Optimasi Topologi dan Dimensi pada Desain Skid Frame untuk Proses Loadout Struktur Jacket Tiga Kaki

Rahma, Salsabila Tsaniatur (2024) Optimasi Topologi dan Dimensi pada Desain Skid Frame untuk Proses Loadout Struktur Jacket Tiga Kaki. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Salah satu inovasi yang dilakukan oleh perusahaan fabrikasi dalam memeroleh efisiensi biaya adalah dengan mempertimbangkan aspek optimal pada desain struktur. Kriteria optimal yang digunakan adalah minimalisasi berat struktur, sehingga didapatkan penurunan biaya material. Terdapat tiga aspek optimasi dalam desain struktur, yaitu topologi, bentuk, dan, dimensi. Penelitian ini akan berfokus pada optimasi topologi dan dimensi. Metode Solid Isotropic Material with Penalization (SIMP) pada software Abaqus dipilih sebagai metode optimasi topologi. Algoritma dari metode SIMP ini nantinya akan menentukan distribusi material paling optimal dalam satu design space yang dikenai kondisi pembebanan dan boundary condition tertentu. Hasil topologi optimal kemudian dilakukan optimasi kembali pada aspek dimensi. Optimasi dimensi dilakukan dengan objektif minimalisasi berat struktur dengan tetap memenuhi kriteria rasio tegangan (UC) maksimum. Solver fmincon pada software Matlab digunakan untuk mempermudah proses optimasi nonlinier pada proses optimasi dimensi. Surrogate model dibangun pada penelitian ini untuk melakukan aproksimasi fungsi hubungan antara dimensi dengan UC yang rumit untuk dianalisis. Surrogate model dibangun menggunakan metode Radial Basis Function (RBF) dengan data training berupa input dan output data. Model topologi optimal memberikan hasil penurunan tegangan von mises maksimum sebesar 18% dan penurunan defleksi sebesar 40%. Kemudian, model topologi dengan dimensi optimal memberikan hasil penurunan berat sebesar 38%.
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One of the innovations undertaken by the fabrication company to achieve cost efficiency is by considering optimal aspects in structural design. The optimal criteria used is the minimization of structural weight, leading to a reduction in material costs. There are three aspects of optimization in structural design: topology, shape, and dimensions. This research will focus on topology and dimension optimization. The Solid Isotropic Material with Penalization (SIMP) method in Abaqus software is chosen for topology optimization. The algorithm of the SIMP method will determine the most optimal material distribution within a design space subjected to specific loading conditions and boundary conditions. The optimal topology results are then further optimized for dimensions. Dimension optimization is conducted with the objective of minimizing structural weight while still meeting the maximum stress ratio (UC) criteria. The fmincon solver in Matlab software is utilized to facilitate the nonlinear optimization process in dimension optimization. A surrogate model is constructed in this research to approximate the complex relationship between dimensions and UC. The surrogate model is built using the Radial Basis Function (RBF) method with training data consisting of input and output data. The optimal topology model results in a maximum von Mises stress reduction of 18% and a deflection reduction of 40%. Subsequently, the optimal topology and dimension model results in a weight reduction of 38%.

Item Type: Thesis (Other)
Uncontrolled Keywords: Optimasi Topologi, Optimasi Dimensi, Skidding Loadout, Skid Frame, Desain Struktur, Topology Optimization, Dimension Optimization, Skidding Loadout, Skid Frame, Structural Design
Subjects: T Technology > T Technology (General) > T57.6 Operations research--Mathematics. Goal programming
T Technology > TA Engineering (General). Civil engineering (General) > TA347 Finite Element Method
T Technology > TA Engineering (General). Civil engineering (General) > TA492.G5 Girders
T Technology > TA Engineering (General). Civil engineering (General) > TA645 Structural analysis (Engineering)
T Technology > TA Engineering (General). Civil engineering (General) > TA658 Structural design
T Technology > TA Engineering (General). Civil engineering (General) > TA660.F7 Structural frames.
Divisions: Faculty of Marine Technology (MARTECH) > Ocean Engineering > 38201-(S1) Undergraduate Thesis
Depositing User: Salsabila Tsaniatur Rahma
Date Deposited: 01 Aug 2024 12:39
Last Modified: 12 Sep 2024 07:18
URI: http://repository.its.ac.id/id/eprint/109147

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