Mechanical vibration exciter and torsion test vibration excitation equipment adopting same

Abstract

The invention belongs to the technical field of vibration excitation equipment and aims at providing a mechanical vibration exciter which is simple in structure, convenient to use, large in vibration excitation force and high in test result accuracy and torsion test vibration excitation equipment adopting the vibration exciter. A bottom plate is mounted at the bottom of a support, a side plate is mounted on one side wall of the support, a driving shaft and a driven shaft are mounted on the support, and the driving shaft is in transmission connection with the driven shaft. Vibration excitation blocks are respectively mounted on the driving shaft and the driven shaft, the structures of the two vibration excitation blocks are identical, and the projections of the vibration excitation blocks in the axial direction are fan-shaped. The mechanical vibration exciter is convenient to mount and use, can respectively provide vertical disturbing force and horizontal disturbing force through mounting the vibration exciters in different modes, is large in vibration excitation force, can meet the test requirements of large test foundations and is large in the range of applications. The vibration excitation force of the torsion vibration of the torsion test vibration excitation equipment can reach 6.66 tons and is much larger than the vibration excitation force of an electromagnetic vibration exciter. The two vibration exciters are driven by the same motor and synchronously vibrate, and the test result accuracy is high.

Description

technical field [0001] The invention belongs to the technical field of vibration excitation equipment, in particular to a mechanical vibration exciter and torsion test vibration excitation equipment using the vibration exciter. Background technique [0002] Vibration excitation test is used to test the dynamic characteristics of natural foundation and artificial foundation, and provide dynamic parameters for vibration and vibration isolation design of machine foundation. Vibration often adopts two methods: forced vibration and free vibration. The excitation equipment for forced vibration includes mechanical excitation equipment and electromagnetic excitation equipment. [0003] The excitation frequency band of the electromagnetic exciter is very wide, generally from a few Hz to several thousand Hz. When the excitation equipment is working, the signal generator first generates a sinusoidal signal with a set frequency, and the signal is input into the power amplifier. After t...

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Problems solved by technology

[0005] However, the structure of the electromagnetic exciter is relatively complicated, and it is inconvenient to install during use, and the exciting force is small, generally only tens of kilograms. For large-scale test foundations, the required exciting force cannot be achieved, so it cannot be achieved. The requirements of the test, the scope of use is small

In addition, when performing the torsional vibration test, two exciters need to be installed, which are driven by different motors. Due to the asynchronous transmission, the vibration frequency is inconsistent, resulting in inaccurate test results, and the torsional vibration excitation force is only about 100kg

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