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1 Φεβ 2021 · The interaction between structures and walking humans is an important factor in vibration serviceability assessment of slender, lightweight, and low-damping structures. When on bridges humans form a human-structure system and interact with the structural vibration.
Critical damping viewed as the minimum value of damping that prevents oscillation is a desirable solution to many vibration problems. Increased damping implies more energy dissipation, and more phase lag in the response of a system. Reduced damping means more oscillation, which is often undesirable.
Outline. Damped Oscillations in Terms of Undamped Natural Modes. Space-State Formulation & Analysis of Viscous Damped Systems. Assume that the damping mechanism can be described by a viscous, quadratic, dissipation function in the generalized velocities. 1.
1 Φεβ 2021 · The interaction between structures and walking humans is an important factor in vibration serviceability assessment of slender, lightweight, and low-damping structures.
Viscous damping is damping that is proportional to the velocity of the system. That is, the faster the mass is moving, the more damping force is resisting that motion. Fluids like air or water generate viscous drag forces.
27 Μαΐ 2024 · Figure 13.5: Examples of underdamped, overdamped and critically damped free vibrations. For overdamped and critically damped vibrations, different initial conditions are shown for the same ratio \(c / m_{A}\).
The damping may be quite small, but eventually the mass comes to rest. If the damping constant is \(b = \sqrt{4mk}\), the system is said to be critically damped , as in curve (\(b\)). An example of a critically damped system is the shock absorbers in a car.
