Ship shafting systems have traditio

Ship shafting systems have traditionally been modeled as
a lumped parameter system, a continuous system, or by using
three-dimensional finite element models, based on a wealth of
practical experience as well as fundamental physical principles. Although there is some recent novel research about the
torsional [6, 8, 9, 13, 23], axial [10, 15], transverse [21], and
coupled vibration analysis [1, 12, 16, 17], which includes
some complex mathematical models, the approximate lumped
parameter model is still widely used by engineers. Nestorides
[11], Tuplin [19], Wilson [22], and Li et al. [7] have reviewed the methods to establish the equivalent lumped mass models
by simplifying the propulsion shafting of marine engine.
The schematic diagram of a marine propulsion shafting system driven by a four-stroke, 6 cylinder, diesel engine, and
including one damper, one high flexible coupling, and one
clutch that is of interest in this paper is shown in Fig. 1(a).
The basic parameters of the system are given in Table 1.
The approach described in references [7, 11, 19, 22] is used
here to construct the lumped parameter model of the propulsion shafting system, in which the lumped inertia elements
are connected by massless uniform elastic elements with or
without damping elements. Fig. 1(b) shows the simplified
lumped mass model with 27 lumped masses; Ii and ci (i =
1, 2, … 27) are the polar mass moments of inertia and the
external damping coefficients of the i-th lumped mass, while
ki,i+1 and ci,i+1 (i = 1, 2, … 27) are the torsional stiffness and
the internal damping coefficients of the shaft between inertia
elements i and i+1, respectively.

Hasil (Bahasa Indonesia) 2:

Sistem kapal shafting secara tradisional telah dimodelkan sebagai
sistem parameter terpusat, sistem kontinyu, atau dengan menggunakan
tiga dimensi model elemen hingga, berdasarkan kekayaan
pengalaman praktis serta prinsip-prinsip fisika fundamental. Meskipun ada beberapa penelitian terbaru novel tentang
torsional [6, 8, 9, 13, 23], aksial [10, 15], melintang [21], dan
ditambah getaran analisis [1, 12, 16, 17], yang meliputi
beberapa model matematika yang kompleks, perkiraan disamakan
parameter model masih banyak digunakan oleh para insinyur. Nestorides
[11], Tuplin [19], Wilson [22], dan Li et al. [7] telah meninjau metode untuk membangun model massa setara disamakan
dengan menyederhanakan shafting propulsi mesin kelautan.
Diagram skematik dari propulsi sistem shafting laut didorong oleh empat-stroke, 6 silinder, mesin diesel, dan
termasuk salah satu peredam, satu kopling fleksibel tinggi, dan satu
kopling yang menarik dalam tulisan ini ditunjukkan pada Gambar. 1 (a).
Parameter dasar dari sistem diberikan dalam Tabel 1.
Pendekatan yang dijelaskan dalam referensi [7, 11, 19, 22] digunakan
di sini untuk membangun parameter model disamakan sistem propulsi shafting, di mana disamakan elemen inersia
dihubungkan oleh elemen elastis seragam tak bermassa dengan atau
tanpa redaman elemen. Ara. 1 (b) menunjukkan disederhanakan
Model massa disamakan dengan 27 massa terpusat; Ii dan ci (i =
1, 2, ... 27) adalah saat-saat massa polar inersia dan
koefisien redaman eksternal dari massa disamakan i-th, sementara
ki, i + 1 dan ci, i + 1 (i = 1, 2, ... 27) adalah kekakuan torsional dan
koefisien redaman internal poros antara inersia
elemen i dan i + 1, masing-masing.