Rotary Wing Aircraft Power Frame Curved Beam Vibration Control
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Solution Overview
Problem
Existing rotary wing aircraft frames lack sufficient mechanical strength in multiple dimensions while maintaining low weight and cost-effectiveness, and are prone to flexing and vibration, which can affect the stability and performance of the aircraft.
Innovation Solution
A power frame with a curved beam structure formed from resilient materials, secured by couplings with tabs and recesses, and supported by interconnecting elements that apply compressive forces to reduce flexing and vibration, enhancing mechanical strength without significant weight addition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional straight beam structures are used in rotary wing aircraft frames, then the frame can be simpler and lighter, but the mechanical strength and resistance to flexing and vibration are insufficient
Solution Approach 1:
The patent applies curved beam structures instead of straight beams in the rotary wing aircraft frame. The curved geometry provides enhanced mechanical strength and resistance to flexing and vibration while maintaining structural efficiency. The curvature allows the beam to better distribute stresses and resist bending moments, solving the contradiction between strength and weight by achieving higher strength-to-weight ratio through geometric optimization rather than material quantity.
2Stability of the object's composition
If curved beam structures with couplings are used to enhance strength, then mechanical strength and stability improve, but the device complexity increases
Solution Approach 1:
The frame structure is divided into modular components including curved beams, couplings with tabs and recesses, and interconnecting elements. This segmentation allows for standardized manufacturing of individual components that can be assembled using common tools. The modular design reduces overall complexity by breaking down the complex curved structure into manageable, interchangeable parts that simplify both manufacturing and maintenance.
Solution Approach 2:
The coupling mechanism employs nested geometric features where tabs on one component fit into recesses on another component. This nesting arrangement provides secure mechanical connection while maintaining a compact overall structure. The interconnecting elements are designed to nest within the frame structure, reducing protruding elements and simplifying the external geometry despite the internal complexity of the curved beams.
3Reliability
If resilient materials are used for curved beams, then flexibility and vibration resistance improve, but manufacturing precision requirements increase
Solution Approach 1:
The patent utilizes resilient materials for the curved beams that can elastically deform to absorb vibrations and stresses during operation. This parameter change in material selection provides inherent vibration resistance and reliability. The resilient properties allow the structure to accommodate manufacturing tolerances and assembly variations without compromising performance, as the material's elasticity compensates for minor dimensional deviations.
Solution Approach 2:
The frame structure employs composite construction combining curved beams made from resilient materials with rigid coupling elements. This composite approach allows the resilient beams to handle dynamic loads and vibrations while the rigid couplings provide precise geometric relationships and positioning. The combination of different material properties enables the structure to meet both vibration resistance and manufacturing precision requirements simultaneously.
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 provides enhanced mechanical strength in multiple dimensions, reduces flexing and vibration, and allows for assembly with common tools, thereby improving the structural stability and performance of rotary wing aircraft while maintaining cost-effectiveness.
Implementation Method 1
A curved beam extends between a first and a second end and having a lower and an upper edge. A coupling secures the lower and an upper edge of the curved beam to the power frame lower element and the power frame upper element for stabilizing the power frame to reduce flexing and vibration of the power frame.
Data Source
AI summary
An improved frame is disclosed for a rotary wing aircraft comprising a power frame having a power frame lower element and a power frame upper element. A curved beam extends between a first and a second end and having a lower and an upper edge. A coupling secures the lower and an upper edge of the curved beam to the power frame lower element and the power frame upper element for stabilizing the power frame to reduce flexing and vibration of the power frame.