JMZ-T Rubber Vibration Damping Sandwich Mounts
The JMZ-T series rubber sandwich mountsis the new designed model, which is designed especially for the military use. Comparing with the wire rope isolators, this model is small and tinny, which has no worrying about the space limits.
The max static load of the JMZ-T Series anti vibration rubber sandwich mounts is from 1.4 kg to 2.8 kg, which can be specially used in a good deal of precision equipment and system in helicopter, motor, embedded electronics, etc.
The JMZ-T Series vibration damping sandwich mountscan also be used in the very narrow spaces to meet the mountable environmental requirements. This new type friction damper is the very selection for the limits of the space under some special situations.
An earthquake is caused by the motion of the ground which causes the forced vibration of a building that is still at rest on the ground, resulting in internal forces, deformation and displacement in the structure. Vibrational isolation is an isolated earthquake, To isolate or dissipate vibration energy by setting a control mechanism at the base or at a certain location of buildings and structures to avoid or reduce the transmission of vibration energy to the upper structure, reduced the vibration response of the structure, so that only minor motion and deformation of the building can be realized during the earthquake to ensure the safety of buildings. In isolation technology, foundation isolation technology is a hot new technology in the world. The base isolation technology is widely used, it is especially suitable for medium-and low-rise brick-concrete buildings and reinforced concrete buildings.
What is the basic vibration isolation technology
Traditional vibration isolation structure mainly utilizes plastic deformation and energy dissipation of the main structure to dissipate vibration energy after yielding，therefore, the performance requirements of these regions are particularly important. Once these areas have problems due to certain factors, it will affect the vibration resistance of the structure seriously, even produce serious damage. And the foundation isolation is to set a layer of isolation with sufficient reliability between the superstructure of the building and the top of the foundation to separate the superstructure from the foundation, and blocks the propagation of vibration waves to the superstructure, so that the vibration energy of the input structure is absorbed by the energy dissipation elements of the isolation layer, therefore, it will reduce the vibration response of the superstructure greatly, so that ensure the safety of the building.
The basic principle of base isolation technology
According to the experiment, if the period of the structure is prolonged and a large damping is given, it will greatly reduce the acceleration response on the structure. At the same time, large displacements to the structure can be provided by an isolation layer between the bottom of the upper structure and the top of the foundation. In this way, the superstructure will move close to translation during the earthquake, so the safety degree of the superstructure is greatly improved, which is the principle of base isolation. It is shown in the curve of the structural reaction spectrum below. From the acceleration response spectrum of figure (a), we can see that the acceleration response of the structure decreases with the prolongation of the period, so that the inertia force acting on the structure is reduced; but from the displacement response spectrum of (b), the period is prolonged and the displacement response is increased. If a damping device is introduced into the structure, the displacement response of the structure can be reduced, and the corresponding acceleration response can also be reduced.
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