30results about How to "Lower Lifetime Costs" patented technology

The invention relates to a method for enhancing bituminous mixtures by adopting chopped basalt fibers, belonging to the technical field of novel compound materials. According to the invention, continuous basalt protofilaments or twistless rovings the surfaces of which are expanded into fibers in certain length, and then the fibers are used for enhancing the bituminous mixtures in a certain doping proportion and can be respectively used for maintaining the bituminous mixtures used for new construction and reconstruction and extension of highways and SMA and OGFC bituminous mixtures as well as fiber seals. In addition, the fibers can also be used for the enhancement of high-speed railway packing layer CA mortar and relevant hydraulic architectures. The chopped basalt fiber plays roles of enhancing, toughening and elasticizing the cracking prevention, crack resistance and reinforcement and 'bridging' in the enhanced bituminous mixtures, can obviously increase the anti-rutting ability of highways of the enhanced bituminous mixtures and reduces the whole life costs of the enhanced bituminous mixtures; if the fibers are used for high-speed railway plate-type ballastless tracks and CA mortar, the bending strength and the deformation resistance can be increased, i.e. the fibers play a role of crack prevention and crack resistance; in addition, the fibers have better anti-water leakage action if being used for Hydraulic and Hydro-Power Engineering.

The invention discloses a water-coupled charging blasting demolition method for a reinforced concrete beam or column. The process that blast holes are formed along the axis of the reinforced concrete beam or column and water is poured into the blast holes is adopted, and the aims of reducing resistance of deep hole charging, achieving accurate charging, efficiently utilizing water pressure blasting energy, effectively controlling the strength and amount of vibration of blasting, blasting flyrock, air shock waves and poisonous blasting gas and reducing blasting dust are achieved. According to the method, the process is simple, operation is easy, the application range is wide, and the method is an ideal construction method for demolition of the reinforced concrete beam and column.

The invention relates to a hot and light balloon, in particular to a hot and light balloon which is internally provided with high-temperature light gas, can suspend in the air at a certain height and can be controlled to descend. The hot and light balloon is composed of a bag body, a structure net, a plurality of turbulators, a remote control heating module installed in a hot balloon body through a support, a gas nozzle, a state sensor and controller module, a gas pump and a gas storage device. When the bag body is full of hot and light gas, the load capacity of the hot and light balloon is the highest; when the mass of the light gas in the bag body is small and the temperature of the light gas in the bag body is low, the bag body is deformed under the action of air pressure outside the bag body, the size is reduced, and the load capability of the hot and light balloon is reduced.

The invention relates to a periodically arranged sparse array antenna and an arrangement method thereof. The array antenna includes S antenna periodic structures, and each antenna periodic structure includes N1 transmitting antennas and N2 receiving antennas. The N1 transmitting antennas are arranged in a first straight line, the N2 receiving antennas are arranged in a second straight line, the first straight line is parallel to the second straight line, and the first straight line is located above or below the second straight line. The S antenna periodic structures are sequentially arranged into an array antenna, the array antenna comprises M equivalent phase centers, and the M equivalent phase centers are arranged in an equidistant straight line, wherein a midpoint between any one of thereceiving antennas and any one of the transmitting antennas in the array antenna is an equivalent phase center, and 1-S(N1+N2) / M is larger than 0. The use of the periodic structures facilitates the formation of reusable standard modules, the improvement of product consistency is facilitated, maintenance parts are reduced, the maintainability is improved, and the full life cost of a product is reduced.

The invention relates to a method for assessing concrete structure durability life prolonged by a concrete surface coating. The method mainly comprises the following steps that 1, a concrete specimenis prepared, and maintenance is conducted; 2, after the specimen is subjected to surface dry, part of the specimen is covered with the concrete surface coating, and the other part of the specimen is not covered with concrete surface coatings; 3, after the coating is cured, the concrete specimen is placed in a chlorine salt environment for exposure; 4, after exposure is conducted for different ages, the specimen is taken out, chlorine ion depth distribution in a protection layer is measured, and a chlorine ion diffusion coefficient is calculated; 5, according to a Fick's second law, the concrete structure durability life prolonged by the concrete surface coating is assessed quantificationally. The method for assessing the concrete structure durability life prolonged by the concrete surfacecoating has the advantages that by means of the method, the concrete structure durability life prolonged by the concrete surface coating can be assessed quantificationally, the coating protection lifeis precisely designed, and the durability and the service safety of a concrete structure are guaranteed.

The invention discloses an eddy current axial damper. The eddy current axial damper comprises a screw, a nut, a fixed drum, an inner rotating drum and an outer rotating drum. The fixed drum sleeves the outer side of the screw. The inner rotating drum is connected with the nut and arranged between the screw and the fixed drum in a sleeving mode. Magnets are arranged on the periphery of the inner rotating drum, and a conductor pipe is arranged on the inner wall of the fixed drum. The outer rotating drum is connected with the nut and sleeves the outer side of the fixed drum. A conductor pipe is arranged on the inner wall of the outer rotating drum, and magnets are arranged on the periphery of the fixed drum. According to the eddy current axial damper, two sets of module connection are formedbetween the inner rotating drum and the fixed drum and between the outer rotating drum and the fixed drum, the sizes are not mutually affected, the parts can be independently designed, and modularizedproduction and combination are achieved. By means of multiple combination modes such as inner and outer rotation, inner rotation and outer rotation, the requirements for the damper size limitation, the damping force inertia force change mode and the heat dissipation efficiency are met. The structure comprises a movement conversion mechanism and an eddy current damping generator. The eddy currentdamping generator is free of the frictional loss, after the service life of the damper ends, only the movement conversion mechanism needs to be replaced, the eddy current damping generator can continue to be used, and therefore the life cycle cost is reduced.

The invention discloses profile steel which comprises an upper flange plate and a web plate, and the end of the upper flange plate and / or the end of the web plate extend / extends outwards to form an extending section. The invention further discloses profile steel which comprises an upper flange plate, a web plate and a lower flange plate, and the end of at least one of the upper flange plate, the web plate and the lower flange plate extends outwards to be provided with an extending section. The invention further provides a profile steel-UHPC composite plate which comprises a UHPC plate and a plurality of profile steel, wherein the UHPC plate is arranged on the upper flange plate of the profile steel. The invention further provides a bridge deck slab and a steel-UHPC composite beam bridge. The structure of the end of the profile steel is optimized, and the end of the profile steel is provided with the outer extending section, so that when the profile steel-UHPC composite plate obtained through the profile steel is connected through a wet joint, joint force transmission is more reliable, the tensile capacity is high, rigidity is high, various stress working conditions such as pulling,pressing, bending, shearing and twisting can be borne, and the joint can meet the full-section pulling condition.

The invention relates to a freight locomotive traction converter, in particular to a high-power permanent-magnet direct-drive freight locomotive traction converter. The high-power freight permanent-magnet direct-drive electric locomotive converter adopts two groups of independent traction main circuits, and each group of traction main circuits comprises a pre-charging function circuit, a four-quadrant power module, a four-quadrant chopping module, an independent intermediate loop, a traction inversion power module and a three-pole isolation contactor. Two sets of identical traction devices are arranged in one converter cabinet, and the shaft power output is larger than 1200kW, therefore the traction converter is suitable for permanent magnet direct drive system electric locomotives. According to the invention, the key technology of a high-power high-torque freight permanent magnet direct-drive electric transmission system can be broken through, energy can be saved for rail transit vehicles, environmental protection is realized, and economic benefits are brought.

An enhanced type shrinkage-compensating ultrahigh-performance concrete hollow plate hinge joint structure comprises web annular anchor bars, plate top annular anchor bars, joint top steel bar meshes,key tooth anchor bars and longitudinal steel bars which are distributed at the upper end and the lower end of the outer side face of webs of two adjacent concrete hollow plates and further comprises shrinkage-compensating ultrahigh-performance concrete poured into a hinge joint of the adjacent concrete hollow plates. The joint top steel bar meshes and the plate top annular anchor bars are arrangedon the tops of the concrete hollow plates, the plate top annular anchor bars are located on the two sides of the hinge joint and connected with the joint top steel bar meshes; key teeth are arrangedon the outer side faces of the webs of the concrete hollow plates, and the key tooth anchor bars are embedded in the positions, located in the protruding positions of the key teeth, of the concrete hollow plates; and the adjacent web annular anchor bars are connected in a lapping mode, and the longitudinal steel bars are arranged in the overlapped positions formed by lapping connection of the adjacent web annular anchor bars. The hinge joint structure is high in connecting strength, good in stress performance, high in durability, easy and convenient to construct and good in economic benefit.

The invention discloses a movable vehicle body supporting body suitable for different vehicle types of rail transit. The movable type vehicle body supporting body comprises a vehicle body frame, a supporting seat, lifting devices and moving devices, wherein the supporting seat comprises a supporting column and a supporting bottom plate, the supporting column is fixed on the upper surface of the supporting bottom plate, the supporting bottom plate is located below a vehicle body framework, the supporting column penetrates through the middle of the vehicle body framework and protrudes upwards, and a positioning device matched with the parking space of the rail transit vehicle body frame is arranged at the top end of the supporting column; the multiple lifting devices are fixedly arranged onthe vehicle body frame, and the lifting devices penetrate through the main structure of the vehicle body frame and extend downwards to be connected with the supporting bottom plate of the supporting seat and are distributed at the periphery of the supporting column and are used for lifting the supporting seat between a working state position where the supporting bottom plate is supported on the ground and the moving walking state position where the supporting bottom plate is suspended on the ground. The universal train body supporting equipment can be used for carrying out movable supporting on different vehicle bodies, and is simple in structure, convenient to use and low in manufacturing cost.

The invention discloses a variable pitch system for an offshore high-power wind driven generator group and a control method for the variable pitch system. The system comprises independent variable pitch driving systems on each blade, a variable pitch control system, a limit switch, an angular coder and a sliding ring, wherein the variable pitch driving systems are arranged in a hub on the front part of a cabin; the communication and the motive power of the variable pitch driving systems are realized through the sliding ring connected with the main control system in the cabin; and the variable pitch control system is used for allocating instructions from the main control system in the cabin to drivers and feeding back related signals detected by the angular coder, a rotation coder, the limit switch and a blade root sensor to the main control system in real time. In the variable pitch system, the force bearing acceleration sensor is arranged at a blade root and is used for detecting different applied forces of blades at different positions and feeding back to the variable pitch control system, and the variable pitch control system is used for sending a corresponding instruction to the driving systems, so that the size of a pitch angle is separately corrected, and the variable pitch system is completely independent.

The invention discloses a joint connecting structure of a profile steel-UHPC composite board. The profile steel-UHPC combined board comprises a plurality of profile steels and UHPC plates fixedly connected to the profile steels. The joint connecting structure comprises profile steel-UHPC combined plates which are adjacently arranged in the longitudinal direction of a bridge and transverse joint structures arranged between the profile steel-UHPC combined plates which are adjacently arranged in the longitudinal direction of the bridge. The transverse joint structures comprise transverse cast-in-place UHPC connecting parts located between the adjacent UHPC plates and fixing connecting pieces used for connecting the adjacent profile steel. The joint connecting structure can greatly reduce theself-weight and the manufacturing cost of a bridge deck slab, and has the advantages of being high in rigidity, durable and the like. The profile steel-UHPC composite board and common pavement are expected to become a special pavement scheme for completely replacing a traditional orthotropic steel bridge deck and steel bridge deck in the future and serve as a second bridge deck scheme to be provided for a large-span bridge.

The invention relates to a bridge effective prestress force on-way distribution and attenuation testing device comprising a data collector, a monitoring computer and an intelligent steel strand arranged in a bridge; the intelligent steel strand is formed by twisting a central filament and peripheral wires wound around the central wire, the central filament is a carbon fiber filament, an optical fiber provided with optical fiber grating sensors is arranged in the central filament, leading-out wires of the optical fiber grating sensors in the intelligent steel strand are connected to the data collector via an optical cable, the data collector communicates with the monitoring computer, collected prestress force of all points is transmitted to the monitoring computer which is used for receiving the prestress force of all the points, and therefore distribution conditions and attenuation conditions of effective prestress force of the bridge can be subjected to statistical analysis operation. The optical fiber grating sensors are distributed on prestress force ribs according to monitoring requirements, magnitude of effective prestress force of all points can be displayed, the distribution conditions of the effective prestress force can be rapidly and accurately reflected, and the attenuation conditions of effective prestress force can be tested over time.

The invention discloses a high-power permanent magnet direct-drive freight locomotive traction converter, and relates to the field of locomotive traction converters. The converter comprises two groups of independent traction main loops, wherein each group of traction main loops comprises a pre-charging loop, a four-quadrant power module, a four-quadrant chopping power module, an independent intermediate direct-current circuit, a traction inversion power module and a three-pole isolation contactor; the electrical principles and structures of the two traction main loops are completely the same. Each intermediate direct-current circuit comprises an energy storage circuit and a measurement and protection circuit; each energy storage circuit is used for stabilizing the voltage of an intermediate loop, each measurement and protection circuit is composed of a grounding measurement circuit, an intermediate voltage sensor and a voltage detection board, and a three-pole isolation contactor is arranged between the traction inversion power module and a permanent magnet synchronous motor. And each three-pole isolation contactor is connected with a three-phase traction inverter INV2 and a permanent magnet synchronous motor through copper bars. The problem that a traction converter of a high-power freight electric locomotive cannot be directly applied to a permanent magnet direct-drive electric transmission system is solved.

The invention relates to a method for evaluating the concrete surface coating to prolong the durability life of a concrete structure, which mainly includes the following steps: (1) preparing concrete specimens and curing them; (2) after the surface of the specimens is dry, partially test One part is coated with concrete surface coating, and the other part is not coated with concrete surface coating; (3) After the coating is cured, the concrete specimen is exposed to a chloride salt environment; (4) After exposure to different ages, the specimen is taken out (5) According to Fick's second law, quantitatively evaluate the concrete surface coating to extend the durability life of the concrete structure. The invention has the advantages that: the invention can quantitatively calculate and evaluate the concrete surface coating to prolong the durability life of the concrete structure, realize the precise design of the protection life of the coating, and ensure the durability and service safety of the concrete structure.

The invention relates to the field of damping devices, in particular to a magnetic lead screw type axial eddy current damper. The damper comprises an end, an eddy current damping assembly, a magnetic screw and a magnetic nut in running fit with the magnetic screw, and the end is in running fit with the magnetic nut. The eddy current damping assembly can be driven to conduct damping motion through mutual rotation between the magnetic screw and the magnetic nut, the end, away from the end, of the magnetic screw is used for being connected with one of two relative vibration points of a controlled structure, and the end is used for being connected with the other point of the two relative vibration points of the controlled structure. According to the magnetic lead screw type axial eddy current damper, the limit rotating speed of a motion conversion and amplification mechanism composed of the magnetic screw and the magnetic nut is basically not limited in a macroscopic range, and therefore the problem of the limit rotating speed does not exist theoretically. In addition, a magnetic field is not affected by temperature reduction, and the magnetic lead screw type axial eddy current damper can be continuously used in special low-temperature environments such as space.

The invention discloses an eddy current axial damper. The eddy current axial damper comprises a screw, a nut, a fixed drum, an inner rotating drum and an outer rotating drum. The fixed drum sleeves the outer side of the screw. The inner rotating drum is connected with the nut and arranged between the screw and the fixed drum in a sleeving mode. Magnets are arranged on the periphery of the inner rotating drum, and a conductor pipe is arranged on the inner wall of the fixed drum. The outer rotating drum is connected with the nut and sleeves the outer side of the fixed drum. A conductor pipe is arranged on the inner wall of the outer rotating drum, and magnets are arranged on the periphery of the fixed drum. According to the eddy current axial damper, two sets of module connection are formedbetween the inner rotating drum and the fixed drum and between the outer rotating drum and the fixed drum, the sizes are not mutually affected, the parts can be independently designed, and modularizedproduction and combination are achieved. By means of multiple combination modes such as inner and outer rotation, inner rotation and outer rotation, the requirements for the damper size limitation, the damping force inertia force change mode and the heat dissipation efficiency are met. The structure comprises a movement conversion mechanism and an eddy current damping generator. The eddy currentdamping generator is free of the frictional loss, after the service life of the damper ends, only the movement conversion mechanism needs to be replaced, the eddy current damping generator can continue to be used, and therefore the life cycle cost is reduced.

The invention relates to a fabricated concrete-filled steel tube double-layer gate-type pier structure which comprises an upper-layer gate-type pier and a lower-layer gate-type pier, and the upper-layer gate-type pier and the lower-layer gate-type pier are compositely connected through welding and post-tensioned prestressed reinforcements. The fabricated concrete-filled steel tube double-layer gate-type pier structure has the advantages that the double-layer gate-type pier is a structure which is composed of the double-layer stand columns and the cover beams, loads are transmitted to a foundation, under the background that urban land is increasingly strained, the double-layer gate-type pier provides a mode for building a double-layer bridge, the requirements for the line shape and the gradient in road design can be effectively met, the use efficiency of urban traffic is improved as much as possible in a limited urban space, the contradiction between urban land resources and traffic construction is relieved, and the method becomes the trend of urban bridge development.

The invention discloses a tool-free linkage locking and pulling device for an LRM, which can take plugging, pulling and locking into consideration and achieve tool-free operation. According to the technical scheme, a spring bolt is connected with an LRM case rib through a pulling block at the tail end of a pulling rocker arm handle, under the action of external force F, the spring bolt is in linkage in the displacement direction of the pulling block, and in the process that an LRM electronic module is inserted into the LRM case, the pulling rocker arm handle is manually operated with the help of pushing force of a shifting fork on a rotating pair, a rotating shaft in a lug shaft hole of an elbow fork is used as a fulcrum, the lever is linked with a roller and the shifting fork, and the roller is shifted left and right in a shifting groove of the LRM case by utilizing a crank force arm on the fulcrum of the pulling rocker arm handle to drive a locking device to apply push-pull pressure, so that locking or unlocking of push-in / pull-out switching of the LRM in a locking slot of the LRM is realized. The pulling rocker arm handle can be directly operated and locked to complete insertion, pulling and locking of the electronic module, tools such as a screwdriver are not needed, and the operation is convenient.

The invention discloses a prefabricated superposed reinforced concrete arch culvert, which comprises a cast-in-place reinforced concrete foundation 1, prefabricated inverted-T shaped wallboards 2, a prefabricated cover plate 3 with bracket legs, a prefabricated arch plate 4, an inner post-cast reinforced concrete bottom plate 5, outer post-cast reinforced concrete side bars 6 and post-cast reinforced concrete triangular bars 7. The prefabricated cover plate 3 with bracket legs is provided with lower bracket legs 8 and upper bracket legs 9. A whole arch ring is non-sensitive to subgrade and foundation settlement difference and resistant to cracking, the lateral sides of the arch ring are vertical in fabrication, the cover plate is horizontal in fabrication, and the wallboards are horizontal in fabrication. The prefabricated superposed reinforced concrete arch culvert is safe and convenient in construction, fast in speed, high in quality, high in durability, wide in application and satisfactorily functional.

The invention relates to freight locomotive traction converters, in particular to a high-power permanent magnet direct-drive freight locomotive modular traction converter. A traction device is installed in a traction converter cabinet, the traction device is composed of a pre-charging circuit, a four-quadrant power module, a set of intermediate circuit, an inversion power module and an isolation contactor, and the traction device drives a permanent magnet synchronous motor. The two sets of traction devices are identical in electrical principle and structure, cooling systems are independent of each other, and the redundancy of the systems is increased. As the permanent magnet direct drive traction system has the advantages of high efficiency, high power density, full life, low cost, low noise and the like, the development direction of high efficiency, energy conservation and environmental protection at present is represented, and the high-power permanent magnet direct-drive electric locomotive converter serves as a core device of a permanent magnet direct-drive electric transmission system. According to the invention, the key technology of a high-power high-torque freight permanent magnet direct-drive electric transmission system can be broken through, energy can be saved for rail transit vehicles, environmental protection is realized, and economic benefits are brought.

The invention discloses a high-strength reinforced concrete segment for tunnel support and a production method thereof. In raw materials for production of C45, C50,C55 conventional high-strength concrete segments, 35-40 kg of inorganic nanomaterials and 6-8 kg of polypropylene crude fibers are added into each cubic meter of concrete; through the improving effect of the inorganic nanomaterials on grain grading and an interface microstructure, the bonding condition of the polypropylene crude fibers and a concrete interface is improved and the bond stress of the polypropylene crude fibers and theconcrete interface is increased while the compactness of the concrete is improved, and thus the performance such as tensile resistance, compressive resistance, bending resistance and seepage resistance of the produced novel reinforced concrete segment is improved significantly. According to the high-strength reinforced concrete segment for tunnel support and the production method thereof, the problem that the performance of the conventional high-strength reinforced concrete segments is limited by the production raw materials and difficult to improve is solved, meanwhile, the problems that theappearance and quality defects, affecting the performance of the segment, of surface honeycombs, pitted surfaces, microcracks, corner damage and the like are likely to occur in the production processof the conventional high-strength reinforced concrete segments are also solved, and the whole life cost of a diversion tunnel is effectively reduced while the long-term stability of the tunnel undercomplex geological conditions is ensured.

The invention discloses a formula of Ni-P-nanometer TiO2 composite plating liquid for copper alloy surfaces and a plating process. The formula comprises 26-34 g / L of nickel sulfate, 22-38 g / L of sodium hypophosphite, 8-16 g / L of anhydrous sodium acetate, 10-20 g / L of citric acid, 20-30 mL / L of lactic acid, 4-8 g / L of nanometer TiO2 after ball milling dispersion, and 40-60 mg / L of surface active agent lauryl sodium sulfate. The plating process of composite plating layers comprises the following steps: copper alloys are polished for ultrasonic alkali washing, acid washing and weak acid activation, and then, are positioned in composite plating solution to control the H value and the temperature for plating; and nanometer TiO2 and Ni-P are co-deposited on the surfaces of copper alloy basal bodies to form amorphous composite plating layers. The plating layers have the advantages of smooth surfaces, uniform distribution of TiO2, high hardness, good wear resistance and high bonding strength with the basal bodies.

The invention discloses a water-coupled charging blasting demolition method for a reinforced concrete beam or column. The process that blast holes are formed along the axis of the reinforced concrete beam or column and water is poured into the blast holes is adopted, and the aims of reducing resistance of deep hole charging, achieving accurate charging, efficiently utilizing water pressure blasting energy, effectively controlling the strength and amount of vibration of blasting, blasting flyrock, air shock waves and poisonous blasting gas and reducing blasting dust are achieved. According to the method, the process is simple, operation is easy, the application range is wide, and the method is an ideal construction method for demolition of the reinforced concrete beam and column.

The invention discloses a longitudinal bridge direction joint connecting structure of a profile steel UHPC composite plate, a steel beam is arranged below the profile steel UHPC composite plate, a longitudinal stiffening plate is arranged at the transverse end part of the profile steel UHPC composite plate, a bearing platform plate is arranged on a side web plate of the steel beam, the longitudinal bridge direction joint connecting structure comprises cast-in-place connecting parts and reinforcing connecting pieces, wherein the cast-in-place connecting parts are arranged among the profile steel UHPC composite plates, the side webs and the bearing platform plates, and the reinforcing connecting pieces extend into the cast-in-place connecting parts. The reinforcing connecting pieces comprisetransverse shearing force connecting pieces arranged on the longitudinal stiffening plates and the side webs and vertical shearing force connecting pieces arranged on the bearing platform plate. Theinvention further provides a longitudinal-bridge-direction joint connecting structure located between the adjacent profile steel UHPC composite boards. The longitudinal-bridge-direction joint connecting structure has the advantages of being light in dead weight, high in tensile capacity and the like, and a bridge deck of a profile steel UHPC composite board adopting the longitudinal-bridge-direction joint connecting structure is expected to completely replace a traditional orthotropic steel bridge deck in the future.

The invention discloses a design method and system for an aircraft with a multi-engine layout modular structure, the multi-engine layout comprises 2-3 engines, and an aircraft body structure of the modular structure comprises three component structures including an aircraft back cabin, a middle aircraft body cabin and an aircraft belly cabin of an aircraft body and various cabin door structures on the aircraft body; wherein the connecting and mounting positions of wings on the aircraft body can be adaptively adjusted. The layout of three engines is optimized, and the modular structure design is combined, so that continuous and safe flight of three engines or double engines is realized, the engines are convenient to use and maintain, and the attendance rate is increased. And a weight center-of-gravity monitoring scheme of the aircraft is designed for a user. And the module structure design is convenient for shortening the refitting development period, reducing the cost and improving the value.

The invention relates to a periodically arranged sparse array antenna and an arrangement method thereof. The array antenna includes S antenna periodic structures, and each antenna periodic structure includes N1 transmitting antennas and N2 receiving antennas. The N1 transmitting antennas are arranged in a first straight line, the N2 receiving antennas are arranged in a second straight line, the first straight line is parallel to the second straight line, and the first straight line is located above or below the second straight line. The S antenna periodic structures are sequentially arranged into an array antenna, the array antenna comprises M equivalent phase centers, and the M equivalent phase centers are arranged in an equidistant straight line, wherein a midpoint between any one of thereceiving antennas and any one of the transmitting antennas in the array antenna is an equivalent phase center, and 1-S(N1+N2) / M is larger than 0. The use of the periodic structures facilitates the formation of reusable standard modules, the improvement of product consistency is facilitated, maintenance parts are reduced, the maintainability is improved, and the full life cost of a product is reduced.

The invention discloses an application of modular shipbuilding in the construction of a semi-submersible platform. The semi-submersible platform is divided into a living area module, a deck package module, a column and a buoy module; the specific process is as follows: first, the column and the buoy The box module is positioned on the pier, and then the deck bag module is hoisted. After the deck bag module is assembled and welded to 80%, the living area module is hoisted and finally completed. The semi-submersible platform in the present invention is a high-tech and high-value-added product, and its construction technology almost covers the cutting-edge technology of the shipbuilding industry. It takes a lot of energy to ensure the quality and safety of platform construction in terms of technology. The purpose of modular shipbuilding is mainly to reduce the cost of the entire life cycle and maintain the advanced nature of the platform system, to speed up the construction cycle, to upgrade flexibly, and to facilitate the installation of new systems. The modular construction in this patent can meet the characteristics of large platform size, difficult construction and tight construction period, so it can also be extended to the construction of conventional ships and FPSO oil storage ships.