MODE COMPLEXITY IN A HARMONICALLY FORCED STRING CONSIDERING AN ASYMMETRICLOCAL SPRING-DAMPER

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JOMEZADE KHAZARBEYGI SALEH; JALALI AMIR

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Journal: Modares Mechanical Engineering Year:2016 | Volume:16 | Issue:8 Page(s): 0-0

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Title

MODE COMPLEXITY IN A HARMONICALLY FORCED STRING CONSIDERING AN ASYMMETRICLOCAL SPRING-DAMPER

Author(s)

JOMEZADE KHAZARBEYGI SALEH | JALALI AMIR | Issue Writer Certificate

Keywords

STEADY-STATE DYNAMICQ1

MODE COMPLEXITYQ1

FREQUENCY SHIFTQ1

TRAVELING WAVEQ1

Abstract

In this study the STEADY-STATE DYNAMIC of a linear, homogeneous, un-damped string, coupled with alocally connected spring-dashpot system is analytically investigated. Both ends of the string areassumed to be excited with identical and synchronous harmonic motion. It is shown that the damperintroduces MODE COMPLEXITY and leads to FREQUENCY SHIFT between the peak amplitudes in differentlocations of the string. Also, it causes phase variations which indicates MODE COMPLEXITY domain. In thisstudy, it is shown that there are different combinations of spring and damper constants in which themode complexity attains its maximum level. Surprisingly, the combination is unique in each givenexcitation frequency ratio. In this situation, the damping constant is bounded in a specified range, butthe spring constant is increased as the excitation frequency ratio is increased. In such case, all vibrationnormal modes of the string are completely destroyed and, in turn, TRAVELING WAVEs are formed. Also, it isshown that the damping constant which leads to the maximum FREQUENCY SHIFT is not necessarily equal tothe one that introduces the maximum MODE COMPLEXITY.

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APA: Copy

JOMEZADE KHAZARBEYGI, SALEH, & JALALI, AMIR. (2016). MODE COMPLEXITY IN A HARMONICALLY FORCED STRING CONSIDERING AN ASYMMETRICLOCAL SPRING-DAMPER. MODARES MECHANICAL ENGINEERING, 16(8), 0-0. SID. https://sid.ir/paper/356490/en

Vancouver: Copy

JOMEZADE KHAZARBEYGI SALEH, JALALI AMIR. MODE COMPLEXITY IN A HARMONICALLY FORCED STRING CONSIDERING AN ASYMMETRICLOCAL SPRING-DAMPER. MODARES MECHANICAL ENGINEERING[Internet]. 2016;16(8):0-0. Available from: https://sid.ir/paper/356490/en

IEEE: Copy

SALEH JOMEZADE KHAZARBEYGI, and AMIR JALALI, “MODE COMPLEXITY IN A HARMONICALLY FORCED STRING CONSIDERING AN ASYMMETRICLOCAL SPRING-DAMPER,” MODARES MECHANICAL ENGINEERING, vol. 16, no. 8, pp. 0–0, 2016, [Online]. Available: https://sid.ir/paper/356490/en

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