Recent Content by Ali Golshani

  1. Ali Golshani
    Post

    Horsepower requirement of the tugboat towing the pipeline

    Hi, would you please answer below question as this is very important for us. I know that you might be busy. "For Fs, could you please show me the...
    Post by: Ali Golshani, Dec 21, 2017 in forum: Boat Design
  2. Ali Golshani
    Post

    Horsepower requirement of the tugboat towing the pipeline

    Thanks.
    Post by: Ali Golshani, Dec 20, 2017 in forum: Boat Design
  3. Ali Golshani
    Post

    Horsepower requirement of the tugboat towing the pipeline

    Thanks. Do you have any reference for Cd=1 and also Cr=1 which you have considered in your calculation?
    Post by: Ali Golshani, Dec 17, 2017 in forum: Boat Design
  4. Ali Golshani
    Post

    Horsepower requirement of the tugboat towing the pipeline

    Hi and thanks for reply. These ballasts are fixed to the pipe and exist every 45m and their function is keeping the balance of pipes against...
    Post by: Ali Golshani, Dec 17, 2017 in forum: Boat Design
  5. Ali Golshani
    Post

    Horsepower requirement of the tugboat towing the pipeline

    Hi, I am trying to understand your calculation. 1. I think lamdba is 0.009 not 0.09. Would you plz confirm it? 2. For Fs, could you plz show me...
    Post by: Ali Golshani, Dec 17, 2017 in forum: Boat Design
  6. Ali Golshani
    Thread

    Calculation of drag forces for concrete ballasts in towing operation

    Hi All, Due to the existing balance concrete ballasts, the drag force between concrete ballast and water in towing operation should be calculated....
    Thread by: Ali Golshani, Dec 10, 2017, 0 replies, in forum: Boat Design
  7. Ali Golshani
    Post

    Horsepower requirement of the tugboat towing the pipeline

    Hi and thanks for the reply. Due to existing balance concrete ballasts, the drag force between concrete ballast and water in towing operation...
    Post by: Ali Golshani, Dec 9, 2017 in forum: Boat Design
  8. Ali Golshani
    Post

    Horsepower requirement of the tugboat towing the pipeline

    Thanks a lot.
    Post by: Ali Golshani, Nov 13, 2017 in forum: Boat Design
  9. Ali Golshani
    Post

    Horsepower requirement of the tugboat towing the pipeline

    No, it is Tugboat. Thanks
    Post by: Ali Golshani, Nov 13, 2017 in forum: Boat Design
  10. Ali Golshani
    Post

    Horsepower requirement of the tugboat towing the pipeline

    [ATTACH] Hi all, does above paragraph work for me?
    Post by: Ali Golshani, Nov 13, 2017 in forum: Boat Design
  11. Ali Golshani
    Post

    Horsepower requirement of the tugboat towing the pipeline

    Thanks for kind reply. The pipe is floated therefore only a small portion of it is in touch with water. Do you have any example of your...
    Post by: Ali Golshani, Nov 11, 2017 in forum: Boat Design
  12. Ali Golshani
    Post

    Horsepower requirement of the tugboat towing the pipeline

    We have calculated the forces. They are about 10 ton. Wave height is 1.5 m, current is 1 m/s and the pipes will be moved about 2 km. How can we...
    Post by: Ali Golshani, Nov 11, 2017 in forum: Boat Design
  13. Ali Golshani
    Post

    Horsepower requirement of the tugboat towing the pipeline

    Thank you, yes they are floating.
    Post by: Ali Golshani, Nov 11, 2017 in forum: Boat Design
  14. Ali Golshani
    Post

    Horsepower requirement of the tugboat towing the pipeline

    Hi and thanks for your answer. Some of the specifications are: SM/1515, Internal Diameter: 2.5m, External Diameter: 2.752m, Thickness: 126mm,...
    Post by: Ali Golshani, Nov 11, 2017 in forum: Boat Design