根据基础振动弹性半空间理论的最新发展成果,推演出明置基础扭转振动复合集总参数模型.通过采用2种不同底面尺寸的块体模型基础,分别施加初速度使基础发生自由振动,将试验结果与采用明置基础扭转振动复合集总参数模型的计算结果进行比较.研究结果表明:试验结果与计算结果吻合;利用该模型可以容易地计算均质半空间上明置块体基础在扭转扰力作用下任意频率、任意形状(不包括环型)基础的动力响应.%A new torsional composite lumped parameter model ( CLPM ) of surface foundation was established based on the theory of foundation oscillation on a elastic half - space. Free vibration of two different shaped base lumped foundations perturbed by the initial velocity was achieved respectively. Compared the results of experiment with the results of calculation performed with CLPM, they are dosed agreement. The analysis results show that the advantage of CLPM is to compute dynamic response of arbitrarily shaped surface foundations torsionally oscillating on a homogeneous half - space readily. Moreover, all of oscillation frequencies and all foundation base shapes( excluding annular)are included in the analysis.
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