GB/T 37307-2019 in English
VALIDDesign requirements of offshore helicopter decks
- Issued on:2019-03-25
- Implemented on:2019-10-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$243.00
《GB/T 37307-2019海洋平台用直升机甲板设计要求》由TC12（全国海洋船标准化技术委员会）归口，主管部门为国家标准化管理委员会。
Introduction
Interpretation of GB/T 37307-2019, the National Standard of the People's Republic of China
Background and Significance of the Standard
GB/T 37307-2019 "Design Requirements for Helicopter Deck for Offshore Platforms" is an important standard formulated to regulate the design of helicopter decks for offshore platforms. This standard is proposed and managed by the National Technical Committee for Standardization of Marine Vessels, and aims to ensure the safe take-off and landing and operation of helicopters on offshore platforms.
Scope of Application
- Applicable to the design of helicopter decks for steel or aluminum offshore platforms.
- Covering terms and definitions, structural classification and material selection, design loads and design conditions, structural design requirements, etc.
Component Category and Material Selection
Component Classification
According to the loads, stress levels and modes borne by the components, helicopter platform components are divided into secondary components, primary components and special components. This classification method helps to optimize the design and ensure structural safety.Material Selection Requirements
The standard clearly specifies the selection requirements for steel and aluminum alloys, including:
- Steel Grade: Select the appropriate grade of steel according to the component category, minimum design temperature and thickness.
- Aluminum alloy material: The normal operating ambient temperature should be lower than 100°C and meet the requirements of GB50429-2007.
Design load and working condition analysis
| Working condition category | Load type | Calculation formula | Applicable conditions |
|---|---|---|---|
| Uniform load | Uniform load on the entire deck area | - | Applicable to deck load under normal operating conditions. |
| Landing force | Vertical impact load | - Normal landing: $P_{H} = 1.5P$ or $P_{H} = 1.75P$ - Emergency landing: $P_{H} = 2.5P$ | Consider the helicopter type and landing gear arrangement. |
| Lateral force | Load distribution in the horizontal direction | $P_{c} = 0.5P$ | Related to the position of the helicopter landing gear. |
Interpretation of structural design requirements
Deck thickness calculation
The standard provides a detailed method for calculating deck thickness, especially for steel helicopter deck and aluminum ribbed plate deck. The following are typical application scenarios:- When the frame spacing is 460mm, the minimum thickness of the steel deck is 4.0mm.
- For the aluminum deck, its thickness needs to be determined by finite element analysis to meet the structural strength requirements.
Support structure design
The standard stipulates that the size of the deck longitudinal girder and the supporting structure should be determined based on stress analysis, and clarifies the different value ranges of the allowable coefficient $η_{0}$ (see Table 2).
Helicopter deck layout requirements
Barrier-free zone and landing ring design
The barrier-free zone of a helicopter deck consists of two parts:- Area above the plane: The peripheral interface is a horizontal plane, and the corresponding arc angle is not less than 210°.
- Area below the plane: Extending downward to the sea level with a slope of 5:1, the corresponding arc is not less than 180°.
Firefighting and safety facilities
The standard emphasizes the importance of deck firefighting facilities, including: fixed foam fire extinguishing system, dry powder fire extinguisher and no smoking signs. These requirements are intended to minimize fire risks and ensure personnel safety.
Implementation recommendations
- During the design process, give priority to material specifications and grades specified in the standard.
- Design the deck and supporting structure strictly in accordance with the thickness requirements in the table.
- Consider the impact of environmental factors on the deck structure, especially the effects of temperature and wind loads.
- Strengthen the strength check at the nodes to ensure that the connection method meets the standard requirements.
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