Low-Frequency Vibration Isolation Superstructure for Lightweight Stiffness
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Solution Overview
Problem
Existing vibration-isolating technologies face challenges in miniaturization and lightweight design, and they compromise structural rigidity and strength, especially at low frequencies, which are critical for aerospace applications where vibrations from launch and operation impact sensitive equipment.
Innovation Solution
A low-frequency vibration-isolating superstructure unit comprising an outer protective structure, an inner mass block, and a bending structure, designed to achieve resonance-based vibration isolation, with the superstructure units arranged to form a closed region on a flat plate, optimizing parameters to maximize vibration isolation efficiency and maintain structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If vibration-isolating devices are designed to be miniaturized and lightweight, then the payload capacity is improved, but the shock resistance and structural strength are reduced
Solution Approach 1:
The patent employs composite material structures in the vibration-isolating device, combining materials with different properties to achieve both lightweight characteristics and high shock resistance. The composite structure allows the device to maintain structural integrity under impact loads while keeping the overall weight minimized for payload capacity.
2Object-affected harmful factors
If soft materials are added for vibration isolation, then low-frequency vibration isolation is improved, but the stiffness and strength of spacecraft parts are reduced
Solution Approach 1:
The patent applies vibration isolation measures locally at specific connection points rather than throughout the entire structure. Soft vibration-isolating materials are strategically placed only where needed to reduce vibration transmission, while the majority of the spacecraft structure maintains its original high stiffness and strength characteristics.
Solution Approach 2:
The patent utilizes resonant vibration principles to design the vibration-isolating device, creating a tuned mass damper system that counteracts low-frequency vibrations through controlled resonance. This approach achieves effective vibration isolation without requiring extensive soft materials that would compromise structural stiffness.
3Volume of moving object
If vibration-isolating devices are made compact, then the volume is reduced, but the assembly precision requirement increases
Solution Approach 1:
The patent divides the vibration-isolating device into modular segments that can be independently manufactured and then assembled. This segmentation allows each component to be produced with standard tolerances, and the modular design incorporates self-aligning features that reduce the cumulative effect of manufacturing variations, thereby maintaining compact size while managing assembly precision requirements.
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 achieves effective vibration isolation with a compact, lightweight design that maintains the structural stiffness and strength of the spacecraft, allowing for efficient reflection of bending waves and protection from impact loading, while optimizing the number and placement of superstructure units for enhanced vibration isolation.
Implementation Method 1
designed to achieve resonance-based vibration isolation
Data Source
AI summary
The present disclosure discloses a low-frequency vibration-isolating superstructure unit, a superstructure and a method of designing a superstructure, is capable of solving the problem that it is difficult to meet the requirements of miniaturization and lightening of vibration-isolating devices, and the problem of reduced structural rigidity and strength caused by vibration isolation. The low-frequency vibration-isolating superstructure unit includes: an outer protective structure (1), an inner mass block (2) and a bending structure (3); the outer protective structure (1) is a concave structure and one side with an opening is placed vertically; the inner mass block (2) is arranged on the side of the outer protective structure (1) close to the vertical inner wall, the inner mass block (2) is connected with the bending structure (3) only at the top close to the side with the opening of the concave structure; the bending structure (3) is arranged on the side of the outer protective structure (1) close to the opening, the bending structure (3) includes shaped structures (18) vertically spliced, a top vertical beam (12) and a top transverse beam (13).