The airbag is featured with energy conservation and environment protection, reasonable structure and durability. The airbag body is round and smooth and the heads are safe and reliable. Our airbags have been widely used domestically and overseas. The application of airbag has little specific site constraints and it does not large machinery or equipment, thus using airbags to launch or land ships can shorten project period and financially save a large amount. Through over 20 years’ development and practice, airbag has been approved to be safe, effective, eco-friendly, flexible. Now it is widely used in ship launching and landing, caisson and heavy objects lifting and moving, assembling underwater etc.

The bearing capacity of marine airbags was calculated based on the working pressure, contact area. Herein, working pressure was got upon the burst pressure and safety working factor.

Because of the flexibility of marine airbag the contact area will be affected by some terms which include the carried ship condition, the different position from gravity center during the process of ship launching and pulling. So the bearing capacity of airbags will vary as well as the contact area.

The approximate bearing capacity can be calculated as follows:

F=PS

 S=π x (D1-D2)/2

Mark:

F: Bearing capacity

P: Inner pressure

S: Contact area

D1: Diameter of airbags when free of loat

D2: Working height of airbags when loaded