某国产化加固计算机主板抗振性分析与改进

文中针对某国产化加固计算机在振动试验后主板板载内存产生应力损伤的问题，应用仿真软件对机箱结构和主板安装结构进行了应变、应力分析，得出了机箱和主板在随机振动和冲击激励下的响应数值。针对主板的应变、应力分析结果，提出了理论校核方法。通过对比分析机箱和主板安装结构在不同约束条件下的仿真结果，根据仿真数值与理论限制之间的校核结论，结合主板安装结构形式，给出了针对性的改进措施。试验验证表明，改进后的结构形式对主板的刚性固定效果较好，解决了设备主板在振动试验后出现应力损伤的问题，提高了主板的抗振性能，可为类似设备的主板安装结构设计提供参考。

Analysis and Improvement of Vibration Resistance of a Home-made Ruggedized Computer Motherboard

In response to the stress damage problem caused by the onboard memory of a home-made ruggedized computer after vibration test, the strain and stress of the chassis structure and motherboard installation structure are analyzed by simulation software and the response values of the chassis and motherboard under random vibration and impact excitation are obtained in this paper. A theoretical verification method is proposed for the strain and stress analysis results of the motherboard. Combined with the motherboard installation structure form, corresponding improvement measures are proposed for the chassis and motherboard installation structure by comparing and analyzing the simulation results of the chassis and motherboard installation structure under different constraint conditions and the verification conclusion between simulation values and theoretical limitations. The experimental verification shows that the improved structural form has a good effect on the rigid fixation of the motherboard and thus can solve the stress damage problem of the motherboard after vibration test and improve the anti-vibration performance of the motherboard. It can be used as a design reference for the installation structure of similar equipment motherboards.