3D Double-Friction Pendulum Bearing With Adjustable Vertical Stiffness
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Solution Overview
Problem
Current vibration isolation bearings, such as laminated rubber bearings, have natural vibration periods that change with the mass of the upper structure, affecting their vibration isolation performance and lack effective vertical vibration isolation capabilities, which is inadequate for various environmental conditions.
Innovation Solution
A double-friction pendulum three-dimensional vibration isolation bearing with a large vertical bearing capacity and adjustable vertical stiffness, featuring a vertical vibration isolation unit with a concave spherical sliding surface and elastic support members, allowing for adjustable cross-sectional area and enhanced vibration isolation across different vibration environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a vertical vibration isolation unit is arranged in the sliding block with limited installation space, then the bearing capacity can be increased, but the cross-sectional area is limited which restricts the adjustable range of bearing capacity
Solution Approach 1:
The patent transitions from horizontal arrangement to vertical arrangement of the vibration isolation unit, utilizing the vertical dimension within the sliding block. This allows the unit to extend vertically between the upper and lower sliding surfaces, effectively using the limited horizontal footprint while maximizing vertical bearing capacity and adjustability through height variation.
Solution Approach 2:
The patent enables adjustment of the vertical bearing capacity by changing the height or cross-sectional area parameters of the vibration isolation unit. By making these dimensional parameters adjustable, the bearing capacity can be optimized for different vibration isolation requirements while fitting within the constrained installation space.
2Ease of manufacture
If the cross-sectional area of the vertical vibration isolation unit is limited by installation space, then the unit can fit within the bearing structure, but the bearing capacity cannot be sufficiently increased
Solution Approach 1:
The patent introduces adjustable parameters for the vibration isolation unit, allowing the bearing capacity to be dynamically adapted to different application requirements. This adjustability enables optimization of both the installation space utilization and bearing capacity without fixed constraints.
3Device complexity
If commonly used vibration isolation bearings are used, then the structure is simple, but the natural vibration period changes with upper structure mass which affects isolation performance
Solution Approach 1:
The patent introduces adjustable parameters in the vibration isolation unit that allow optimization of the natural vibration period independent of the upper structure mass. By adjusting the stiffness or mass parameters of the isolation unit, the natural period can be tuned to maintain effective vibration isolation performance across different building masses and conditions.
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 improved vertical vibration isolation and support capabilities, allowing for adjustable bearing capacity to meet diverse vibration requirements, reducing the natural vibration period and enhancing the versatility and practicality of the bearing system.
Implementation Method 1
The first support plate has a lower end surface as a first sliding friction surface. The first sliding friction surface is a concave spherical surface. The second support plate has an upper end surface as a second sliding friction surface. The second sliding friction surface is a concave spherical surface.
Implementation Method 2
The elastic support member is disposed between the first connecting plate and the second connecting plate
Data Source
AI summary
A double-friction pendulum three-dimensional vibration isolation bearing (1), includes a first support plate (10), a second support plate (20), a vertical vibration isolation unit, a first sliding end portion (40) and a second sliding end portion (50). At least one of the first support plate (10) and the second support plate (20) is movable. The vertical vibration isolation unit is disposed between the first support plate (10) and the second support plate (20).