Аннотації
14.09.2023
В статті вивчається динамічна поведінка віброударного демпфера малої маси, який розглядається як засіб пасивного управління вібрацією. Його розрахункова схема відповідає схемі однобічного віброударного нелінійного поглинача енергії (single-sided vibro-impact nonlinear energy sink – SSVI NES). Передбачається, що він може бути використаний для ефективного гасіння коливань при різному перехідному навантаженні, а саме, імпульсному, широко смугастому, вітровому. Його динаміка та ефективність сильно залежать як від власних параметрів демпфера, так і від параметрів зовнішнього навантаження. Режими реагування та ефективність демпфера розглядаються для двох варіантів його оптимізованих параметрів при періодичному навантаженні. Також аналізується вплив характеристик пружності контактуючих поверхонь на ефективність демпфера. Показано, що в системі з більш важким демпфером та з його невеликою жорсткістю реалізуються коливальні режими з багатою складною динамікою. Проте такий демпфер виявився ефективнішим, особливо при м’якшому ударі.
The article studies the dynamic behavior of a low-mass vibro-impact damper, considered as a device for passive vibration control. Its design scheme corresponds to the scheme of single-sided vibro-impact nonlinear energy sink (SSVI NES), which is supposed to be used for effective vibrations attenuation under different transient loads, namely, impulsive, broadband, wind. Its dynamics and effectiveness strongly depend both on the damper own parameters and the external load parameters. We consider the response regimes and the damper efficiency for two options of its optimized parameters under periodic loading. The influence of the elasticity characteristics of the colliding surfaces on the damper effectiveness is also analyzed. We show that the modes with rich complex dynamics are implemented in a system with a heavier damper with low stiffness. Despite this, it is more effective, especially with a softer impact.
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