CAJ | 학술논문

目的：利用计算机仿真技术对CT方舱结构进行模态分析，为方舱结构优化提供指导。方法：利用ANSYS有限元分析平台，以CAD模型为基础，建立CT方舱的结构有限元模型，对模型进行模态分析并研究方舱结构的动力学特性。结果：方舱结构模态避开了底盘系统的固有频率，避免了结构发生整体共振；第3阶和第4阶模态频率与发动机怠速频率接近，容易发生共振；路面不平度激励频率覆盖了舱体前6阶模态频率，建议进一步对CT设备支架采取减振措施。结论：基于有限元基本理论，利用现有的软件平台，可以对方舱舱体结构进行仿真模态分析，分析结果可以为今后方舱结构优化、改善动力学特性提供重要依据。
목적：이용계산궤방진기술대CT방창결구진행모태분석，위방창결구우화제공지도。방법：이용ANSYS유한원분석평태，이CAD모형위기출，건립CT방창적결구유한원모형，대모형진행모태분석병연구방창결구적동역학특성。결과：방창결구모태피개료저반계통적고유빈솔，피면료결구발생정체공진；제3계화제4계모태빈솔여발동궤태속빈솔접근，용역발생공진；로면불평도격려빈솔복개료창체전6계모태빈솔，건의진일보대CT설비지가채취감진조시。결론：기우유한원기본이론，이용현유적연건평태，가이대방창창체결구진행방진모태분석，분석결과가이위금후방창결구우화、개선동역학특성제공중요의거。
To perform modal analysis of CT shelter by applying computer simulation technology so as to pro-vide theoretical guidance for CT shelter structure optimization. Based on CAD model, the finite element model of a CT shelter was established with ANSYS simulation platform. Through modal analysis, different-order modal frequency and modal shape of the shelter were computed and the kinetic characteristics were evaluated. Low order modal frequency was kept away from the natural frequency range of chassis system resonance to avoid the overall structure reso-nance; the 3rd and the 4th modal frequency and engine idle speed frequency were very close so that local resonance might occur; road roughness excitation frequency covered the first 6 order modal frequencies and the further vibration-re-ducing measures of CT equipment were suggested. Based on the theories of finite element method and current software platform, modal analysis of shelter structure can be simulated and the results can provide valuable data for the improvement of kinetic characteristics and structure design.