In order to evaluate the flow field characteristics of a marine diesel engine cooling water jacket, and provide theoretical basis for further optimizing jacket structure. A computational fluid dynamics (CFD) method was used calculate three-dimensional jacket. Based on CFD simulation model analysis pressure field, velocity streamline distribution uniformity under rated condition were carried out...

Most of oil and gas offshore platforms are located in the seismic regains. So, Seismic vulnerability evaluation of the offshore platforms is one of the most important and vital issues in the structural systems. In this study, jacket type offshore platforms are studied by incorporating the pushover analyses and nonlinear time history analyses, in such a way that, first some push over analyses ar...

Accelerating marginal field development must consider the economic factor. While structural strength remain capable and robust when subjected to environmental loads. To meet desired objective in design phase, optimization is used. With rapid growth of computing technology, method developed as more advanced reduced iteration time. However, evaluation jacket structure a complex problem. The usual...

We present a new class of cocyclic Jacket matrices over complex number field with any size. We also construct cocyclic Jacket matrices over the finite field. Such kind of matrices has close relation with unitary matrices which are a first hand tool in solving many problems in mathematical and theoretical physics. Based on the analysis of the relation between cocyclic Jacket matrices and unitary...

Jacket matrices motivated by the center weight Hadamard matrices have played an important role in signal processing, communications, image compression, cryptography, etc. In this paper, we suggest a design approach for the Pauli block jacket matrix achieved by substituting some Pauli matrices for all elements of common matrices. Since, the well-known Pauli matrices have been widely utilized for...

Marine industry requires continued development of new technologies in order to produce oil. An essential requirement in design is to be able to compare experimental data from prototype structures with predicted information from a corresponding analytical finite element model. In this study, structural model updating may be defined as the fit of an existing analytical model in the light of measu...

Owing to its orthogonality, simplicity of the inversion and fast algorithms, Jacket transform generalising from the Hadamard transform has played important roles in signal and image processing, mobile communication for coding design, cryptography, etc. In this paper, inspired by the emerging block Jacket transform, a new class of circulant block Jacket matrices (CBJMs) are mathematically define...

Strengthening of columns using concrete jackets depends on friction at the interface between them. So strengthening edge and corner in only one story needs a large cross section area due to shortage length which leads architectural issues. This research aims study Jacket more than increases original column. As result, load transferred from column jacket will be increased. Thirteen models were d...