Transport stability of SPMT module car 6-axis car plate

SPMT modular trucks are mainly used in the transportation of heavy and super-large structures. They have the advantages of large load capacity and flexible movement. They are mainly used in the transportation of heavy and super-large structures. It is widely used in engineering fields such as petroleum, chemical industry and bridge construction. Under normal circumstances, before SPMT operation, the PPU, 6-axis car plate, and 4-axis car plate need to be spliced longitudinally and horizontally, and after forming a car group, large parts are transported, and the design method of evenly grouping points is adopted. In some special cases, it is necessary to use a 6-axis carriage to connect the PPU for transportation. At this time, due to the action of PPU, the car board will tend to tilt longitudinally around a certain axis. For example, a 6-axis car board is divided into points according to the 3-3-3-3 method, and the car board exists around the 5th axis. vertical tilt trend.

Stability analysis process of China SPMT transportation

By establishing the stability calculation model of the 6-axis deck of the SPMT module car, the relationship between the weaving method and the load position of the cargo is analyzed.

Calculation of stability of 6-axis car board of self-propelled modular trailer

Assuming that the ground is basically flat, the component of pressure along the ground direction is ignored, and only the vertical component is considered. The points are grouped according to the rectangular four-point support, the number of the central axis of the group A/B is n, and the number of the central axis of the group C/D is 6-n, and n is 1, 2, 3, 4, and 5. Figure 1 is a schematic diagram of the point grouping when n=3.

Take the frontmost position of the upper surface of the SPMT car board as the coordinate origin, and establish the coordinate system as shown in Figure 2. Among them, the reaction force of the ground facing the axis of group A/B is P1, the reaction force of the ground facing the axis of group C/D is P2, the distance between the cargo weight G and the front end of the vehicle board is L, the weight of PPU is f1, the center of gravity of PPU and the vehicle are The distance from the rear edge of the board is L'. The self-weight of the car plate converted to each axis is f=3.9 t, and the distance between the car plate axes is 1.4 m.