CAJ | 학술논문

曼型干式煤气柜不同于一般空间结构，其动力特性十分复杂，作为研究其频域内风振响应的基础，首先通过建立精细化有限元模型研究其在不同工况下的动力特性；其次，分别计算背景、共振响应振型能量参与系数，并按降序排列，选取结构风振响应的主要模态；最后，通过选取模态进行频域计算并与传统频域计算方法（完全二次振型叠加，CQC法）对比。结果表明：结构自振频率分布密集；动力特性受活塞位置及内部气压影响较大；背景、共振响应振型能量参与系数能准确反映各阶模态能量对响应总能量的贡献程度；通过振型能量参与系数法确定的主要模态进行频域分析具有计算效率高，计算精度可控的优点。
만형간식매기거불동우일반공간결구，기동력특성십분복잡，작위연구기빈역내풍진향응적기출，수선통과건립정세화유한원모형연구기재불동공황하적동력특성；기차，분별계산배경、공진향응진형능량삼여계수，병안강서배렬，선취결구풍진향응적주요모태；최후，통과선취모태진행빈역계산병여전통빈역계산방법（완전이차진형첩가，CQC법）대비。결과표명：결구자진빈솔분포밀집；동력특성수활새위치급내부기압영향교대；배경、공진향응진형능량삼여계수능준학반영각계모태능량대향응총능량적공헌정도；통과진형능량삼여계수법학정적주요모태진행빈역분석구유계산효솔고，계산정도가공적우점。
The dynamic characteristics of a MAN type dry gas storage tank are very complex,they are different from those of ordinary spatial structures.Here,as the basis of its wind-induced response analysis in frequency domain,its dynamic characteristics were analyzed under different working conditions by using the finite element method.Its modes were sorted with order-descending according to the calculation results of mode energy participation factors of background response and resonant response,respectively.Then,the modes with significant contributions to its wind-induced vibration were selected.Finally,the results calculated in frequency domain with a selected modes were compared with those calculated with CQC method.The results showed that the modal frequency distribution of the structure is dense;the location of piston and internal pressure have larger influences on the dynamic characteristics of the gas storage tank;the mode energy participation factors of background response and resonant one can reflect the contributions of different order modes'energy to the total energy of the response;the analysis in frequency domain with the main modes determined using the mode energy participation factors has advantages of higher calculation efficiency and controllable computation accuracy.