Compared to the mesh-based finite element modeling, the lumped-network modeling is more useful for the multi-physical system and the simulation of many design variants. A non-uniform discretization of the seat surface into planar multi-patches is introduced for reproducing beneficial features of FEM by a lumped-network approach. These multi-patches are individually attached to the seat frame by visco-elastic polyurethane (PU) foam elements, which can handle the strain rate effect and the hysteresis. This approach is a mimicking the FEM concept while keeping the computational robustness of the Modelica solution.

中文翻译：

---

集总网络模型中的车辆座椅建模以模拟乘坐舒适性

与基于网格的有限元建模相比，集总网络建模对于多物理系统和许多设计变体的仿真更为有用。引入了将座椅表面非均匀离散成平面多面体的方法，以通过集总网络方法重现FEM的有益特征。这些多面膜通过粘弹性聚氨酯（PU）泡沫元件分别连接到座椅框架，可以处理应变率效应和滞后现象。这种方法在保留Modelica解决方案的计算健壮性的同时，模仿了FEM概念。