预紧力对系统频率漂移的影响

李太平<sup>1,2</sup>, 翁海宽<sup>1,2</sup>, 江浩<sup>1,2</sup>, 洪岩<sup>1</sup>, 齐晓军<sup>1,2</sup>

doi:10.12126/see.2017.06.011

预紧力对系统频率漂移的影响

李太平^1,2, 翁海宽^1,2, 江浩^1,2, 洪岩¹, 齐晓军^1,2^1,2

1.
1. 上海卫星装备研究所, 上海 200240
2.

2. 上海裕达实业有限公司, 上海 200240

详细信息

中图分类号: V416.2
计量
- 文章访问数: 749
- HTML全文浏览量: 6
- PDF下载量: 739
出版历程
- 收稿日期: 2017-05-13
- 修回日期: 2017-11-30
- 发布日期: 2017-12-29

The influence of preload on system frequency variations

LI Taiping^1,2,^1,2

1.
1. Shanghai Institute of Satellite Equipment, Shanghai 200240, China
2.

2. Shanghai Yuda Industrial Co., Ltd., Shanghai 200240, China

摘要

摘要: 文章采用Harmonic的谱估计方法，研究了系统不同构件之间通过螺钉连接时，预紧力对系统动态特性的影响。在预紧力相同的情况下，不同量级的外界激励，会造成系统表现出不同的频率响应特性，呈现非线性时不变特性；大量级的外界激励会造成系统预紧力“失效”，刚度降低，导致系统的固有频率降低，产生频率漂移，在共振处放大倍数降低。
- 预紧力 /
- 频率漂移 /
- 共振 /
- 非线性 /
- Harmonic谱估计方法 /
- 仿真分析 /
- 试验验证
Abstract: In this paper, the influence of the preload on the dynamic characteristics of a system with screw connections among different components is investigated with the harmonic spectrum estimation method. It is shown that with a preload of the same order of magnitude, the system exhibits different dynamic characteristics or FRFs under excitations of different orders of magnitude, as a non-linear time-invariant system. High level excitation may invalidate the preload, thus lead to reductions of the stiffness, the natural frequency, and the amplification in the resonance region.
- preload /
- frequency variations /
- resonance /
- nonlinearity /
- Harmonic spectrum estimation method /
- simulation analysis /
- test validation

HTML全文

参考文献(9)

[1]	WOON C E, MITCHELL L D. Variations in structural dynamic characteristics caused by changes in ambient temperature:I Experimental[J]. Proceedings of SPIE, 1996:2768
[2]	MICHEL C, GUÉGUEN P. Time-frequency analysis of small frequency variations in civil engineering structures under weak and strong motions using a reassignment method[J]. Structural Health Monitoring, 2010, 9(2):159-171
[3]	薛宏伟, 林益明, 刘天雄. 航天器振动试验的频率漂移问题综述[J]. 航天器工程, 2005(4):58-62
[4]	卫洪涛, 孔宪仁, 王本利, 等. 非线性连接结构对一个典型卫星频率漂移的影响[J]. 航天器环境工程, 2012, 29(3):297-303 WEI H T, KONG X R, WANG B L, et al. Effect of nonlinearities in the joints on the amplitude-frequency response of a typical satellite structure[J]. Spacecraft Environment Engineering, 2012, 29(3):297-303
[5]	IWAN W D. A distributed-element model for hysteresis and its steady-state dynamic response[J]. Journal of Applied Mechanics, 1966, 33(4):893
[6]	王本利, 张相盟, 卫洪涛. 基于谐波平衡法的含Iwan模型干摩擦振子非线性振动[J]. 航空动力学报, 2013, 28(1):1-9 WANG B L, ZHANG X M, WEI H T. Harmonic balance method for nonlinear vibration of dry friction oscillator with Iwan model[J]. Journal of Aerospace Power, 2013, 28(1):1-9
[7]	CHOWDHURY M A, HELALI M. The effect of amplitude of vibration on the coefficient of friction for different materials[J]. Tribology International, 2008, 41(4):307-314
[8]	张步云, 陈怀海, 贺旭东. 多输入多输出正弦扫频试验控制新方法[J]. 振动与冲击, 2015, 34(8):198-202 ZHANG B Y, CHEN H H, HE X D. New control method for MIMO swept-sine test[J]. Journal of Vibration and Shock, 2015, 34(8):198-202
[9]	张连朋. 双水平向振动试验台正弦扫频振动控制技术研究[D]. 哈尔滨:哈尔滨工业大学, 2012:17-20