Vibration-Isolating Platform With Tuned Wire Rope Isolators
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Solution Overview
Problem
Traditional wooden crates fail to adequately protect fragile objects from damage during transit due to inadequate vibration isolation, as they often amplify vibrations by transmitting and amplifying damaging frequencies, particularly in the 10-60 Hz range, which can cause resonance and damage to objects like paintings and sculptures.
Innovation Solution
A vibration-isolating system comprising a platform suspended by tuned wire rope isolators and an adjustable load-positioning system, which centers the payload at the center of gravity and tunes the suspension to impede specific vibration frequencies, raising the natural frequency of the payload above its fundamental damage frequency to prevent resonance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If traditional wooden crates with foam cushioning are used, then the structure is simple and easy to manufacture, but the vibration isolation performance is insufficient and may amplify damaging vibrations
Solution Approach 1:
The patent introduces wire rope isolators as intermediary elements between the crate structure and the payload. These isolators act as mediators that selectively filter and attenuate vibration frequencies, particularly blocking the 10-60 Hz range that traditional foam cannot effectively address. The isolators transfer only acceptable vibrations to the payload while absorbing harmful frequencies.
Solution Approach 2:
The patent changes the physical parameters of the vibration isolation system by using wire rope isolators with specific natural frequencies (e.g., 5 Hz, 10 Hz, 15 Hz) rather than relying on foam with fixed damping properties. By tuning the isolators to specific frequencies and positioning them strategically, the system transforms from passive cushioning to active frequency-selective isolation.
2Object-affected harmful factors
If wire rope isolators are used to impede vibrations, then the vibration isolation performance is improved, but the device complexity increases
Solution Approach 1:
The patent divides the vibration isolation function into multiple independent wire rope isolators positioned at different locations within the crate (e.g., corners, midpoints of sides). Each isolator operates independently with its own natural frequency characteristics, allowing the system to address multiple vibration modes simultaneously while maintaining modular simplicity.
Solution Approach 2:
The wire rope isolators serve multiple functions: they act as vibration filters, structural support elements, and shock absorbers. This multi-functionality reduces the need for separate components for each function, thereby limiting the increase in overall device complexity despite the advanced isolation performance.
3Object-affected harmful factors
If the isolators are tuned to specific frequencies, then the protection against resonance is improved, but the adaptability to different payload masses is reduced
Solution Approach 1:
The patent employs adjustable wire rope isolators that can have their natural frequencies modified based on payload mass. The isolators can be reconfigured or replaced to match the specific vibration characteristics of different payloads, allowing the system to maintain optimal resonance protection across varying load conditions rather than being fixed to a single frequency.
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 system effectively reduces exposure to damaging vibrations, providing tunable protection from shock and vibration, thereby minimizing the risk of damage to fragile objects during transit by dampening and isolating vibrations, and absorbing shock in case of drops.
Implementation Method 1
The isolators are tuned to impede vibrations in a pre-determined frequency range for a payload having a pre-determined mass
Implementation Method 2
raising the natural frequency of the payload above its fundamental damage frequency to prevent resonance
Implementation Method 3
The adjustable load-positioning system is adapted to facilitate positioning the one or more loads such that the payload having the pre-determined mass is centered at the center of gravity of the platform
Implementation Method 4
absorbing shock in case of drops
Data Source
AI summary
According to certain embodiments, a vibration-isolating system comprises a platform adapted to carry one or more loads and an adjustable load-positioning system. The platform is suspended within a support structure by a plurality of isolators. The isolators are tuned to impede vibrations in a pre-determined frequency range for a payload having a pre-determined mass. The adjustable load-positioning system is adapted to facilitate positioning the one or more loads such that the payload having the pre-determined mass is centered at the center of gravity of the platform.