176
Z. Liu et al.
Table 14.1 Main properties
of the material
Material Elastic modulus
[MPa]
Poisson’s ratio Density [kg/m 3 ]
Q345R 2.09 × 10 8
0.3
7850
Fig. 14.2 Finite element
grid model of the tube trailer
mass is 28755 kg with the net weight being 25,500 kg and the loading capacity being
3255 kg.
The material used in the equipment is Q345R, and its main properties are listed
in the Table 14.1.
Element Solid186 is used to mesh the model. The grid is hexahedral with mostly
a size of 50 mm after performing irrelevant testing. The whole grid model is shown
in Fig. 14.2.
For the boundary conditions, the four corner supports at the bottom of the frame
are fully restrained for each analysis.
It should be pointed out that there are stresses at the tubes due to internal pressure,
but this paper mainly concerns the strength of trailer frames which is not affected by
the pressure. So the pressure inside the tubes is not considered in this analysis.
14.4 Modal Analysis
Performing modal analysis, the natural frequency results of the first 9 orders are
obtained and listed in Table 14.2.
Tire 12R22.5PR is widely used in tube trailers manufactured in China. According
to “GB/T 2977-2016 specifications, size, pressure and load of truck tires”, the
diameter of the tire is 1085 mm.
Based on Eq. (14.1):
Z. Liu et al.
Table 14.1 Main properties
of the material
Material Elastic modulus
[MPa]
Poisson’s ratio Density [kg/m 3 ]
Q345R 2.09 × 10 8
0.3
7850
Fig. 14.2 Finite element
grid model of the tube trailer
mass is 28755 kg with the net weight being 25,500 kg and the loading capacity being
3255 kg.
The material used in the equipment is Q345R, and its main properties are listed
in the Table 14.1.
Element Solid186 is used to mesh the model. The grid is hexahedral with mostly
a size of 50 mm after performing irrelevant testing. The whole grid model is shown
in Fig. 14.2.
For the boundary conditions, the four corner supports at the bottom of the frame
are fully restrained for each analysis.
It should be pointed out that there are stresses at the tubes due to internal pressure,
but this paper mainly concerns the strength of trailer frames which is not affected by
the pressure. So the pressure inside the tubes is not considered in this analysis.
14.4 Modal Analysis
Performing modal analysis, the natural frequency results of the first 9 orders are
obtained and listed in Table 14.2.
Tire 12R22.5PR is widely used in tube trailers manufactured in China. According
to “GB/T 2977-2016 specifications, size, pressure and load of truck tires”, the
diameter of the tire is 1085 mm.
Based on Eq. (14.1):