INVESTIGASI EKSPERIMEN BEBAN SLAMMING DAN INTERNAL STRAIN PADA BURITAN KAPAL : PENGARUH MATERIAL BAJA PADA MODEL KAPAL.

Vessels in their operations are strongly influenced by sea conditions, especially the size of the waves. The ship's motion due to waves really needs to be taken into account in the early stages of design. High waves can cause vertical movement at the stern of the ship where when the value is too large it can make the stern of the ship experience slamming. Because of this the ship must have sufficient construction strength to be able to withstand the loads that occur duringconditions slamming. These conditions affect the safety of operations and the strength of the ship's structure. Slamming can also result in notches in the stern plate, buckling and deformation of the supporting members of the stern structure. Damage that often occurs due to slamming is the occurrence of fractures in the structure of the ship. So it is necessary to study further to measure the magnitude of the pressure and internal strain when the ship is slamming, as well as determining the pressure distribution at the stern of the ship through model testing in a towing tank in calm water conditions. To get the desired results, the ship model used during the experiment was equipped with a piezoelectric material and a force sensor to calibrate the pressure and voltage values. The results obtained for every change in the droptest angle, namely at a slope angle of 0.76°, the maximum pressure is 57.382 N/m², the tilt angle is 9.33º, the maximum pressure is 60.599 N/m², the slope angle is 15.36º, the maximum pressure is 76.688. N/m², and a slope angle of 19.25º produces a maximum pressure of 94.921 N/m² contained in sensor 2. A tilt angle of 0.76º results in a maximum internal strain of 12.334, a tilt angle of 9.33º produces a maximum internal strain of 16.088, a tilt angle 15.36º resulted in a maximum internal strain of 21.987, and a tilt angle of 19.25º resulted in a maximum internal strain of 20.915 contained in sensor 6. Based on the experimental results, the pressure andvalues internal strain increased with each increase in the slope angle given in the droptest test. The largest distribution of pressure and internal strain occurs at the bottom of the ship's stern. Where the pressure value increased by an average of 23.89% and internal strain increased by an average of 24.29%.