基于颗粒阻尼的PCB动力学与电路联合设计研究

Research on joint design of dynamics and circuit for pcb based on particle damping

对PCB在运输与使用过程中受振动影响易产生故障的问题,提出一种新型的电路板动力学与电路联合设计方法,能在满足电路设计的前提下,提高它的抗振特性。基于PCB的动力学分析,确定电路板的模态敏感区域,结合谐响应分析确定阻尼器的安装位置。通过离散单元法计算颗粒系统的耗能,针对颗粒阻尼器模型的设计,进行颗粒粒径大小、填充率等参数的优化,并确定颗粒阻尼器在PCB上的安装方案,在此基础上完成整个电路体系的设计。通过仿真与试验相结合,验证敏感区域安装颗粒阻尼器能使得PCB减振效果达到50%以上。这种联合设计的方法,对于提高电路板的抗振特性具有重要意义。

A new joint design method of dynamics and circuit for PCB was presented,which can improve the anti-vibration performance of PCB on the premise of satisfying the circuit design,in order to solve the problem that the vibration of PCB is easily affected by vibration in the process of transportation and use.Firstly,based on the dynamic analysis of PCB,the modal sensitive region of the circuit board was determined,and the mounting position of the damper was determined by the harmonic response analysis.Then the energy dissipation of the particle system was calculated by the discrete element method.According to the design of the particle damper model,the particle size,filling rate and other parameters were optimized,and the installation scheme of the particle damper on the PCB was determined.On this basis,the design of the whole circuit system was completed.Through the combination of simulation and experiment,it was verified that the installation of particle damper in sensitive areas can increase the vibration reduction effect of PCB more than 50%.This joint design method is of great significance for improving the anti-vibration characteristics of the circuit board.