的径向的电位移是半径的线性函数。
The radial electric displacement is a linear function with radius.
其中，对于位移插值函数，令其多项式基比孔隙水压力的高一阶，而径向基阶数二者相同。
This method uses one-rank higher polynomial interpolation for displacement than that for pore water pressure, but the rank of radial basis for them is the same.
第二步是以车轮的质量为目标函数，以车轮的应力、径向及横向位移为约束函数，以车轮辐板形状为设计变量进行设计。
The second step is taking the mass of wheel as target function. The stress, radial and cross displacement of wheel as restrain function, the spoke profile of wheel as design variable.
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