JT/T 1283.2-2019Inflatable buoyancy hovercraft--Part 2: Periphery inflatable hovercraft (English PDF)

Foreword

JT/T 1283 "Full cushion airbag floating body hovercraft" is divided into 3 parts.

--- Part 1. Side airbag hovercraft;

--- Part 2. Surrounding airbag hovercraft;

--- Part 3. Hovercraft airbag.

This part is the second part of JT/T 1283-2019.

This section is in accordance with GB/T Draft the rules given in 1-2009.

Please note that some content in this section may involve patents, and the issuing authority of this standard does not assume responsibility for identifying these patents.

This part is proposed and managed by the National Inland Waterway Standardization Technical Committee (SAC/TC 130).

This section was drafted. Shanghai Feilang Hovercraft Co., Ltd., Wuhan Classification Institute of China Classification Society, Shanghai Local Maritime Safety Administration, Shanghai Jiaotong University, China Academy of Aerospace Aerodynamics Technology.

Introduction

The wall airbag hovercraft is a new type of hovercraft with the structural characteristics of a rigid inflatable boat and the amphibious performance of a full-cushion hovercraft.

In order to adapt to the application and development of air-cushioned ships with surrounding airbags, to meet the needs of China's tourism, leisure and entertainment, business, flood relief and emergency rescue Increasing demand in areas such as this, to ensure the safety of wall-mounted airbag hovercraft, develop this part of the standard.

JT/T 1283. 2-2019

Full cushion airbag floating body hovercraft Part 2. Surrounding airbag hovercraft

1 Scope

This part of JT/T 1283 specifies the classification and model, technical requirements, test methods, and marking, transportation and Storage requirements.

This section applies to navigation in calm waters of inland rivers and seas, restricted navigation, and travel on ice, snow, tidal flats, swamps, and beaches.

Design, construction and inspection of a wall airbag hovercraft with a total length of less than 8m. The rigid hull structure is similar while the flexible airbag consists of finger apron Hovercrafts replaced by similar devices can be used as a reference.

2 Normative references

The following documents are essential for the application of this document. For dated references, only the dated version applies to this article Pieces. For undated references, the latest version (including all amendments) applies to this document.

GB/T 13146 Hovercraft terminology GB/T 13306 plate GB/T 18815 View of the steering area of motorized dinghy GB/T 19310 Small boats permanently installed fuel systems and fixed fuel tanks GB/T 19311 Ultra-low voltage DC device for electrical system of dinghy GB/T 19312 Ventilation of petrol engine and/or petrol tank compartment of dinghy GB/T 19314. 1 Dimensions of hull structures and components for dinghies. Part 1. Materials. thermosetting resins, glass fiber reinforced plastics, Reference laminate JT/T 1283. 1-2019 Full-height airbag floating body hovercraft Part 1. Side airbag hovercraft JT/T 1283. 3-2019 Full-height airbag floating body hovercraft Part 3. Hovercraft airbag GJB 77 (all parts) PVC insulated nylon sheathed wire and cable for aviation Technical Regulations for the Survey of Coastal Small Ships of the Maritime Safety Administration of the People's Republic of China CCS Materials and Welding Code ISO 6185-3 Inflatable boats-Part 3. Boats with a total length of less than 8m and engines with a rated power of 15kW and above (Inflatable Boots-Pat 3. Boots Witness a hul llen thh 8m whit a mottor rating of 15kW (under the ground) ISO 12225-3 Dimensions of hull structures and structures for small craft Part 3. Materials. steel, aluminum alloy, wood, other materials (Small crt-Hull co-contracting and scanning-parts 3. Materials. Steel, aluminum alloys, word, office information ISO 12215-5 Small and small hull structure and component dimensions-Part 5. Design pressure, design stress and component dimensions for monohulls (Small craft-Hulll concentrating and scanning 5-Part 5. Dissipation presence, forsors, deductions, staging, etc.

scantlings determinatin ISO 12217-1 Assessment and classification of stability and buoyancy of dinghies. Part 1. Non-sail boats with a hull length of at least 6m (Small craft-Satellitly and buoyancy assent and card greener than or ezual too 6m) JT/T 1283. 2-2019

3 Terms and definitions

The following terms and definitions established in GB/T 13146, GB/T 19116, ISO 6185-3 and ISO 12217-1 apply to this document. in order to Easy to use, some of the terms and phrases in GB/T 13146, GB/T 19116, ISO 6185-3 and ISO 12217-1 are repeatedly listed below.

definition.

Peripheral airbag hovercraft perry inflated hovercraft the periphery has a flexible airbag structure. The entire mass of the hull is supported by the rigid structure and the buoyancy of the flexible airbag when it is stationary, and it is supported by an air cushion when sailing Support, using air propeller, hovercraft with amphibious performance.

Rigid inflatable boat inflatable boat the buoyancy structure consists of two basic parts. the rigid structure of the substructure to form the desired shape, and the inflatable or foam-filled shape Type non-rigid buoyancy tube, the volume of the buoyancy tube is not less than 50% of the total buoyancy volume of the boat.

Note. Excludes buoyancy tubes made of rigid aluminum, rotomolded polyethylene, GRP, or other rigid materials.

[ISO 6185-3.:2014, definition 3. 2] 3. 3 Propeller fan linkage system prograded on and symmetric One engine can drive the fan and propeller at the same time.

[GB/T 13146-1991, definition 2. 172] 3. 4 Combined propeller fan system fan fan heater system There is no air-lift fan, and the air-cushion system is generated by air propelling the propeller.

3. Five

Peripheral airbag perry inflated tube A buoyancy airbag is enclosed around the wall airbag hovercraft.

Finger apron

An apron consisting entirely of apron fingers.

[GB/T 13146-1991, definition 2. 59] 3. 7 Total length lens official Loa the horizontal distance from the ship's most forward to the most aft hull structure. This length includes flexible airbags, excluding both ends of the bow does not affect the boat Removable parts of the ship's structural integrity, such as movable projections such as rubber fenders and fenders.

Total width Breathovalll Boa at the widest point of the ship, the horizontal distance from the hull structure of one outboard to the other hull structure. This length includes flexible airbags, excluding Removable parts that affect the structural integrity of the ship, such as movable protrusions such as rubber fenders and fenders.

Mould deep depth

DWL/2

JT/T 1283. 2-2019

At the midpoint of the airbag waterline length Lwl, from the lowest point on the bottom of the airbag, include the wear strip (if applicable) to the top of the side panel (open boat) or Vertical distance of the upper edge of the side deck (deck boat).

3. 10

Inboard length lenghth Li the maximum distance measured between the foremost and the last section in the longitudinal direction of the hull cabin area.

3. 11

Buoyancy around airbag hovercraft buoyancy of a perry inflated hovercraft Computational buoyancy consisting of permanently fixed buoyancy, inflatable buoyancy, and rigid hull buoyancy.

3. 12

Permanent fixed buoyancy permanent buoyancy Buoyancy provided by a rigid, hull and cockpit with a lower density than fresh water in the middle without mesh foam or other materials.

[ISO 6185-3.:2014, definition 3. 7] 3. 13 Inflatable buoyancy Buoyancy provided by an airtight compartment sealed with compressed air.

3. 14

Rigid hull buoyancy Buoyancy provided by the drainage volume of the watertight portion of a rigid hull.

3. 15

Min. Operating state minimizing conion Boats in the state of empty boat plus the following.

a) Located at the highest control station on the centerline of the boat, the mass of one occupant, 75 kg;

b) Non-consumables and equipment normally carried on board are not included in the manufacturer's standard equipment list.

Note. The weight symbol of the boat in the minimum operating state is expressed in mMO, and the unit is kilogram (kg).

[ISO 12217-1.:2015, definition 3. 4. 3]

4 Classification and model

4.1 classification of surrounding airbag hovercraft the wall airbag hovercraft is classified as follows.

a) divided into fiber reinforced plastics and aluminum alloys according to the hull materials;

b) divided into aviation engines, gasoline engines and diesel engines by engine type;

c) According to the propulsion lifting system, it is divided into a propeller fan linkage system and a propeller fan integrated system.

4.2 Wall hovercraft models

Figure 1 shows the model of the wall airbag hovercraft.

JT/T 1283. 2-2019

Figure 1 Model representation of a wall airbag hovercraft

Example 1.

A 4-seater aircraft engine paddle-fan linked fiber reinforced plastic wall-mounted airbag hovercraft with the model designation CSWLZ4H.

Example 2.

6-seater gasoline engine propeller fan combined with aluminum alloy wall airbag hovercraft, model number is CWLHZ6W.

5 Technical requirements

5.1 Environmental conditions Surrounding airbag hovercraft should be able to operate normally under the following environmental conditions.

a) the altitude does not exceed 3,500 m;

b) Ambient air temperature.-35 ° C to 45 ° C;

c) The seawater temperature does not exceed 32 ° C;

d) Waters with a Pompei wind rating of no more than 6 and a significant wave height of no more than 1 m;

e) ice, snow, tidal flats, swamps, beaches and other areas;

f) Slopes, trenches, potholes, drift ice, etc. that meet design constraints.

5.2 Hull

5.2.1 Hull structure the wall airbag hovercraft consists of a rigid hull structure and surrounding flexible airbags. The rigid hull structure consists of an inner shell and an outer shell, as shown in Figure 2 as shown.

5.2.2 Rigid hull

5. 2. 2. Hull materials the rigid hull materials can be made of fiber reinforced plastic and aluminum alloy. Fiber-reinforced plastic materials should meet GB/T 19314. 1 or current Requirements for Materials and Welding Code. Aluminum alloy materials shall meet the requirements of ISO 1221513 or the current Code of Materials and Welding.

5.2.2.2 Structure

The rigid hull of the wall airbag hovercraft is a plate and shell structure composed of an inner shell and an outer shell. The inner shell is watertight and the outer shell is connected to the airbag Then, an airway cavity is formed between the outer shell and the inner shell.

5.2.2.3 Structural strength

5.2.2.3.1 The hull structure shall be capable of withstanding the maximum static and dynamic loads on the hull that may be encountered while living in the prescribed navigation area, JT/T 1283. 2-2019 no impermissible deformation, damage, leakage or other defects impeding the safety of the ship.

Explanation.

1 --- air rudder; 4--airbag; 7 --- shell;

2 --- ducts and air propellers; 5 --- airbag fingers; 8 --- air holes;

3 --- protective net; 6 --- inner shell; 9 --- airway.

Figure 2 Schematic diagram of the structure of the wall airbag hovercraft

5.2.2.3.2 The strength of the rigid structure shall meet the requirements of ISO 12215-5 or other relevant structural codes; or pass 6. 2. 7 and 6. 5. 7 try Inspection and verification, any part or part of the hull, such as the cabin or seat, and all sides including deck and hull, cabin and coaming, airbag and hull Boundary interface, there should be no structural damage in the form of fracture, crack, tear, separation, etc.

5.2.3 Flexible airbag

5.2.3.1 Airbag strength and tightness the strength and tightness of the surrounding airbag should meet JT/T 1283. 3-2019 4. 2 requirements.

5.2.3.2 Airbag material the material of the surrounding airbag should conform to JT/T 1283. 3-2019 4. 5 requirements.

5.2.3.3 Airbag structure the airbag of the wall airbag hovercraft is an integral round cross-section tire structure arranged along the perimeter of the hull.

Closed compartment.

The bottom of the airbag can be provided with airbag fingers or wear-resistant strips.

5.2.3.4 Airbag separation

5.2.3.4.1 The partition of the surrounding airbag shall be symmetrically arranged as independent airtight compartments along the periphery.

5.2.3.4.2 The minimum number of compartments for independent airtight separation of the whole ship shall meet the requirements of Table 1.

JT/T 1283. 2-2019

Table 1 Minimum number of compartments for airtight separation

Size factor F (d) Number of compartments n < 10 2 ~ 3 >=10 4 F (d) = Loa + Boa where. Loa --- the total length of the ship, in meters (m);

Boa --- the total width of the ship, in meters (m).

5.2.3.5 Airbag compartment volume

5.2.3.5.1 The volume of the buoyancy compartment of the maximum airbag shall meet the requirements of 5.5. 4. 4 provisions.

5.2.3.5.2 The volume of each independent airtight compartment shall be within ± 20% of the average compartment volume, see equation (1).

N (1 ± 20%) (1)

Where. Vc --- the volume of each independent compartment, the unit is cubic meters (m3);

V --- the total volume of the inflatable airbag, in cubic meters (m3);

N --- the number of independent airbag compartments.

5.2.3.6 Airbag installation

5.2.3.6.1 The integral airbag and the rigid hull shall be firmly connected, and the upper part of the airbag may be connected by stainless steel bolts with metal beading or molding the ears are fixed on a rigid hull. The connecting bolts should be properly spaced so that the airbag fits tightly with the rigid hull.

Note. The connecting ear refers to a strip-shaped attachment adhered to the airbag capsule, and is used for connection and installation between the airbag and the rigid hull, and between the airbag and the airbag fingers.

5.2.3.6.2 Airbag and airbag fingers can be connected by plastic bead with stainless steel bolts Pick up. The connection of airbag fingers should be easy to disassemble and replace.

5.2.3.7 Working pressure the working pressure is determined by the manufacturer and should comply with JT/T 1283. 3-2019 4. 2. 1 requirements.

The working pressure shall be indicated in the corresponding compartment or operation manual, or both, and shall be indicated on the product label.

5.3 Functional parts 5. 3. Hull outfitting the materials and manufacturing methods used should be compatible with the hull itself. Any load bearing accessories on the wall airbag hovercraft are in accordance with 6. 2. 1 Bearing load the load shall not cause any damage to air and watertight integrity.

5.3.2 Manual lifting and handling device Enclosed airbag hovercrafts with buoyancy less than 9,000N should be equipped with lifting and handling devices. Boats with buoyancy of 9,000N or more should be lifted and moved.

The operation device is optional. The test of the artificial lifting and handling device shall meet the requirements of 6. 2. 2 test requirements.

5.3.3 Safety rope, handle and armrest Surrounding airbag hovercraft should be equipped with safety ropes and/or handles or handrails along the side of the ship according to the rated number of passengers, can be used when people fall into the water. The arrangement and performance of all safety ropes, handles or handrails should ensure that every occupant can hold it There is no danger of injury even when held for a long time.

When you press 6. 2. During the test specified in 3, the safety rope and handle device shall not be damaged.

Safety ropes and handles should also comply with 5. 3. 1 Requirements for hull outfitting. If safety ropes and handles also have manual lifting and carrying devices JT/T 1283. 2-2019 Functions, then they should also comply with 5. 3. 2 requirements.

5.3.4 Lifting device

5.3.4.1 Lifting device is optional equipment, lifting device should meet.

a) The design load is not to be less than 5 times the mass of the ship at the minimum operating condition;

b) The test load is not to be less than twice the mass of the ship in the minimum operating condition.

5.3.4.2 If it is proved by direct calculation that the strength of the lifting device components reaches 5. 3. 4. 1a) The design load requirements can be replaced by 5. 3. 4. 1b) Specified load test. When you press 6. 2. When the load test is carried out in accordance with the requirements of 4, there shall be no signs of permanent deformation or structural damage.

5.3.4.3 The lifting device used and its related accessories, such as slings,, etc., shall be described in the operation manual.

5.3.5 Valves

5.3.5.1 Inflatable valve the inflation valve assembly should be made of corrosion-resistant material and should not damage the hull airbag material.

The form and arrangement of the inflation valve installed on a wall airbag hovercraft shall ensure that.

a) the ship can be easily connected to the inflatable device whether on shore or in the water;

b) not hinder the occupants;

c) does not affect the manoeuvring of the ship;

d) does not affect the loading and unloading of the ship;

e) not be damaged or torn by cables, lifelines, movable structural components, or due to normal occupant activity, loading;

f) a cover is provided to seal the valve body separately, and the cover should be firmly connected to the valve body to prevent accidental falling off;

g) can control the pressure of the airbag in a controlled manner, and can be connected to a pressure gauge to measure the pressure;

h) Deflation of any one of the airbag compartments shall not cause leakage of air or gas from the remaining airbag compartments.

5.3.5.2 Air release valve the deflation of the airbag should be operated manually, either using an inflation valve or a separate deflation valve.

The bleed valve should be made of corrosion-resistant material and should not damage the hull airbag material. Design and installation position should meet 3. 5. 1b) ~ 5. 3. 5. 1h).

5.3.5.3 safety valve in order to prevent the pressure from exceeding the allowable value due to misoperation during the inflation or the increase of the external temperature, the airbag compartment can be provided with a safety valve. The safety valve should be controlled by Made of corrosion-resistant material and should not damage the hull airbag material. Design and installation position should meet 3. 5. 1b) ~ 5. 3. 5. 1) Requirements.

The opening pressure of the safety valve should be 1. 5 times, closing pressure should not be less than working pressure.

5.3.6 Paddles and Stands

5.3.6.1 Configuration requirements the wall airbag hovercraft shall be equipped with at least two oars.

Paddle frame is optional. The paddle-frame device shall comply with 5. 3. 6. 2 to 5. 3. 6. 5 requirements.

5.3.6.2 Use of oars and/or paddles Surrounded airbag hovercraft equipped with oars according to 6. 5. 5. The test of 2 is required, and the paddle operation shall be convenient and effective.

Surrounded airbag hovercraft equipped with paddle frame according to 6. 5. 5. The test shall be carried out in accordance with the provisions of 3. During the test, any component shall be free from structural damage or Permanent deformation and it should be clearly demonstrated that the stiffness of the paddle frame system is sufficient for paddling. The minimum range of motion of the paddle is 60 ° forward and After 60 °.

5.3.6.3 Strength of the paddle when you press 6. 2. During the test specified in Clause 6, structural damage shall not occur to the propeller frame or connected accessories.

5.3.6.4 Prevent abrasion and loosening JT/T 1283. 2-2019 the support surface of the propeller frame should be smooth to prevent wear. The propeller frame should be fastened to prevent accidental loosening.

5.3.6.5 Sealed

When the ship is sealed, facilities shall be provided for the placement of two paddles or paddles. The outer surface of the paddle frame should be smooth and free of sharp edges and sharp corners to prevent bagging.

Damaged equipment.

5.3.7 Towing device

Enclosed airbag hovercraft shall be provided with a towing device at the bow for securing the towline. Press 6. 5. The towing status of the ship during the test of There is no overburden or lifting tendency. After the test, the towing device and the hull should be free of any structural damage or permanent deformation.

5.3.8 Hull drain

Wall-mounted airbag hovercraft provided with integrally closed hulls or deck components not filled with closed-cell foam or equivalent materials shall be used for A setting that drains from the lower part of the ship.

Means shall be provided to prevent accidental discharge of oil.

5.4 Safety requirements for the entire ship

5.4.1 Maximum number of passengers the maximum allowable number of occupants should not be greater than the value calculated by formula (2).

0. 38-1 (2)

In the formula. n --- the maximum allowable number of occupants, the value of n should be rounded down to the nearest integer value, but the first decimal place is greater than 5, which can be increased by one child;

Li --- length inside the ship, in meters (m).

See 7. for manufacturer's nameplate display requirements. 1. 1. It should include at least one adult and not more than one child.

5.4.2 Maximum loading capacity the maximum loading capacity that the ship can carry should not be greater than the value calculated by formula (3).

m = (0.75 × v × 1 000)-mb (3) where. m --- the maximum load (including the personnel, equipment and fuel on board), the unit is kilogram (kg);

v --- the volume of the ship's buoyancy in cubic meters (m3);

mb --- the total mass of the ship provided by the manufacturer, including all permanently installed equipment provided with the ship. hull, accessories and similar it also includes the engine and drive system, but does not include fuel. The unit is kilogram (kg).

The total mass of the occupants should not exceed 5. 4. 2 The specified maximum loading capacity. Adult weight is calculated at 75kg, child quality Measure by 37. 5kg calculation (if applicable).

5.4.3 Static stability of the ship

5.4.3.1 Whenever the number of people on board reaches from 5. 4. 1 The maximum permitted number of passengers is still the minimum operating state, one of whom is in A when the board is in any position, the deck airbag hovercraft must not be wet on the deck.

5.4.3.2 When the number of people on board reaches 5. 4. 1 When the maximum allowable number of occupants is specified and they are all moved to one side of the hull, the wall airbag hovercraft shall it meets the requirements of the complete stability and stability test of the Current Technical Regulations for the Survey of Small Coastal Ships.

5.4.4 Residual buoyancy After the maximum airbag buoyancy compartment is damaged, the remaining buoyancy of the surrounding airbag hovercraft should be at least 5%. 4. 2 Specifying the maximum loading capacity JT/T 1283. 2-2019 100% buoyancy requirement.

5.4.5 Field of view of steering area the field of vision of the steering area should meet the requirements of GB/T 18815.

5.4.6 anti-slip measures all hull surfaces on which the occupants can walk shall be provided with a non-slip coating.

5.5 Amphibious performance

5.5.1 Surrounding airbag hovercraft shall be capable of operating on ice, snow, tidal flats, swamps, sandy beaches, etc., with predetermined climbing, span Ditch and obstacle crossing performance.

5.5.2 Loads under non-water environment conditions shall meet 4. 1,5. 4. 2 requirements.

5.5.3 The speed under non-water leveling interface conditions shall not be lower than the speed of sailing on the water under the same wind level.

5.5.4 The angle of climbing shall not be less than 8 °, and the length of climbing shall not be less than twice the total length of the wall airbag hovercraft.

5.6 Safety of mechanical devices 5. 6. 1. The engine compartment shall be separated from the passenger compartment to reduce the risk of fire and fire spread, as well as toxic smoke, heat, noise and vibration.

5.6.2 Engine components requiring frequent...