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为减少电子产品因实物跌落碰撞试验造成的成本浪费并提高产品结构的可靠性,以手持式监视器外壳塑件为研究对象,基于Creo软件建立4组不同圆角、壁厚的三维模型,以ANSYS/LS-DYNA为仿真平台,分别进行自由跌落模拟试验。结果表明:4组结构中的两组圆角处的最大应力分别超过了屈服应力31.5%和14.0%;结构优化后的最大应力为189.466 MPa,比优化前降低了36.8%。根据仿真结果,3D打印出经过优化的实体模型进行实物跌落试验,结果显示,优化后监视器外壳跌落时发生的变形与仿真结果基本一致。
In order to reduce the cost waste and improve the reliability of the product structure due to the drop test of electronic products, four sets of three-dimensional models with different fillet and wall thickness were built based on Creo software with the hand-held monitor housing plastic parts as the research object ANSYS / LS-DYNA as a simulation platform, respectively, free fall simulation test. The results show that the maximum stress of two groups of fillets in the four groups exceeds the yield stress by 31.5% and 14.0% respectively. The maximum stress after structural optimization is 189.466 MPa, which is 36.8% lower than that before optimization. According to the simulation results, the physical model of 3D was printed and optimized for physical drop test. The results show that the deformation of the monitor shell after falling is basically consistent with the simulation results.