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Rubber boot-type elastic support block track structure
(1) The technical key points in the experimental research stage (including the proposed technical route and research method) are as follows: a. Rubber boot and damping technical parameters: testing the mechanical physical properties and technical indicators of the damping pad (dynamic and static stiffness, damping) Ratio, fatigue performance, etc.).
b. Using the wheel-rail dynamic analysis model, analyze and compare the vibration-damping effect of the elastic support block track and different fasteners (W J-2 type, DT type, shock absorber fastener).
c. Indoor laying of solid support block track, elastic support block track, damper track, W J-2 type, DTIII fastener, using the drop axis impact method to simulate the wheel and rail effect, indoor comparison test the vibration reduction effect of each track. 137-8585-5258 pay
d. On-site comparison test the vibration and noise reduction effect of the elastic support block track, and test the vibration and noise of the tunnel, the viaduct and the corresponding ground building in the elastic support block section and the support block section.
e. Through the on-site construction exploration and research, develop the laying process of the elastic support block.
(2) Main research contents (including major technical and economic indicators)
a. Study to determine the technical parameters of the rubber boot and damping pad.
b. Study the construction technology of the elastic support block track structure of the rubber boot.
c. Comparison of vibration and noise reduction effects of the track structure of the rubber boot support block.
d. Technical and economic analysis of the track structure of the rubber boot support block.
(3) Evaluation indicators of project products
a. The damping material insulation performance is greater than 106 Ω.
b. Fatigue performance: The stiffness change after less than 3 million fatigue loads is less than 20%.
c. The damping effect is better than the damping effect of the track damper fastener, W J-2 type and DT type.
The vibration/solid-state sound control efficiency of the GERB vibration isolation system is characterized by its low natural frequency (5~7HZ). Under normal circumstances, it is more than other vibration isolation in the high frequency range of 200HZ or in the low frequency range. The board (having a characteristic natural frequency of 10 Hz or more) is further reduced by 10 dB. The loss of sound transmission from the vibration source to the receiver is not only affected by the insertion loss of the floating plate, but also by the distance, the consumption of energy in the soil, the interaction of the soil structure, etc., between different floating plates. The entire difference in insertion loss is passed to the recipient, which just results in a difference in the efficiency of the vibration/solid sound control there. The figure below shows the results of a study conducted by the well-known STUVA organization in Germany. They measured the insertion loss of different floating plates in the same tunnel section and compared it with the standard track boring system. An important conclusion is:
The technical characteristics of the robustness, stability and durability of the track structure are easy to meet, but the environmental protection requirements in terms of vibration reduction and noise reduction need to be researched and improved. It is necessary to carry out a cyclic process of designing to promote scientific research and scientific research to improve the design level. The above-mentioned separable solid spiral steel spring floating plate system, the author believes that it is a track structure system with advanced technical performance, significant vibration isolation effect, and basically can meet environmental protection requirements; and in the case of rail fasteners, whether it is from elastic buckle From the W J-2 type to the Cologne egg (orbital damper), the damping effect is still not ideal. I believe that the rubber boot-type elastic support block track structure is applied to the underground and the above. The elevated rail transit line is a very good innovative technology with broad application prospects. It mainly focuses on the vibration damping application of rubber boots in rail transit engineering. It has carried out a series of indoor simulation tests, on-site comparison tests, on-site construction exploration, etc. It is expected to make the vibration reduction effect better than DT type and W J-2 type. The effect of the Cologne egg (orbital damper).
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Cold Ramming Paste refers to a cathode paste that can be laid at room temperature. It is a carbon-filled raw material for masonry. It is widely used in industrial furnaces such as aluminum reduction cells, iron-making blast furnaces, smelting furnaces, and calcium carbide furnaces. The aggregate of this cathode paste is the same as that of ordinary cathode paste (also called hot stamping paste), such as ordinary calcined anthracite or electric calcined anthracite, Metallurgical Coke, graphite scrap, etc.
Carbon paste, cold ramming paste
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