Shipborne resonant column instrument

Abstract

The invention relates to a shipborne resonant column instrument which is composed of torsional vibrating electromagnetic driving devices, a longitudinal vibration device, a balancing base and a detection device, wherein four torsional vibrating magnets respectively arranged in four driving coils are respectively fixed at four end points of a right-cross-shaped swing arm through screws, the four driving coils are respectively arranged in four coil sleeves, and the four driving coils are respectively connected with a power supply through cables so as to form four sets of torsional vibrating electromagnetic driving devices; the four sets of torsional vibrating electromagnetic driving devices are respectively fixed on a supporting inner cylinder at equal angles. According to the invention, a problem that the test accuracy of an existing resonant column instrument is affected by the swinging of an experimental bench is solved, so that the resonant column instrument which is widely applied to geotechnical tests can be applied to sea exploration vessels, and can be used for timely detecting and analyzing collected sediment samples, and therefore, the collected sediment samples are not required to be taken to a land laboratory to be detected and analyzed. In such a way, carrying and storage are omitted, and manpower, material resources and time are saved.

Description

Technical field: [0001] The invention relates to a device for timely measuring shear wave (S) and longitudinal wave (P) wave speeds of collected sediment samples in marine resource exploration, especially a device suitable for timely measuring sediment wave speeds on exploration ships. Background technique: [0002] The theoretical basis of the resonant column test is the wave propagation theory in the soil - the wave theory. Apply torsional or axial vibration force on the soil sample and change the vibration frequency until the resonance frequency of the system is measured. Then calculate the dynamic parameters of the test piece according to the resonant frequency, the geometric size of the test piece, and the limit conditions of the end. [0003] It was the Japanese engineer Iida (1938) who first introduced the resonant column technology into the geotechnical test. Later, Shannon, Yamane and Dietrich (1959), Wilson and Dieter Some new applications of the resonant column ...

AI Technical Summary

Problems solved by technology

Due to the above reasons, the existing resonance column instrument is only suitable for indoor testing and cannot be used for shipboard

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