کد مقاله کد نشریه سال انتشار مقاله انگلیسی ترجمه فارسی نسخه تمام متن
4965631 1448451 2018 14 صفحه PDF سفارش دهید دانلود کنید
عنوان انگلیسی مقاله ISI
A modal projection-based reduction method for transient dynamic responses of viscoelastic systems with multiple damping models
ترجمه فارسی عنوان
یک روش کاهش روش مبتنی بر پروتکل مودال برای پاسخهای پویای گذرا از سیستم های ویسکوالازتی با مدل های مختلف دمیدن
کلمات کلیدی
واکنش گذرا، تعدیل ویسکوزلایزایی چندگانه، یکپارچه سازی دقیق زمان، روش های کاهش، طرح ریزی مودال،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر نرم افزارهای علوم کامپیوتر
چکیده انگلیسی


- A modal projection-based reduction method for viscoelastic damping system is proposed.
- The method is applicable to systems with multiple damping models.
- Two robust projection bases are adopted to reduce the order of original system.
- The stability, accuracy and complexity of the method are investigated.
- Two numerical examples are given to show the efficiency of the method.

Large and complex engineering systems are usually assembled by subcomponents with different energy dissipation levels. Therefore, these systems often contain multiple damping models, which may lead to great difficulties in analyzing efficiently. In this paper, an efficient modal projection-based reduction method, which accounts for transient dynamic responses of structural system with multiple damping models, is proposed in the framework of a modified precise integration method. Two robust modal reduction bases, namely multi-model method (MM) and modal strain energy by first-order correction method (MSEC), are introduced to reduce the order of the original system. Based on the reduced system and a general damping model (GDM), a reduced state-space formalism for the structural system with multiple damping models is developed. Finally, the transient dynamic responses are derived using a modified precise integration method on the reduced stage. The numerical stability, accuracy and complexity are discussed. Two numerical examples are illustrated to assess the performances of the computational accuracy and efficiency. The results indicate that the proposed method is more efficient than other methods and most suitable for large-scale problems with rather good accuracy.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Computers & Structures - Volume 194, 1 January 2018, Pages 60-73
نویسندگان
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