CAJ | 학술논문

针对限位器在承受冲击载荷过程中存在二次冲击的问题，建立了双限位器冲击隔离系统数学模型，通过分段线性的杜哈梅积分对冲击方程进行了解析求解，并与阶跃速度法的冲击响应结果进行对比，分析限位器参数（刚度比、阻尼比、安装间隙）对冲击响应的影响，讨论了多岛遗传算法在限位器参数优化中的应用。研究结果表明：适当的限位器阻尼可以有效提升隔冲系统的抗冲击能力，但当阻尼较大时，不可用速度阶跃法进行计算；制定合理的优化策略，利用多岛遗传算法可以得到符合冲击要求的限位器最优参数。
침대한위기재승수충격재하과정중존재이차충격적문제，건립료쌍한위기충격격리계통수학모형，통과분단선성적두합매적분대충격방정진행료해석구해，병여계약속도법적충격향응결과진행대비，분석한위기삼수（강도비、조니비、안장간극）대충격향응적영향，토론료다도유전산법재한위기삼수우화중적응용。연구결과표명：괄당적한위기조니가이유효제승격충계통적항충격능력，단당조니교대시，불가용속도계약법진행계산；제정합리적우화책략，이용다도유전산법가이득도부합충격요구적한위기최우삼수。
In order to solve the secondary impact problem of displacement restrictors in the process of enduring impact load,the mathematical model of a shock isolation system with double displacement restrictors was established.The analytical solution for the shock isolation system was obtained by using a piecewise linear Duhamel integral method,and compared with the results by using the step velocity method.Effects of displacement restrictors'parameters (stiffness ratio,damping ratio and assembled clearance)on shock responses were studied and the application of multi-island genetic algorithm in parameter optimization was discussed.The results prove that proper damping ratio of displacement restrictor can provide effective impact resistance to the system,but the equations could not be solved by the step velocity method in large damping ratio condition.Besides,by using multi-island genetic algorithm,the optimal parameters of displacement restrictor can be adjusted to meet shock isolation requirement by proposing reasonable optimization strategy.