层叠式聚偏氟乙烯主动约束层阻尼与圆柱壳结构的振动控制.pdfVIP

维普资讯 学兔兔 第44卷第3期 机 械 工 程 学 报 v。1．44 No．3 2008年 3月 CHINESE JOURNAL OF MECHANICAL ENGIN EERING Mar． 2 00 8 层叠式聚偏氟乙烯主动约束层阻尼 与圆柱壳结构的振动控制水 张亚红 牛红攀 张希农 谢石林 (西安交通大学强度与振动教育部重点实验室 西安 710049) 摘要：设计一种层叠式聚偏氟乙烯(Polyvinylidene fluoride，PVDF)主动约束层阻尼结构，将其应用于圆柱壳结构，采用Hamilton 变分原理，导出局部附加层叠式PVDF主动约束层阻尼(ALCLD)圆柱壳的振动控制方程。给出层叠式PVDF主动约束层作动 力的解析表达式，对两端简支圆柱壳的振动控制进行模拟。研究表明，层叠式 PVDF主动约束阻尼层结构产生的作动力与 PVDF层数成正比，控制电压相同时，增大主动约束层层数和粘接层厚度，可以有效地增大作动力，显著提高振动抑制效果。 研究发现，粘贴在壳曲面上的主动约束层能够在径向产生大的作动力，这对壳曲面面外的振动控制非常有利。 关键词：圆柱壳 层叠式聚偏氟乙烯主动约束层阻尼 振动控制 中图分类号：TB535 TH1l3 Vibration Control of Cylindrical Shell Partially Treated with Active Lami— nated Polyvinglidene Fluoride Constrained Layer Damping ZHANG Yahong NIU Hongpan ZHANG Xinong XIE Shilin (Minstry ofEducation Key Laboratory for Strength and Vibration,Xi’atl Jiaotong University,Xi’an 710049) Abstract：Vibration control of cylindrical shell partially treated with the active laminated polyvinglidene fluoride(PVDF)constrained layer damping(ALCLD)is investigated．The electromechanically coupled equations of the system considered are derived by using Hamilton’S principle．The analytic formulae of actuating forces produced by ALCLD are obtained．Th e vibration control is simulated as well for a simply supported cylindrical shell partially treated with ALCLD employing velocity feedback scheme．Th e results show that the increasing of PVDF layer number can improve significantly the control perform ance since the acting forces of ALCLD are linear with the PVDF layer numbe