Tuned Mass Damper Light Tower Seismic Protection
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Solution Overview
Problem
Large-scale light towers are vulnerable to external vibrations such as earthquakes, which can cause errors and damage to their electric and electronic elements, leading to structural instability and potential breakage.
Innovation Solution
An earthquake-resistant light tower design incorporating a tuned mass damper, where the light device frame or tower head serves as a tuned mass body, supported by a guide and equipped with an oil damper and spring to absorb vibrations, with a friction-reducing mechanism to enhance smooth movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional light tower structure is used, then the structure is simple and easy to manufacture, but it is vulnerable to earthquake vibrations causing structural instability and potential breakage
Solution Approach 1:
The patent merges the light tower's functional components (light device frame or tower head) with the earthquake-resistant function by installing a tuned mass damper system. The damper mass is integrated into the existing structure, combining illumination and seismic protection functions into a unified system rather than adding separate independent structures.
Solution Approach 2:
The tuned mass damper acts as an intermediary element between the earthquake vibrations and the light tower structure. The damper mass absorbs and dissipates seismic energy through controlled movement within guide rails, protecting the main structure from direct vibration damage while maintaining structural simplicity.
2Reliability
If a tuned mass damper is installed to reduce vibration, then earthquake resistance is improved, but the weight and load burden of the tower increases
Solution Approach 1:
The light device frame or tower head serves dual purposes: its primary function of supporting illumination equipment and its secondary function as part of the tuned mass damper system for earthquake resistance. This multi-functionality eliminates the need for separate dedicated mass elements, reducing overall weight addition.
Solution Approach 2:
The existing structural components of the light tower (light device frame or tower head) are utilized to provide earthquake resistance functionality. These components serve themselves by being equipped with guide rails and dampers, transforming ordinary structural elements into active seismic protection mechanisms without requiring entirely new components.
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
The solution significantly reduces the maximum displacement and shear force during earthquakes by up to 75.1% and 31.2% respectively, providing effective protection without adding a separate mass body, thus simplifying the structure and reducing load burden.
Implementation Method 1
an oil damper and a spring radially installed between the guide and the slider and absorbing vibration of the slider by vibration of the tower body
Implementation Method 2
an oil damper and a spring radially installed between the guide and the slider and absorbing vibration of the slider by vibration of the tower body
Implementation Method 3
a friction-reducing mechanism to enhance smooth movement
Data Source
AI summary
The present invention relates to an earthquake-resistant light tower with a tuned mass damper, in which a tuned mass damper is installed in a head part of a light apparatus installed on the top of a tower to absorb an earthquake or other vibration, thereby protecting a tower from vibration.