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门座起重机矩形拉杆绕流数值模拟分析

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Indexed by:期刊论文

Date of Publication:2010-04-20

Journal:起重运输机械

Included Journals:ISTIC

Issue:4

Page Number:36-40

ISSN No.:1001-0785

Key Words:门座起重机;矩形拉杆;顺风向孔;旋涡脱落

Abstract:当风载作用于门座起重机矩形拉杆时,旋涡脱落频率将会接近于其本身固有频率,此时拉杆会发生涡激共振,剧烈的振动会引起拉杆的疲劳开裂.为了改善振动情况,通常在拉杆顺风向上开孔,使拉杆的脱落频率远离固有频率,以破坏涡激共振形成的条件.为了研究拉杆上孔的尺寸和分布对改善拉杆振动的影响,对不同拉杆模型进行了研究,得出孔的最优尺寸和分布.

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