Shock Damping Element With Acute Angle Elements
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Solution Overview
Problem
Current shock damping structures for structures experiencing axial and bending vibrations face limitations as they uniformly reduce axial and bending stiffness, which is not suitable for launch vehicles requiring high bending stiffness.
Innovation Solution
A shock damping element with first and second elements extending at an acute angle relative to a central member, allowing for tailored axial and bending stiffness, where the central member rotates perpendicular to the applied force, maintaining bending stiffness while reducing axial stiffness, and optionally incorporating energy absorbing means for enhanced damping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If weak stiffness is introduced to reduce axial vibration, then damping effect is improved, but bending stiffness is weakened
Solution Approach 1:
The solution transitions from a one-dimensional spring element to a two-dimensional circumferential arrangement of elements around a central member. This dimensional change allows the structure to provide damping in the axial direction while maintaining bending stiffness through the circumferential distribution, effectively decoupling the two stiffness requirements.
Solution Approach 2:
The first and second elements are designed to rotate relative to the central member during axial compression or tension. This dynamic movement mechanism allows the structure to absorb axial energy through rotation while the circumferential arrangement of multiple elements maintains overall bending stiffness. The dynamic response enables selective damping without compromising structural rigidity.
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 design allows for independent adjustment of axial and bending stiffness, effectively reducing axial vibration eigenfrequency more than bending vibration eigenfrequency, enhancing damping efficiency while preserving bending stiffness, suitable for use in launch vehicles and other load-bearing applications.
Implementation Method 1
the connection between the first and second elements at an acute angle relative the central member causes the first central member to move perpendicular to the direction of the force, i.e. to rotate along a vertical axis in a circumferential direction
Implementation Method 2
These structures experience both axial and bending vibrations and require some kind of damping arrangement in order to absorb vibrations and shocks
Data Source
Figure 1
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Figure 2b
AI summary
The invention relates to a shock damping element (1) having a closed cross section. The shock damping element (1) comprises a first shock damping structure (2) comprising a multitude of first elements (5), a multitude of second elements (7) and a first central member (8). The first elements (5) and the second elements (7) are located at opposite sides of the first central member (8). The first and second elements (5, 7) extend towards the first central member (8) at a first acute angle (α) relative the first central member (8) and are connected to the first central member (8). The first and second elements (5, 7) extend in a first direction circumferentially.