Phân tích tương tác giữa khối nước và kết cấu máng bê tông bằng phương pháp FSI

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Tác giả: Hồng Vân Khúc, Đình Thắng Nguyễn

Ngôn ngữ: Vie

Ký hiệu phân loại: 627 Hydraulic engineering

Thông tin xuất bản: Tạp chí Khoa học Kỹ thuật Thủy lợi và Môi trường, 2019

Mô tả vật lý: 88-93

Bộ sưu tập: Metadata

ID: 421755

Thêm vào giỏ

Hiện nay khi phân tích kết cấu làm việc trong môi trường nước thường đưa tải trọng áp lực nước về tải trọng tĩnh gán lên bề mặt kết cấu. Tuy nhiên khi kết cấu chịu tải trọng áp lực nước biến thiên theo thời gian thì phương pháp trên không phản ánh đúng trạng thái làm việc của kết cấu. Phương pháp tương tác trực tiếp giữa khối nước và kết cấu (FSI) có thể giải quyết được vấn đề này thông qua các phần mềm phân tích phần tử hữu hạn thông dụng. Phần mềm ADINA là một trong những phần mềm mạnh có thể mô phỏng tốt tương tác động lực học giữa khối nước và kết cấu công trình. Bài báo thông qua một ví dụ cụ thể phân tích kết cấu cầu máng dẫn nước chịu tác dụng của động đất để thấy rõ hiệu quả của phương pháp FSI., Tóm tắt tiếng anh, The analysis fluid structure interaction (FSI) have been attracted many researchers in the recent years. FSI method becomes a crucial consideration in the design and analysis of various engineering field. FSI allow to replaces the traditional method of assign load on structure by the way that the block of water can act directly on structure over time. However, the coordination of FSI is a difficult problem since the coordinate system which used in describing block of water and the structure is not uniform. In this research using FSI method with a help of ADINA software to solve the problem of fluid and aqueduct interaction for obtained the displacement and stress of structure duration time of earthquake. Due to the influence of earthquake motivation, the static traditional analytical method cannot accurately simulation thus more attention is paid to the FSI method. Other important task of this study is the characteristic of hydrodynamic pressure of flow influence by earthquake can be simplified in expression as mathematical equation based on the relationship of the water depth, the acceleration. The research of FSI can further apply on dynamic response of water resource such the spin-way or dam, turbine in the hydropower.

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