Cherry Pickr Tippng Angle & Potential Energy Req To Tip

In summary, the conversation revolves around the task of de-rating MEWPS (cherry pickers) on board semi-submersible rigs in various sea states. The goal is to simplify the process and determine the potential energy required to tip a cherry picker when the rig rolls and pitches. The poster has provided a document with sketches and figures to explain their thinking and is seeking help from others, specifically regarding the center of mass and its movement outside the base. Another participant in the conversation has provided a response, stating that tipping does not require energy but rather gives off energy. The conversation also includes a mention of a thread on Physics Forums.
  • #1
glocki35
11
0
Hi,

I have been tasked with working out load charts for various MEWPS (or cherry pickers) on board semi-submersible rigs, the iddea is to de-rate these in various sea states the same as an offshore crane, i have tried to simplify this as much as i can, however i am stuck when i try to work out the potential energy required to tip a cherry picker when the rig rolls and pitches (this is not a comprehensive engineering investigation, merely a simplification of what is required), i also would like to work out the inclination or angle required to make the cherry picker tip over.

Can anyone help with this?, i have attached a doc with sketches and figures to try and show you my way of thinking...

Thanks in advance

Glocki 35
 

Attachments

  • Cherry Picker Problem.pdf
    75.7 KB · Views: 298
Engineering news on Phys.org
  • #2
It doesn't take any energy to tip - it gives off energy that's why it happens.
You just need the CoG (technicaly the centre of mass) to move outside the base (ie the wheels) all pitching and rolling of a ship does is to provide the tip
 
  • #3
Hi MGB_phys,

just wanted to say thanks for the reply, much appreciated :)
 

FAQ: Cherry Pickr Tippng Angle & Potential Energy Req To Tip

What is Cherry Pickr Tipping Angle and why is it important?

Cherry Pickr Tipping Angle refers to the angle at which a cherry picker or aerial lift can safely operate without tipping over. It is important because operating at an unsafe angle can lead to accidents and injuries.

How is the Tipping Angle of a cherry picker determined?

The Tipping Angle of a cherry picker is determined by the balance between the weight of the cherry picker and the weight of the load it is carrying. The center of gravity of the cherry picker and its load must stay within the base of the cherry picker to prevent tipping over.

What factors affect the Tipping Angle of a cherry picker?

The weight and distribution of the load, the height of the cherry picker, and the terrain on which it is operating can all affect the Tipping Angle of a cherry picker. Uneven ground, strong winds, or sudden movements of the cherry picker can also impact its stability.

What is Potential Energy and how does it relate to tipping over?

Potential Energy is the energy an object has due to its position or configuration. In the case of a cherry picker, the higher it is raised, the greater its Potential Energy. If the cherry picker is at an unsafe tipping angle, this Potential Energy can cause it to tip over and potentially cause harm.

How can the Potential Energy required to tip a cherry picker be calculated?

The Potential Energy required to tip a cherry picker can be calculated by multiplying the weight of the cherry picker by the height at which it is being operated. This will give you the amount of Potential Energy that must be countered to prevent tipping over. Safety guidelines recommend keeping this Potential Energy below a certain threshold to ensure the stability of the cherry picker.

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