Reciprocating Dynamic Damper for Beam Vibration Cancellation
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Solution Overview
Problem
Movement of loads over structures like beams or bridges generates dynamic vibrations that can weaken or damage the structure and affect equipment performance, with existing methods failing to effectively counteract these vibrations.
Innovation Solution
A dynamic damper system with flexible supports, torsional springs, and a dynamic linear spring mass damper that moves reciprocally to generate vibrations 180 degrees out of phase with the initial vibrations, using accelerometers and a microcontroller to adjust speed and travel distance for optimal damping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a moving load traverses the beam, then the beam experiences dynamic vibrations, but the vibrations can weaken or damage the structure and adversely impact equipment performance
Solution Approach 1:
The dynamic damper applies a counteracting force in advance to offset the harmful vibrations caused by the moving load. The damper is positioned and activated to generate forces that are opposite in phase to the beam's vibrations, thereby reducing the net vibrational force before it can cause damage to the structure or equipment.
2Object-affected harmful factors
If a dynamic damper is used to counteract vibrations, then vibration damage is reduced, but the device complexity increases
Solution Approach 1:
The damper system employs dynamic components including a reciprocating mass that moves along the beam and adjustable spring constants. The system transitions from static to dynamic operation, where the damper mass reciprocates in response to beam vibrations, and the spring constants can be adjusted based on operating conditions. This dynamic approach allows effective vibration counteraction while maintaining reasonable system complexity through adaptive rather than purely mechanical designs.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Effectively dampens vibrations by generating counteracting vibrations, reducing structural damage and improving equipment performance.
Implementation Method 1
The travel of the dynamic linear spring mass damper is configured to generate second vibrations in the beam which are 180 degrees out of phase with the first vibrations
Implementation Method 2
a first flexible support connected to the beam beneath the first end, wherein the first flexible support has a linear spring constant, kl, and a second flexible support connected to the beam beneath the first end and the second end, wherein the second flexible support has the linear spring constant, kl
Data Source
AI summary
A dynamic damper system, method, and non-transitory computer readable medium for damping vibrations in a beam structure. The dynamic damper system includes a beam with a first and a second fixed end having a width and a thickness; a first and a second flexible support, each having a spring constant kl connected to the beam beneath the first and the second end, respectively; a first and a second torsional spring, each having a spring constant kθ connected to the first and the second end, respectively; a moving load configured to traverse the beam reciprocally between the ends and generate first vibrations in the beam; and a dynamic linear spring mass damper connected to the beam is configured to travel reciprocally between the ends and generate second vibrations in the beam which are 180 degrees out of phase with the first vibrations in the beam generated by the moving load.