7(b)), the ACTMD structure consists of a base, a pivot, a spring, a turntable, and a moving mass block. The frequency of the ACTMD can be adjusted in real-time by moving the mass block at different positions. Through testing, it has been found that ACTMD can significantly suppress ...
37.The torsional vibration damper according to claim 20 further comprising:a coupling arrangement, having a torsional vibration damper unit comprising a damping device with at least one circumferential spring set, a torsion damper input, and a torsion damper output,wherein one of the torsion damper...
The lumped parameter modeling techniques involve representing the drillstring as a mass-spring-damper system. In a lumped system the dependent variables of interest are a function of time only, making it possible to describe the system mathematically using ordinary differential equations thus making the...
Any suitable biasing member may be used, including, but not limited to, a spring. The force to each pad may be provided by any suitable actuation device, including, but not limited to, a device that supplies a fluid under pressure to the pad or to a piston that moves the pad, and a...
the second gear and the front flank 114 of the tooth 102 of the first gear) while negative loads (provided they are less than a torsional preload of the scissor gear), can be passed by the back flank 122 into the scissor gear teeth, through the spring, and into the main gear's hub...
The Effect of Stress Amplitude on the cause of Fatigue Crack Initiation in a Spring Steel. Int. J. Fatigue 1993, 2, 119–131. [Google Scholar] [CrossRef] Wang, B.; Gao, J.; Wang, L.; Zhu, S.; Guan, S. Biocorrosion of coated Mg–Zn–Ca alloy under constant compressive stress ...
With the installation of a torsional vibration damper at the free end of the shaft system, the entire system can be further simplified into a forced two-degree-of-freedom vibration system, as illustrated in Figure 4. Figure 4. Equivalent model of shaft system. The dynamic equations of the ...
In turn, based on motor shaft data (length 700 mm, diameter 10 mm, total mass 2.167 kg) and material (steel) assumptions, ωf is already known from the natural frequency formula of a mass-spring system, where the spring stiffness is assessed for a single-span simply supported beam. ...