4.1. FORWARD This chapter is included the experimental aspects that concerned with current work. A description is indicated for a scaled structure fabricated for the case study. An experimental simulation to the deceleration of the fuel tank with varies oil levels is presented with dynamic test using vibration system analysis. Also amounted test to the scaled structure is also indicated in this chapter. 4.2. SCALED STRUCTURE A scaled structure Have been manufactured using sheet metal of 0.5 mm. the dimensions of the fuel tank were obtained by visiting Oil Products Distribution Company in Babylon and obtaining measurements tank type (Serin/Turkish-made) as shown in figure and the table (4-1).
Figure (4-1) :- Fuel tank type (Serin/Turkish-made). Table (4-1):- Dimensions (m) of fuel tank. m Dimensions 11.7 Length of tank 2.33 largest The diameter of the ellipse section 1.87 smaller 0.46 Holes diameter in the top of the tank The structure is scaled by (1/10) factor such that all dimensions were deceleration by this factor as shown in figure (4-2). Figure (4-2 ):- Scaled structure dimensions. The fuel tank is consisting closed elliptical shell. The internal space is divided in two main parts separated by elliptical internal cutter, each part is divided in to three spaces separated to each either by opened interior cutters as shown in figure (4-3). Figure (4-3):- Interior cutters. Cutters help strengthen the tank structure either circular arched opening to have a role in the product passing through the tank. In addition, the tank has a chassis extended to a length (11.70 m). The scaled shell was mounted on four pairs of axial wheels to fabricate a semi simulation of the fuel tank. …show more content…
Also a truck cabin was mounted on a distance (19 cm) than the front side of the shell as shown in figure (4-4).
Figure (4-4):- Scaled structure.
The scaled structure was fabricated using available Galvanis steel. The mechanical properties where obtained using test in the tensile machine as shown and table (4-2).
Table (4-2):- The mechanical properties.
Mechanical properties
158 Mpa Yield stress (σy)
218 Mpa Ultimate stress (σult)
0.27 Poisson's ratio (ν)
27 Gpa Modulus of elasticity (E)
Figure (4-5) shows the details of the test specimen and the tensile test machine.
Figure (4-5):- The specimen and machine test.
4.3. SIMULATION OF SUDDEN ACCELERATION/ DECELERATION OF FUEL TANK A simulation had been designed and manufactured to experimentally predict the behavior of the tank shell with various fuel levels under action of sudden acceleration/deceleration. The simulation idea is subjecting the scaled shell to spring force due to its stretching to some distance then released as shown in figure (4-7). Figure (4-7):- The spiral spring connected with the model. Then it’s required to estimate the required spring stiffness at specified stretching distance that needed to attain tank the specified acceleration that corresponding to each fuel level inside the tank according to Newton’s second law. The required acceleration was experimentally measured through an experiment had been done on the track with full fuel. The track was moved to reach a speed …show more content…
Then its estimated the required stiffness as K= 891 N/m.
4.4. VIBRATION MEASUREMENT The vibration of the tank due to acceleration was measured using experimental vibration system. The experimental vibration system that used is consisting of four accelerometers, vibration analyzer and Lab VIEW
Figure (4-1) :- Fuel tank type (Serin/Turkish-made). Table (4-1):- Dimensions (m) of fuel tank. m Dimensions 11.7 Length of tank 2.33 largest The diameter of the ellipse section 1.87 smaller 0.46 Holes diameter in the top of the tank The structure is scaled by (1/10) factor such that all dimensions were deceleration by this factor as shown in figure (4-2). Figure (4-2 ):- Scaled structure dimensions. The fuel tank is consisting closed elliptical shell. The internal space is divided in two main parts separated by elliptical internal cutter, each part is divided in to three spaces separated to each either by opened interior cutters as shown in figure (4-3). Figure (4-3):- Interior cutters. Cutters help strengthen the tank structure either circular arched opening to have a role in the product passing through the tank. In addition, the tank has a chassis extended to a length (11.70 m). The scaled shell was mounted on four pairs of axial wheels to fabricate a semi simulation of the fuel tank. …show more content…
Also a truck cabin was mounted on a distance (19 cm) than the front side of the shell as shown in figure (4-4).
Figure (4-4):- Scaled structure.
The scaled structure was fabricated using available Galvanis steel. The mechanical properties where obtained using test in the tensile machine as shown and table (4-2).
Table (4-2):- The mechanical properties.
Mechanical properties
158 Mpa Yield stress (σy)
218 Mpa Ultimate stress (σult)
0.27 Poisson's ratio (ν)
27 Gpa Modulus of elasticity (E)
Figure (4-5) shows the details of the test specimen and the tensile test machine.
Figure (4-5):- The specimen and machine test.
4.3. SIMULATION OF SUDDEN ACCELERATION/ DECELERATION OF FUEL TANK A simulation had been designed and manufactured to experimentally predict the behavior of the tank shell with various fuel levels under action of sudden acceleration/deceleration. The simulation idea is subjecting the scaled shell to spring force due to its stretching to some distance then released as shown in figure (4-7). Figure (4-7):- The spiral spring connected with the model. Then it’s required to estimate the required spring stiffness at specified stretching distance that needed to attain tank the specified acceleration that corresponding to each fuel level inside the tank according to Newton’s second law. The required acceleration was experimentally measured through an experiment had been done on the track with full fuel. The track was moved to reach a speed …show more content…
Then its estimated the required stiffness as K= 891 N/m.
4.4. VIBRATION MEASUREMENT The vibration of the tank due to acceleration was measured using experimental vibration system. The experimental vibration system that used is consisting of four accelerometers, vibration analyzer and Lab VIEW