A complex spring's structural analysis

[EN1986]

TL;DR

Hello, I am trying to figure out what is the force in each spring in the structure after the external force is exerted in its specific location (not in the edges).
I would like to know how can I solve this problem methodically - starting with understanding which springs are serially connected or in parallel given the external force location. Pay attention that we have 4 springs in the left branch and one spring in the right branch.

Hello, I am trying to figure out what is the force in each spring in the structure after the external force is exerted in its specific location (not in the edges).
I would like to know how can I solve this problem methodically - starting with understanding which springs are serially connected or in parallel given the external force location. Pay attention that we have 4 springs in the left branch and one spring in the right branch.

 

[anuttarasammyak]

For my interest what Pet stands for and what role does it play ？

 

[Lnewqban]

Welcome!
I am afraid that would need to provide much more information about this problem.
Is the horizontal distance between the points of application of the forces and the bolt irrelevant?
Are springs a-b-c-d and Kb under similar load?
Are springs a and d under any compression load?

 

[EN1986]

For my interest what Pet stands for and what role does it play ？

This is taken from the article attached below, and it means the external load that a bolted joint is subjected to. This load tries to seperate the bolted members.
Link: https://www.google.com/url?sa=t&sou...wQFnoECA8QAQ&usg=AOvVaw1F5L5XXZEp7rwUlHr0Z9OJ

Welcome!
I am afraid that would need to provide much more information about this problem.
Is the horizontal distance between the points of application of the forces and the bolt irrelevant?
Are springs a-b-c-d and Kb under similar load?
Are springs a and d under any compression load?

I think the horizontal distance doesn't matter.
I think Springs a-b-c-d and kb aren't equally loaded, and this is basically the asked question - how to solve this problem and what are the correct assumptions.
Springs a,b,c,d are initially (before Pet is exerted) in a compression state and kb is initially in an extension state.

 

[jrmichler]

The paper linked in Post #4 is a good discussion of bolted joints for a person with a background in the subject. It's not so good to learn about bolted joints. Search terms theory of bolted joints found this good hit: https://www.boltscience.com/pages/basics1.htm. The Wikipedia article at https://en.wikipedia.org/wiki/Bolted_joint is a good overview, but not as good an introduction as the boltscience article. There are many other good hits, but I suggest seriously studying the boltscience article before looking at them.