Rubber mount is a type of vibration isolator that can absorb vibration and minimize external disturbance. This study proposes an optimization method to design the geometry of a rubber mount to achieve particular stiffness values in two different loading directions. The proposed objective function of the geometry optimization problem is to minimize the error ratios between calculated and target stiffness values in vertical and transverse directions; a weighted sum method is used to combine both error ratios with equal weighting factors. The design variables are the coordinates of some design points which form the cross-section geometry of the rubber mount. A three-dimensional design is then obtained by extrusion of the two-dimensional geometry. Cuckoo search algorithm is used to update the design variables until the objective function value is smaller than a tolerance. Nonlinear finite element analysis is used to estimate the stiffness values of the rubber mount. Both hyperelastic and viscoelastic rubber parameters are numerically identified by fitting to the experimental data. An optimal design of the rubber mount is obtained and prototyped. Experimental tests are performed to validate the design.

橡胶支座是一种隔振器，可以吸收振动并最大限度地减少外部干扰。这项研究提出了一种优化方法来设计橡胶支架的几何形状，以在两个不同的加载方向上实现特定的刚度值。几何优化问题提出的目标函数是在垂直和横向方向上最小化计算和目标刚度值之间的误差比；加权和方法用于将两个误差率与相等的加权因子结合起来。设计变量是一些设计点的坐标，这些设计点形成了橡胶支架的横截面几何形状。然后通过二维几何形状的挤压获得三维设计。Cuckoo 搜索算法用于更新设计变量，直到目标函数值小于容差。非线性有限元分析用于估计橡胶支架的刚度值。超弹性和粘弹性橡胶参数都通过拟合实验数据进行数值识别。获得橡胶支架的最佳设计并制作原型。进行实验测试以验证设计。