vibratory$90230$ - definizione. Che cos'è vibratory$90230$
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Cosa (chi) è vibratory$90230$ - definizione

COMPACTOR TYPE ENGINEERING VEHICLE
Roller-compactor; Road Roller; Road rollers; Roadrollers; Vibratory rollers; Roadrollerda
  • Flattened and leveled construction site with road roller in the background
  • Caterpillar]] soil compactor equipped with padfoot drum, being used to compact the ground before placing concrete
  • Antique "Kemna" road roller
  • Rollers compact the asphalt layer. [[Buryatia]], [[Russia]]

Vibratory stress relief         
  • '''''Figure 2:''''' Reverse ring time, or RRT, is the time period between the start of vibration excitation, and full resonant amplitude.<ref>[http://www.vsrtechnology.net/wp-content/uploads/shankar.pdf] S. Shakar, ''Vibratory Stress Relief of Mild Steel Weldments'', PhD Dissertation, Oregon Graduate Center, U. of Oregon, 1982</ref>
  • '''''Figure 1:''''' A waveform that demonstrates ring time, which is the time period vibration continues, after resonant excitation ceases.<ref>[http://www.vsrtechnology.net/wp-content/uploads/walker_waddell_johnston.pdf] C.A. Walker, A.J. Waddell and D.J. Johnston, ''Vibratory Stress Relief - An Investigation of the Underlying Process, Proc. Inst. Mechanical Engineers''., 209, 51-58 (1995)</ref>
  • '''''Figure 3:''''' The effects of scanning at different scan rates: 10 and 50-RPM/sec. Peaks that are scanned too quickly don't have enough time to reach full resonant amplitude, due to the RRT effect. The larger and heavier the structure, the greater the inertia, the longer the ring time (and reverse ring time): Thus, larger, heavier structures might require slower scan rates to plot accurate resonance patterns.
  • '''''Figure 5:''''' Vibratory Stress Relief was performed on this mild steel weldment weighing almost 12 tons. Overall size was 17' × 15' × 2' (≈ 5.2 × 5.6 × 0.6 meters). Workpiece was supported on three, red urethane load cushions (two of which are circled), which are positioned far from the corners of the workpiece to minimize damping, thus promoting resonance, which is required for stress relief to be achieved. The vibrator can be seen in the left, mid-ground (circled), and the accelerometer (vibration sensor whose output is proportional to acceleration), can be seen in the central, left, foreground (circled).
  • '''''Figure 4:''''' VSR Treatment Chart consists of two plots: The upper plot is workpiece acceleration, the lower plot is vibrator input power, simultaneously plotted vertically vs. a common horizontal axis of vibrator speed. Peaks in the acceleration data depict resonances; growth and shifting of the peaks are the response of the workpiece to treatment.
Vibratory Stress Relief (VSR)
Vibratory Stress Relief, often abbreviated VSR, is a non-thermal stress relief method used by the metal working industry to enhance the dimensional stability and mechanical integrity of castings, forgings, and welded components, chiefly for two categories of these metal workpieces:
Vibratory fluidized bed         
Vibratory Fluidized Bed
Vibratory Fluidized Bed (VFB) is a type of fluidized bed where the mechanical vibration enhances the performance of fluidization process. Since the first discovery of vibratory fluidized bed, its vibration properties proves to be more efficient in dealing with fine particles which appears to be very difficult to achieve with normal fluidized bed.
Vibratory shear-enhanced process         
User:Technotofu/VSEP; VSEP; Vibratory shear enhanced process
Vibratory shear enhanced process (VSEP) is a membrane separation technology platform invented in 1987 and patented in 1989 by Dr. J.

Wikipedia

Road roller

A road roller (sometimes called a roller-compactor, or just roller) is a compactor-type engineering vehicle used to compact soil, gravel, concrete, or asphalt in the construction of roads and foundations. Similar rollers are used also at landfills or in agriculture.

Road rollers are frequently referred to as steamrollers, regardless of their method of propulsion.