FEA For a Water Tank

  • #1
Hi,

I'm trying to do some stress analysis on a tank filled with water, I have split the walls into sections and applied the appropriate pressures. However, I'm confused as to whether I apply the weight of the water+pressure at that height difference to the bottom of the plate; or will the pressure account for the weight already? But this doesn't seem likely as the formula didn't include mass.

Thank you.
 

Attachments

Answers and Replies

  • #3
stockzahn
Homework Helper
Gold Member
498
136
Hi,

I'm trying to do some stress analysis on a tank filled with water, I have split the walls into sections and applied the appropriate pressures. However, I'm confused as to whether I apply the weight of the water+pressure at that height difference to the bottom of the plate; or will the pressure account for the weight already? But this doesn't seem likely as the formula didn't include mass.

Thank you.
Assume a tank with an area of the bottom 1 m2 and a height of 1 m filled with water. The weight of the contained water then would be 1 m3 of water multiplied with its density ##\rho##, hence 1000 kg corresponding to 9810 N.

Now let's calculate the pressure due to the water: ##p=\rho g h = 1000 \cdot 9.81 \cdot 1 = 9810\;N/m^2##. The force on an area of 1 m2 then is 9810 N, which is exactly the force due to the weight of the water. To find a total pressure at the bottom of course one has to add the atmospheric pressure at the water surface.
 
  • #4
20,869
4,546
Assume a tank with an area of the bottom 1 m2 and a height of 1 m filled with water. The weight of the contained water then would be 1 m3 of water multiplied with its density ##\rho##, hence 1000 kg corresponding to 9810 N.

Now let's calculate the pressure due to the water: ##p=\rho g h = 1000 \cdot 9.81 \cdot 1 = 9810\;N/m^2##. The force on an area of 1 m2 then is 9810 N, which is exactly the force due to the weight of the water. To find a total pressure at the bottom of course one has to add the atmospheric pressure at the water surface.
The atmospheric pressure doesn't have to be included if you're working with gauge pressures. Otherwise, you need to include the air pressure contribution from the outside of the tank as well.
 

Related Threads on FEA For a Water Tank

  • Last Post
Replies
10
Views
5K
Replies
1
Views
6K
  • Last Post
Replies
2
Views
7K
  • Last Post
Replies
3
Views
6K
Replies
3
Views
8K
  • Last Post
Replies
2
Views
5K
Replies
3
Views
1K
  • Last Post
Replies
2
Views
6K
Replies
1
Views
2K
  • Last Post
Replies
1
Views
8K
Top