Figure 8
The figure is a line drawing with a side view of a rectangular test rig at the top and two circular wheel diagrams at the bottom. In the top view, a large frame labeled “A 1-3” spans the width, with inner boxes near each end labeled “R, A 1-2” on the left and “L, A 1-1” on the right. Small filled circles labeled “M 1-7” at the left vertical line, “M 1-2”, “M 1-1”, and “M 1-3” mark measurement points near the right box and along the right vertical line of the frame. To the right of the frame, three small tripod-like stands each carry a point labeled “M 1-4”, “M 1-5”, and “M 1-8”, and one point is labeled “M 1-6” just below “M 1-8”. At the bottom, two circles represent the “right wheel” and “left wheel”. Inside the right wheel, two labeled points, “M 1-9” and “M 1-10” appear near the rim on opposite sides, with “R” written above the circle. Inside the left wheel, two labeled points, “M 1-1” and “M 1-2” are shown in similar positions, with “L” written above this circle.Schematic diagram of the layout of noise and vibration measuring points on the wheel–rail test bench. Source: Authors’ own work