TỐI ƯU HÓA TOPOGRAPHY TRONG BỨC XẠ DAO ĐỘNG ÂM CỦA CẤU TRÚC THÂN XE

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Tác giả: Khac Trung Chu

Ngôn ngữ: vie

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Thông tin xuất bản: Tạp chí Khoa học & Công nghệ - Trường Đại học Công nghiệp Hà Nội, 2023

Mô tả vật lý: tr.66

Bộ sưu tập: Báo, Tạp chí

ID: 364381

Thêm vào giỏ Liên kết toàn văn

Bức xạ âm rung động cấu trúc thường được áp dụng trong việc kiểm soát tiếng ồn của cấu trúc. Trên cơ sở đó, tác giả kiểm soát bức xạ âm thông qua việc tối ưu hóa Topography cấu trúc. Việc tối ưu hóa Topography cấu trúc đóng một vai trò quan trọng trong quá trình gia công, giảm độ rung và tính liên kết trong quá trình gia công cũng như lắp ráp. Trong số các tiếng ồn tác động lên kết cấu ô tô mà tác giả đã nghiên cứu, tấm gấp là một trong những loại kết câu có độ rung lớn nhất về cơ học kết cấu. Việc áp dụng phương pháp phần tử hữu hạn và phương pháp phần tử biên cùng với phần mềm tính toán đã góp phần hiệu quả vào việc phân tích đặc tính rung, tính toán công suất bức xạ âm của kết cấu và áp suất âm trong môi trường kín. Bên cạnh đó, nó cũng tạo ra năng lượng bức xạ hữu hạn với cấu trúc phức tạp, tối ưu hóa…
tất cả các tính toán cho thấy hiệu quả rõ ràng của việc tối ưu hóa kết cấu và góp phần hạn chế tiếng ồn của kết cấu chịu ảnh hưởng của dao động âm.The structural vibration acoustic radiation is commonly applied in controlling noise of structure. Basing on that, author controls acoustic radiation through the structure topography optimization. The structure topography optimization plays an important role in processing stiffener, decreasing in vibration and coherence in processing as well as assembling. Among the control noise of car structure that the author has been researching, the folded plate is one of the most major one of structural mechanics. The application of the finite element method and boundary element method together with the software calculation has contributed effectively to analyze both vibration characteristics and calculation of the acoustic radiation power of the structure, as well as sound pressure in the closed environment. Besides these, it also builds up finite radiation power with optimized, complex structure
all the calculations show clear effectiveness of optimization and contributes to control noise of structure influenced by structural sound vibration.

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