactions on this beam? thanks Homework Equations The Attempt at a Solution

Hi All! I am new on here so I hope you quality people can help me out:) I have this question and it asks me to solve it using Virtual Work? What is that and how do I apply it to this question: "A slender rod of length L is attached to a collar at B and rests on a portion of a circular...

In reading Feynman's "Lectures on Physics", volume 2 I have a question and have included a scan of a small section from the book. Feynman was a big fan of using the Principle of Virtual Work, but his explanation, as least insofar as how he used it is wanting, at least for me. The attached...

How do you go about solving an indeterminate beam for various deflections by virtual work? I'm kind of at a loss right now and can't proceed on my homework. I've attached a picture showing the problem I'm confused on - I don't know how to go about modeling the virtual model so I can find the...

Homework Statement Im having real trouble with drawing diagrams for virtual work. Can someone please, please help me! We were asked, in the diagram i posted, to find 1)vertical reaction at F, 2) all reactions at A, 3) bending moment and shear force at B using virtual work. i think i...

I was just reading the Feynman Lectures on Physics when Feynman discussed virtual work. Unfortunately, I found his explanation somewhat confusing. The following are the three examples Feynman uses in order to illustrate the principle of virtual work. 1. 2. 3. I'm trying to...

what is the principle of virtual work. In what circumstances this can be used to solve statics problems?