平板垫胶皮对震源振动指标和输出能量影响分析

Vibration indicator and energy output analysis with rubber under the vibrator baseplate

可控震源在施工时首先要保证平板和大地的偶合,平板在压重的作用下和大地一起振动,对地表有一定的损坏,在城区柏油路或水泥路等硬化路面施工时,为了减少对路面损伤,地震队一般会在震源平板下垫(包裹)胶皮。但是垫胶皮会改变平板和大地的偶合状态,不但对震源力产生一定影响,而且会影响能量下传。本文通过等频信号和生产信号试验分析,得出垫胶皮前后各因素变化规律,对地震队开展城区等硬化路面作业时,是否应该垫胶皮提出指导性建议。

When the seismic vibrators operate on the hardening pavement surfaces such as asphalt roads or cement roads,in order to reduce the damage to the road or reduce the complaints of third parties,the seismic operation team generally put(parcel)rubber pad under the vibrator baseplate.However,after putting the rubber pad under the baseplate,the performance(harmonic distortion)and the output energy of the vibrator will be affected.In this paper,we have used constant frequency signals and custom sweep signals for test and data comparison and got the law of changes before and after putting the rubber pad under the baseplate.When the seismic team is working on hardening pavement operations,it has guide opinions on whether it should set rubber pad or not for the seismic crew operate on the hardening avement road.