The replacement foundation modulus was ensured by the method of equivalent-stiffness.
采用等刚度法确定换填基础模量；
The synthesized reload modulus was confirmed by resilience test, plate loading test, and large scale bearing test. The replacement foundation modulus was ensured by the method of equivalent-stiffness.
分别采用室内回弹试验、野外平板载荷试验和堆载试验，综合确定土体的再压缩模量；
Then, an equivalent linearization method is applied to get its linearized stiffness matrix. The estimating method for the equivalent fundamental frequency of the membrane is deduced.
应用等效线性化方法得到方程组的线性化刚度矩阵，给出了结构等效一阶频率的计算方法；
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