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Old Nov 15th 2018, 07:43 AM   #1
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Problem Force Compression at Boom with Luffing Slink & Hoisting Slink

Dear Sir


Sorry for my English, I an from Indonesia.


I have problem to calculate the force compression from the real world that combined tension from luffing slink and hoisting slink (with pulley).

I search a ton of source, only can find both of the calculation separately.

It is only a luffing slink


It is only with Pulley and Hoisting Slink.
http://cbafaculty.org/Dynamics/Chapter%2013.pdf
13-15 (page 15/132)


9 out 10 of my friends that I asked my pictures attach,
have the same answer that both compression force in Hinge A are the same.




And the same case about weight of the pulley system in my 3rd / katrol picture attach.
They sure that the weight of the pulley system is 10 kg (weight of pulley and slink rope is neglected).



For the boom, I believe the force compression in one with hoisting slink and pulley (even all slinks and pulley weight are neglected) is bigger than the one without.

For 3 rd / katrol picture, I believe the weight is not less than 20 kg.


What is your explanation sir?


Thanks for your attention.

Warm Regards,
Herbrata Moeljo
Attached Thumbnails
Problem Force Compression at Boom with Luffing Slink & Hoisting Slink-02.jpg   Problem Force Compression at Boom with Luffing Slink & Hoisting Slink-01.jpg   Problem Force Compression at Boom with Luffing Slink & Hoisting Slink-kattrol.jpg  
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boom, compression, force, hoisting, luffing, problem, slink



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