Ship Engineering

In order to study the effect on the ship structure during the ship launching by using gasbag, the test has been carried out to investigate the stress change of upper deck and bilge near the midship of 21500 t bulkcargo ship using dynamic strain gauge. The test results were collected by setting in-phase signal and the change of longitudinal obliquity was memorized by goniometer at the same time. The test results indicate that stern’s decline accident happened during the launching by using gasbag, the higher stresses were occurred in the part area of the ship. Measurements such as strengthening the part structures, extending the length of slipway under water, changing the grade of slipway.