Provided are a floating dock and a method for scrapping ships with which costs in scrapping operations and burdens on the environment can be reduced. The disclosed floating dock includes: a connection block (3) that is connected to a cut section (11a) formed by cutting off the bow section (11) of a ship; a stowing section (4) formed by removing bulkheads (13a) arranged in the hold section (13); a first open section (5) formed by removing a portion of the upper deck (14), which is arranged above the stowing section (4), closer to the bow section (11); a second open section (6) formed by removing a portion of the upper deck (14), which is arranged above the stowing section (4), closer to the stern section (12); and a planar section (7) formed above the upper deck (14) between the first open section (5) and the second open section (6). The connection block (3) has an open/close gate (31) that allows or inhibits the intrusion of water into the stowing section (4).
B63B 9/00 - Méthodes de tracé, de construction, d'entretien, de conversion, de radoubage, de réparation ou de détermination des caractéristiques des navires, non prévues ailleurs
B63B 9/04 - Reconstruction des navires, p.ex. par augmentation du tonnage
B63B 27/10 - Aménagement des équipements de bord pour l'embarquement ou le débarquement des cargaisons ou des passagers des grues, ponts roulants ou portiques
An ultrasonic peening method which, in order to improve the fatigue strength of the weld (3) between a floating building (1) and a structure (2) welded to the floating building (1), applies an impact to the weld (3) by a pin (4) vibrated by an ultrasonic wave. The ultrasonic peening method comprises: a building construction step for constructing the floating building (1); a structure welding step for attaching the structure (2) to the floating building (1) by welding; a building launching step for lowering the floating building (1), to which the structure (2) has been attached, into water; and an ultrasonic peening step for applying ultrasonic peening to the weld (3) of the floating building (1) having buoyancy.
B23K 31/00 - Procédés relevant de la présente sous-classe, spécialement adaptés à des objets ou des buts particuliers, mais non couverts par un seul des groupes principaux
B24C 1/10 - Méthodes d'utilisation de jet abrasif en vue d'effectuer un travail déterminéUtilisation d'équipements auxiliaires liés à ces méthodes pour augmenter la compacité des surfaces, p. ex. par grenaillage
Disclosed is an oil tanker equipped with a plurality of center tanks (10a) the inner surfaces of which are smooth, which are provided in the central area, and which are partitioned from one another by transverse bulkheads (11a); wing tanks (10b) which are provided on both sides of the center tanks, with longitudinal bulkheads (11b) interposed; struts (22) which are provided in the wing tanks and reinforce the longitudinal bulkheads and transverse ribs; and corrugated members (24) which are provided on the transverse bulkheads and reinforce the same. The struts (22) and the corrugated members (24) are set in such a way that the hull strength to be required on a vessel after ship category change is secured and that the center tanks (10a) can be used, without change, as holds of the vessel after ship category change.
B63B 25/04 - Installations de chargement, p. ex. pour le rangement ou l'arrimageNavires spécialisés à cet effet pour chargement de marchandises solides
B63B 25/08 - Installations de chargement, p. ex. pour le rangement ou l'arrimageNavires spécialisés à cet effet pour chargement de marchandises fluides
Disclosed is a gas-fired superconductive electrically propelled ship provided with a cargo tank (1) (fuel tank) which stores LNG (2); a boil-off gas feed line (3) which sends boil-off gas (2') generated inside the cargo tank (1) to a dual-fuel engine (5) (drive engine) of a generator (6) as fuel; a gas heater (4) which is provided at the middle of the boil-off gas feed line (3) and raises the temperature of the boil-off gas (2'); a superconductive motor (7) used for propulsion, which is driven by power generated by the generator (6); a heat pump (15) which cools the superconductive motor (7) and keeps the temperature low; and a LNG gasification line (26) which sends the LNG (2) from the cargo tank (1) as a cold heat source used for compression heat dissipation processing at the heat pump (15) and leads the processed boil-off gas (2') to the cargo tank (1) and the gas heater (4) intake side of the boil-off gas feed line (3).
B63B 25/16 - Installations de chargement, p. ex. pour le rangement ou l'arrimageNavires spécialisés à cet effet pour chargement de marchandises fluides fermées isolées de la chaleur
B63H 21/17 - Aménagements de l'appareil moteur de propulsion ou de certains de ses éléments pour utilisation à bord des navires le navire étant actionné par moteurs par moteur électrique
B63H 21/38 - Appareils ou procédés spécialement adaptés à la manipulation de liquides pour l'appareil moteur d'un navire ou pour l'un de ses éléments, p. ex. lubrifiants, réfrigérants, carburants ou analogues
B63J 3/04 - Entraînement des auxiliaires par l'ensemble moteur autre que celui de la propulsion
F01K 25/10 - Ensembles fonctionnels ou machines motrices caractérisés par l'emploi de fluides énergétiques particuliers non prévus ailleursEnsembles fonctionnant selon un cycle fermé, non prévus ailleurs utilisant des vapeurs particulières ces vapeurs étant froides, p. ex. ammoniac, gaz carbonique, éther
Provided is a bell mouth design method, by which a bell mouth shape suitable for a ship type can be designed easily without relying on specific craftsmen. The bell mouth design method comprises: an initial shape setting step (Step1) for setting the initial shape of a bell mouth (4); a three-dimensional model creation step (Step2) for creating the three-dimensional models of the bell mouth (4) and other parts on a computer; a preliminary shape modification step (Step3) for modifying the outer circumferential shape of the three-dimensional model of the bell mouth (4) so as to be rotatable when an anchor (3) contacts the initial shape of the bell mouth (4); a mechanical analysis step (Step4) for performing, using the three-dimensional models of the bell mouth (4) and other parts, a mechanical analysis of the housing state of the anchor (3) on the computer; a determination step (Step5) for checking whether the result of the mechanical analysis satisfies a predetermined condition or not; and a shape modification step (Step6) for modifying the three-dimensional model of the bell mouth (4) on the computer on the basis of the result of the mechanical analysis.
B63B 21/14 - ÉcubiersManchons d'écubierFermetures des trous d'écubiers
B63B 9/00 - Méthodes de tracé, de construction, d'entretien, de conversion, de radoubage, de réparation ou de détermination des caractéristiques des navires, non prévues ailleurs
The object is to facilitate the installation of a contra-rotating propeller unit on a mother ship. Disclosed is a contra-rotating propeller unit in which a predetermined part on the rear side of an inner shaft (12) is supported by a contra-rotating rear bearing (36) provided in the inside of a boss (13a) of a front propeller (13), and which comprises: an inner shaf-fixing tool (50) fixed removably to the tip of an outer shaft (11) and supporting a predetermined part on the front side of the inner shaft (12) temporarily; and a contra-rotating thrust bearing (40) provided in the inside of the boss (13a) of the front propeller (13) and transmitting a thrust load received from the outer shaft (11) to the inner shaft (12).
B63H 5/10 - Aménagements à bord des navires des éléments propulsifs agissant directement sur l'eau des hélices comportant plus d'une hélice du type coaxial, p. ex. du type contre rotatif
B63B 9/00 - Méthodes de tracé, de construction, d'entretien, de conversion, de radoubage, de réparation ou de détermination des caractéristiques des navires, non prévues ailleurs
The thrust load of an outer shaft (11) is received by a contra-rotating thrust bearing (40) provided in a boss (13a) of a front propeller (13) and transmitted to an inner shaft (12). The thrust load of both the outer shaft (11) and the inner shaft (12) is received by an inner shaft thrust bearing (41) provided on the bow side of a power transmission device (20A) and transmitted to a ship body (2). The rotational force of an outer shaft output shaft (24) is transmitted to the outer shaft (11) via a flexible shaft joint (19) (gear coupling (19A)). Thus, the thrust load of the outer shaft (11) is transmitted to the ship body (2) only via the inner shaft (12) without being directly transmitted to the ship body (2), and the axial displacement and angular displacement are allowed by the gear coupling (19), so that the influence of the displacement of the ship body on the shaft center of the outer shaft (11) can be eliminated.
B63H 5/10 - Aménagements à bord des navires des éléments propulsifs agissant directement sur l'eau des hélices comportant plus d'une hélice du type coaxial, p. ex. du type contre rotatif
B63H 21/38 - Appareils ou procédés spécialement adaptés à la manipulation de liquides pour l'appareil moteur d'un navire ou pour l'un de ses éléments, p. ex. lubrifiants, réfrigérants, carburants ou analogues
B63H 23/10 - Transmission de l'énergie de l'appareil de propulsion aux éléments propulsifs à entraînement mécanique pour transmettre l'action de plusieurs ensembles de propulsion
Lubricant oil (45) serving as second lubricant oil is supplied into an outer shaft intermediate shaft (11c) by a lubricant oil supply unit (50) and accumulated therein, and thereby the lubricant oil (45) is supplied to a contra-rotating front seal unit (37). Thus, by bringing the front side of the contra-rotating front seal unit (37) (seal ring (37b)) into a wet state by the lubricant oil (45), heat generation can be reduced and the life of the contra-rotating front seal unit (37) can be extended.
B63H 5/10 - Aménagements à bord des navires des éléments propulsifs agissant directement sur l'eau des hélices comportant plus d'une hélice du type coaxial, p. ex. du type contre rotatif
B63H 21/38 - Appareils ou procédés spécialement adaptés à la manipulation de liquides pour l'appareil moteur d'un navire ou pour l'un de ses éléments, p. ex. lubrifiants, réfrigérants, carburants ou analogues
B63H 23/16 - Transmission de l'énergie de l'appareil de propulsion aux éléments propulsifs à entraînement mécanique pour transmettre l'action de plusieurs ensembles de propulsion permettant la combinaison d'emploi des ensembles de propulsion caractérisée par l'aptitude au changement de marche
B63H 23/34 - Arbres porte-hélicesArbres de roues à aubesFixation des hélices sur les arbres
F16J 15/16 - Joints d'étanchéité entre deux surfaces mobiles l'une par rapport à l'autre
9.
TEMPERATURE DISTRIBUTION HISTORY ESTIMATING METHOD
A method for estimating the temperature distribution history of when a steel sheet is line-heated by high-frequency induction. The method comprises a first step of measuring the temperature distribution history occurring when a test piece of a steel sheet is spot-heated, a second step of analyzing the induced current distribution occurring when the steel sheet is spot-heated, a third step of expressing the induced current distribution by an approximation formula of the initial induced current distribution at the initial temperature and an approximation formula of the temperature-dependence correction coefficient of the initial induced distribution and determining the initial induced current distribution and the temperature dependence correction coefficient on the basis of the temperature distribution history and the induced current distribution, a fourth step of analyzing the internal heat generation on the basis of the initial induced current distribution, the temperature dependence correction coefficient, and the temperature dependence of the electric resistivity of the steel sheet, and a fifth step of analyzing the temperature distribution history occurring when the steel sheet is being line-heated while moving the steel sheet and giving internal heat generation to the steel sheet. According to the method, the temperature distribution history of when the steel sheet is line-heated by high-frequency induction can be estimated with a high accuracy and with a high efficiency.
Provided is a thermoelectric power generator which can efficiently perform thermoelectric conversion (power generation) from a fluid having a temperature difference, with easy maintenance and a small space required, for stably supplying power at low cost compared with conventional generators. A power generating system using such thermoelectric generator is also provided. In a thermoelectric element (27), P-type thermoelectric semiconductor elements and N-type thermoelectric semiconductor elements are alternately arranged in parallel. The thermoelectric element is sealed in a heat conductive plate (30) to be sandwiched by an electrode and an insulator, and a plate-like thermoelectric power generating unit (31) is formed. A plurality of plate-like thermoelectric power generating units are laminated, and first spaces (32) wherein a high-temperature fluid (W) circulates and second spaces (33) wherein a low-temperature fluid (C) circulates are alternately formed between the plate-like thermoelectric power generating units. By gathering openings formed on the plate-like thermoelectric power generating units (31), a first inflow channel (34) and a first outflow channel (35) for flowing in and out the high-temperature fluid (W) to and from the first spaces (32), and a second inflow channel and a second outflow channel for flowing in and out the low-temperature fluid (C) to and from the second space (33) are formed.
A method of evaluating the joining strength of a double-lap joint body (100) that is formed by lapping over each other three plate members including composite members (10) and restraining them at their side surfaces. The method has a step of determining allowable shear stress of the double-lap joint body (100) by a tensile test using test pieces with different restraint lengths (L), a step of determining shear stress of the double-lap joint body (100) by the finite element analysis method, and a step of comparing and evaluating the allowable shear stress and the shear stress. The method enables evaluation of the peeling strength of a joint where an adhesive layer cannot be clearly defined.
[PROBLEMS] To provide the auxiliary float of a floating structure which can prolong the lifetime of the floating structure by reducing external force acting on the brace and can be used even at a very deep place by increasing buoyancy, and to provide a remodeling method of the floating structure. [MEANS FOR SOLVING PROBLEMS] The auxiliary float (11) comprises two floats (12) coupled, respectively, to the lower portions of two lower hulls (1) constituting a floating structure, two main coupling members (13) for coupling the floats (12) to each other, and four sub-coupling members (14) for coupling the main coupling member (13) and the float (12). The auxiliary float (11) is produced in advance and the floating structure is mounted on the auxiliary float (11), and then the lower hull (1) and the float (12) are connected, thus remodeling the floating structure.
Provided is a welded structure suitable for a hull structure and excellent in brittle-cracking propagation stopping characteristics. The welded structure is provided with a fillet welded joint having an unwelded portion (4) left on the abutting face of a web (1) against a flange (2). A percentage (X) (= 100쮏n/L) (%) to the sum (L) of the width (n) of the unwelded portion (4) and the leg length (3 (3a and 3b)) of the left and right fillet welded joints in the joint section of the fillet welded joint, and the brittle-cracking propagation stopping toughness (Kca (N/mm3/2)) at the using temperature of the flange satisfy X (%) ≥ {5900 - Kca(N/mm3/2)}/85. The unwelded portion (4) in the fillet-welded joints is given a width of 15 to 90 % of the sum of the thickness (t) of the web (1) and the leg length (3 (3a and 3b)) of the left and right fillet welded joints. In case the web has the butt-welded joint portion of the thickness (t), the percentage (X) (%) and the brittle-cracking propagation stopping toughness (Kca)(N/mm3/2) satisfy the aforementioned formula.
brevets