For design of automotive airbag electronic control units (AB ECU), it is essential to have a validated and reliable finite element (FE) simulation model in place in order to allow already in an early design stage for the accurate prediction of the ECU's structural vibration behavior. A "bottom-up" approach which described in the ASME guide for verification and validation (ASME V&V 10-2006) is applied for the validation of the AB ECU simulation model. The AB ECU is decomposed into different assembly level. Single printed circuit board (PCB) is the lowest elementary component level. In the PCB level simulation and validation, the influence of in-plane pre-stress on PCB's transverse vibration characteristic has been encountered, but it has been found out that the source of the in-plane pre-stress can not be explained by classical beam/plate theory. Analysis and simulation for PCB fixation reveals that the fundamental source of the in-plane pre-stress is structure's geometric nonlinearity.
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机译：对于汽车安全气囊电子控制单元（AB ECU）的设计，必须具有验证和可靠的有限元（FE）仿真模型，以便已经在早期设计阶段进行ECU结构振动的准确预测行为。在验证和验证指南中描述的“自下而上”方法（ASME V＆V 10-2006）应用于AB ECU仿真模型的验证。 AB ECU分解成不同的组装水平。单印刷电路板（PCB）是最低的基本组件电平。在PCB级模拟和验证中，已经遇到了平面内预应力对PCB横向振动特性的影响，但已经发现了在线梁无法解释面内预应力的源/板理论。 PCB固定的分析和仿真揭示了平面内预应力的基本源是结构的几何非线性。
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