Two-stage air floatation type vibration reduction high-low temperature chamber accompanying system

Abstract

The invention discloses a two-stage air floatation type vibration reduction high-low temperature chamber accompanying system. The accompanying system comprises a primary vibration reduction device, asecondary vibration isolation air floatation support frame, a secondary vibration reduction device, a test pillar and a high-low temperature chamber shell, wherein the primary vibration reduction device comprises a primary vibration reduction air spring unit and a primary vibration reduction rigid platform arranged on the primary vibration reduction air spring unit; the secondary vibration reduction device comprises a secondary vibration reduction air spring unit arranged on the secondary vibration isolation air floatation support frame and a secondary vibration isolation air floatation platform top plate arranged on the secondary vibration reduction air spring unit; the secondary vibration isolation air floatation support frame is arranged on the primary vibration reduction rigid platform; the test pillar is arranged on the secondary vibration isolation air floatation platform top plate; and the high-low temperature chamber shell is arranged on the primary vibration reduction rigid platform for sealing the secondary vibration isolation air floatation support frame, the secondary vibration reduction device and the test pillar.

Description

technical field [0001] The invention relates to the field of vibration control, in particular to a two-stage air flotation vibration damping high and low temperature box accompanying system. Background technique [0002] At present, in view of the vibration impact of high and low temperature boxes, the main measures are to avoid (stay away from) the vibration source or adopt large-volume foundation vibration isolation. Changes are difficult to control effectively. The main disadvantages of traditional methods are as follows: [0003] 1) Low vibration isolation efficiency. The vibration source input of the high and low temperature box includes vibration equipment such as motors with high frequency and background vibration such as construction and personnel walking in the distance with low frequency. Vibration response, and may even cause resonance, so its vibration isolation efficiency is not ideal. Moreover, the damping of large-volume concrete is relatively small, and t...

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Problems solved by technology

[0003] 1) Low vibration isolation efficiency

The vibration source input of the high and low temperature box includes vibration equipment such as motors with high frequency and background vibration such as construction and people walking in the distance with low frequency. Vibrational response, may even cause resonance, so its vibration isolation efficiency is not ideal

Moreover, the damping of large-volume concrete is relatively small, and the energy-absorbing capacity is weak. When the high-low temperature chamber is calibrated or the speed-type specimen is tested, the vibration isolation efficiency of the large-volume concrete vibration isolation foundation cannot meet the requirements.

[0004] 2) Long construction period

The large-volume foundation construction process is complicated, the construction is difficult, and the temperature and stress of the large-volume concrete are not well controlled, resulting in a long construction period for vibration isolation of the large-volume foundation.

During the construction of mass concrete, the heat inside the concrete is not as fast as the heat on the surface, resulting in an excessive temperature difference between the inside and outside, and the temperature stress generated by it may crack the concrete. Therefore, the construction of mass concrete vibration isolation foundations with higher performance requirements The process, temperature control, concrete curing, etc. are relatively complicated, which leads to a significant increase in the construction period. The construction period of large-volume concrete generally takes 2-3 months

[0005] 3) High economic cost

The construction, temperature control, crack control and maintenance technology of mass concrete foundation are relatively complicated, so the project budget is also relatively high

In addition, since the vibration isolation effect of the mass concrete foundation is not ideal, if the vibration response of the high and low temperature box is still not up to standard after the construction is completed, it will cause a lot of waste

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