CAJ | 학술논문

为了研究不同冲击环境下的舰载设备的响应及激励力频率对设备响应的影响，对不同类型和重量设备的响应进行了数值仿真和理论分析。将舰载设备在冲击载荷作用下的受力模型简化为基础激励的多自由度系统，利用虚拟约束边界模态方法建立了不同冲击环境下多自由度系统响应的计算方法，通过系统的频响函数分析激励力频率对设备响应的影响。结果表明：冲击谱参数中谱位移和谱速度对设备响应影响较大，而谱加速度大幅变化对设备响应基本无影响；当激励力频率大于舰载设备中各主要子结构中最高的低阶自由界面模态截断频率的两倍时，可忽略激励力对设备响应的影响。分析结果可对舰载设备在冲击载荷作用下的响应分析及抗冲击评估提供参考。
위료연구불동충격배경하적함재설비적향응급격려력빈솔대설비향응적영향，대불동류형화중량설비적향응진행료수치방진화이론분석。장함재설비재충격재하작용하적수력모형간화위기출격려적다자유도계통，이용허의약속변계모태방법건립료불동충격배경하다자유도계통향응적계산방법，통과계통적빈향함수분석격려력빈솔대설비향응적영향。결과표명：충격보삼수중보위이화보속도대설비향응영향교대，이보가속도대폭변화대설비향응기본무영향；당격려력빈솔대우함재설비중각주요자결구중최고적저계자유계면모태절단빈솔적량배시，가홀략격려력대설비향응적영향。분석결과가대함재설비재충격재하작용하적향응분석급항충격평고제공삼고。
In order to study the response of a shipboard equipment under different shock environment and the effects of exciting frequency on equipment response,the responses of different types equipments with different weights were analyzed using numerical simulation and theoretical analysis.The force-bearing model of the shipboard equipment under impact load was simplified as a multi-DOF system with base excitation.Using the modal method of virtual constraint boundary,a calculation method for the response of the multi-DOF system under different shock environment was established.The effects of exciting frequency on equipment response were studied by analyzing the frequency response function of the system.The results showed that the spectral displacement and spectral velocity have a significant effect on equipment response,but the great changes of spectral acceleration have little influence on equipment response;the effects of exciting force on equipment response are negligible when the exciting frequency is larger than twice the modal truncation frequency for the highest one of lower order free-interface modes.The results provided a reference for response analysis of shipboard equipment under impact load and its impact resistant ability evaluation.