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宽带白噪声激励下粘弹性阻尼薄板的振动分析

Release Time:2019-03-10  Hits:

Indexed by: Journal Article

Date of Publication: 2016-04-22

Journal: 机电工程技术

Volume: 45

Issue: 4

Page Number: 84-88

ISSN: 1009-9492

Key Words: 宽带白噪声;粘弹性减振;Monte-Carlo方法;振动响应

Abstract: 恶劣的噪声环境将影响飞行器的正常工作,因此飞行器的典型结构在噪声激励下响应的正确分析就显得十分必要.针对白噪声声源的特点,使用Monte-Carlo方法模拟了噪声载荷的时域信号.建立了钛合金薄板及其粘弹性约束层阻尼处理后的有限元模型,结合有限元方法分析了薄板在高强度噪声载荷作用下的振动响应,并对比粘弹性阻尼添加前后的振动位移和应力分析了噪声环境下的粘弹性阻尼薄板的减振性能.研究结果表明,粘弹性约束层能改变钛合金薄板的固有频率,能够降低噪声载荷引起的薄板振动位移和应力.

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