Mô hình đại diện dựa trên CNN của phân tích isogeometric trong các vấn đề flexoelectric phi địa phương

Engineering with Computers - Tập 39 - Trang 943-958 - 2022
Qimin Wang1, Xiaoying Zhuang2,1
1Chair of Computational Science and Simulation Technology, Institute of Photonics, Faculty of Mathematics and Physics, Leibniz University Hannover, Hannover, Germany
2Department of Geotechnical Engineering, College of Civil Engineering, Tongji University, Shanghai, China

Tóm tắt

Chúng tôi đề xuất một mô hình đại diện dựa trên mạng nơ-ron tích chập (CNN) để dự đoán phản ứng phi địa phương cho các cấu trúc flexoelectric có hình dạng phức tạp. Đầu vào, tức là các hình ảnh nhị phân, cho CNN được tạo ra bằng cách chuyển đổi hình học thành pixel, trong khi đầu ra đến từ các mô phỏng của một mô hình flexoelectric isogeometric (IGA), mà khai thác tính liên tục bậc cao của các hàm cơ sở b-spline hữu tỉ không đồng nhất (NURBS) để tính toán nhanh các tham số flexoelectric, ví dụ: độ dốc điện, biến dạng cơ học, dịch chuyển, và độ dốc biến dạng. Để tạo ra bộ dữ liệu cho các cantilevers flexoelectric có rỗng, chúng tôi đã phát triển một kỹ thuật cắt NURBS dựa trên mô hình IGA. Về việc xây dựng CNN, các yếu tố chính đã được tối ưu hóa dựa trên bộ dữ liệu IGA, bao gồm các hàm kích hoạt, lớp dropout và bộ tối ưu. Sau đó, việc xác thực chéo được tiến hành để kiểm tra khả năng tổng quát của CNN. Cuối cùng, tiềm năng của hiệu suất CNN đã được khám phá dưới các kích thước đầu ra mô hình khác nhau và các bố cục mô hình có thể tối ưu tương ứng được đề xuất. Các kết quả có thể hữu ích cho các nghiên cứu về học sâu trong các mô phỏng cơ- vật lý phi địa phương khác.

Từ khóa

#CNN #flexoelectric #mô hình đại diện #phân tích isogeometric #NURBS #học sâu #mô phỏng cơ-vật lý phi địa phương

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