The earthquake-resistant problems of important industrial equipment have not yet received enough attention. Most manufacturers of electronics, machinery, and instrumentation generally only consider transportation problems in the packaging state of the equipment, and do not consider the seismic (vibration) problem of the equipment under use.
With the acceleration of the pace of modernization, a large number of high-precision facilities and expensive and complicated industrial equipment and lifeline projects are being built or put into use, such as complex automated production lines, large computer systems, precision instruments and equipment, and power transmission and transformation equipment. In recent years, the seismic capacity of building structures has been significantly improved, and buildings equipped with the equipment generally do not collapse during an earthquake. Some of these devices are installed on the ground and some are installed on the floor. In the event of a devastating earthquake, severe vibration can damage the vulnerable parts of the equipment, lose precision or lose function due to sliding, falling, etc., and thus affect the work of the entire production line and production system. On the other hand, repairing these devices is often difficult, especially for imported equipment without spare parts. This is also evidenced by the earthquake damage of important industrial equipment in the Los Angeles earthquake and the Japanese Hanshin earthquake. Therefore, ensuring the critical equipment of important industrial facilities, the critical parts of lifeline engineering and the seismic safety of other important precision equipment, and preventing the earthquake damage of important industrial equipment are of great significance for disaster relief and restoration of production after the earthquake.
The seismic problem of important industrial facilities can be solved by vibration isolation method, which is to install a shock isolator
between the object and the foundation that needs to be shockproof. The huge seismic wave energy is absorbed and dissipated after passing through the isolator. The earthquake deformation mainly occurs on the isolation device, so that the vibration kinetic energy and seismic deformation transmitted to the isolated object are controlled within the range that the equipment can withstand, and the protection device is not damaged by the strong vibration of the earthquake. According to the same principle, the damper device can be designed with energy-consuming composite materials to absorb the vibration caused by the machine placed on the floor or the ground, so that the vibration transmitted to the floor or the ground is greatly reduced, creating a good working environment.
There have been many successful examples of the application of seismic isolation technology in building structures. For example, New Zealand, the United States, Japan, China, etc. have built a number of buildings using isolation technologies such as lead dampers and laminated rubber mats. It has demonstrated excellent seismic resistance in earthquake practice. Practical experience shows that the isolation technology can reduce the structural design of the building by 1 degree to 2 degrees compared with the traditional seismic design method, and can effectively solve the seismic problem of precision equipment floating on the floor or the countertop. Therefore, countries such as New Zealand, the United States, Japan and Italy have widely used seismic isolation technology as a practical technology in building construction and bridges, and have withstood the earthquake test. Japan, New Zealand and other countries have developed design specifications for seismic isolation technology applied to various structures. Seismic isolation technology has also been used in earthquake resistance of important industrial equipment. Countries such as France and South Africa have adopted isolation technology on the main equipment of nuclear power plants. The construction of nuclear power plants in high-intensity seismic zones and the use of vibration isolation technology to deal with the seismic problems of important industrial equipment have begun to show strong vitality.