Tubular Driveline Shaft With Array Tuned Absorber
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Solution Overview
Problem
Traditional vibration dampers in vehicle drivelines are not easily tunable to specific frequencies and often introduce additional resonances due to cantilevered masses, making them inefficient in controlling vibrations across various driveline systems.
Innovation Solution
The implementation of a tubular member with a mounting base and resonator members, constructed from multiple layers (metal and resin) that absorb vibrational energy by converting it into heat or sound, allowing for adjustable resonance frequencies without additional degrees of freedom.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If traditional dampers with cantilevered mass members are used, then vibration damping is achieved, but additional degrees of freedom are introduced creating new resonances
Solution Approach 1:
The patent removes the cantilevered mass member from the damper structure, extracting the source of additional degrees of freedom and new resonances while retaining the core vibration damping function through the mass member positioned between fixing members
Solution Approach 2:
The damper is segmented into distinct functional components: fixing members that provide structural support, a mass member that provides the primary damping function, and connecting members that transmit forces. This segmentation allows each component to perform its specific function without introducing unwanted resonances
2Object-affected harmful factors
If traditional dampers are designed for specific frequencies, then vibration control is achieved, but extensive redesign is required for different driveline systems
Solution Approach 1:
The damper incorporates adjustable elements including the position of the mass member between fixing members, the configuration of connecting members, and the properties of damping elements. These dynamic adjustments allow the resonant frequency to be tuned to match different driveline vibration frequencies without requiring complete redesign
Solution Approach 2:
The patent utilizes adjustable parameters such as the mass of the mass member, the stiffness of connecting members, and the damping coefficients of damping elements. By changing these parameters, the damper can be adapted to control vibrations at different frequencies across various driveline systems
3Object-affected harmful factors
If multiple mass members are added to traditional dampers, then damping capacity is increased, but device complexity increases
Solution Approach 1:
The damper employs composite construction combining a mass member, elastic connecting members, and damping elements within a compact structure. This composite approach achieves high damping capacity through the synergistic interaction of different materials and components rather than simply adding more mass members
Solution Approach 2:
The damper structure nests multiple functional elements within a compact configuration: the mass member is positioned between fixing members, with connecting members and damping elements integrated into the same space. This nested arrangement achieves high damping capacity without proportionally increasing overall device complexity
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
This solution effectively reduces vibration amplitudes and shifts resonance frequencies, improving the stability and efficiency of driveline systems by dissipating energy without contributing to further vibrational effects.
Implementation Method 1
a plurality of resonator members each having a first end, a second end, and a center portion interposed therebetween coupled to the mounting base and extending therefrom
Implementation Method 2
constructed from multiple layers (metal and resin) that absorb vibrational energy by converting it into heat or sound
Data Source
AI summary
A vehicle driveline includes a tubular member (62) having an inside surface (64) and an axis, a mounting base (72) coupled to the tubular member (62), and a plurality of resonator members (74) each having a first end (80), a second end (82), and a center portion (84) interposed therebetween coupled to the mounting base and extending therefrom.