曼型干式煤气柜动力特性分析及风振响应主要贡献模态识别

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振动与冲击 ›› 2015, Vol. 34 ›› Issue (19) : 76-83.

论文

李正良1，2，刘欣鹏1，晏致涛1，2，焦红伟1，俞登科1

作者信息 +

Analysis of Dynamic Characteristic and Identification of Natural Modes with Significant Contributions to Wind-induced Vibration of MAN Type Dry Gas Storage Tank

LI Zheng-liang1,2，LIU Xin-peng1，YAN Zhi-tao1，2，JIAO Hong-wei1，YU Deng-ke1

Author information +

文章历史 +

摘要

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，因此作为研究其频域内风振响应的基础，本文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。

Abstract

The dynamic characteristic of MAN type dry gas storage tank is very complex, which is different from ordinary spatial structure. Therefore, as the basis of analysis of the wind-induced response in the frequency domain for the gas storage tank, the dynamic characteristics of which are analyzed under different working conditions by using the finite element software. The modes are sorted descendingly according to the calculation results of mode energy participation factors of background response and the resonate response respectively. And then the natural modes with significant contributions to wind-induced vibration are elected. Finally, the result which is analyzed in frequency domain through elected modes is compare with the one calculated by CQC method. It is found that the natural frequency of the structure is dense. The location of piston and internal pressure are very important elements of affecting the dynamic characteristic of the gas storage tank. The mode energy participation factors of background and resonant response can reflect the contributions of different order mode energy to total energy of response. The analysis in frequency domain through the modes elected by mode energy participation factor method has the advantages of high efficiency and controlled accuracy.

导出引用

李正良1，2，刘欣鹏1，晏致涛1，2，焦红伟1，俞登科1. 曼型干式煤气柜动力特性分析及风振响应主要贡献模态识别[J]. 振动与冲击, 2015, 34(19): 76-83

LI Zheng-liang1,2，LIU Xin-peng1，YAN Zhi-tao1，2，JIAO Hong-wei1，YU Deng-ke1. Analysis of Dynamic Characteristic and Identification of Natural Modes with Significant Contributions to Wind-induced Vibration of MAN Type Dry Gas Storage Tank[J]. Journal of Vibration and Shock, 2015, 34(19): 76-83

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