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鉴于复杂振动荷载下地基和土工建筑物动态反应的研究存在一定的困难，因此将 复杂振动荷载分解为球应力振动与偏应力振动进行研究。为了探讨球应力振动下土的 动力特性，研制了球应力振动仪。该仪器可以测出作用在试样上振动球应力的大小， 同时可以测出不排水试样在不同振动球应力作用下孔隙水压力的变化过程。将其结果 与动三轴试验相应的试验结果进行比较，可以获得振动球应力对饱和砂上液化影响的 情况。本仪器制造方便．经过初步试验．证明其性能基本良好．
Due to the difficulties in the study of the dynamic response of foundations and geotechnical structures under complex vibrational loads, the complex vibrational loads are decomposed into the vibration of the ball and the deviatoric vibration. In order to investigate the dynamic properties of the soil under the stress and vibration of the ball, a ball stress and vibration instrument was developed. The instrument can measure the size of the vibration ball acting on the sample, and at the same time can measure the change process of the pore water pressure of the undrained sample under different vibration ball stress. Comparing the results with the test results corresponding to the dynamic triaxial test, it is possible to obtain the effect of the vibration ball stress on the liquefaction on the saturated sand. The instrument is easy to manufacture. After preliminary tests. Prove its performance is basically good.