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Determination method of launching sliding force of variable gradient berth

A technology to determine the method and change the slope, which is applied in the direction of berth, ship, transportation and packaging, etc., and can solve the problems of not being able to obtain sliding force data and engineering dangers

Inactive Publication Date: 2014-08-13
DALIAN SHIPBUILDING IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But in fact, the lack of accurate sliding force data will put the project in danger

Method used

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  • Determination method of launching sliding force of variable gradient berth
  • Determination method of launching sliding force of variable gradient berth
  • Determination method of launching sliding force of variable gradient berth

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Experimental program
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Embodiment Construction

[0026] as attached figure 1 As shown, suppose the included angle between the slipway and the horizontal plane is a, the weight of the water object is w, and the friction coefficient between the water object and the slipway is u.

[0027] For launching objects, there are two forces acting along the berth direction:

[0028] (1) The downward component of gravity along the berth w sina

[0029] (2) Friction force = u* support force of slipway = u* pressure of launching objects on slipway = u w cosa

[0030] Then the sliding force=w sina–u w cosa

[0031] This is the basic formula for calculating glide force.

[0032] to attach image 3 For example, the launching materials are distributed on several slipways with different slopes. The method commonly used now is to find the slope a of the slipway corresponding to the center of gravity, assuming that the weight of the launching material is w, then

[0033] Sliding force=w sina–u w cosa

[0034] Calculation method of the pre...

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Abstract

The invention discloses a determination method of launching sliding force of a variable gradient berth. The method comprises the following steps: S1, for a the ship built from stern to bow by segments, respectively calculating the weight of each ship segment corresponding to the berth segment through design and measurements: WS1, WS2, WS3...; S2, respectively calculating sliding force of each ship segment on each gradient of the berth: for a ship segment SL with the gradient of a, the coefficient friction between the launching subject and the berth is u, then the sliding force is SL1 of WSL1sina-u WSL1cosa; and using the same method to obtain the sliding force on other berth segment SL2, SL3, SL4...; and S3, acquiring sliding force on each gradient of the berth and the each gradient of the berth of the whole launching subject: for a berth segment SL with the gradient of a, the sliding force SL is SL1+sliding force SL2+sliding force SL3+sliding force SL4 +... The invention aims to obtain accurate launching sliding force of variable gradient berth in the design or construction phases, so as to guarantee the security of the project enforcement.

Description

technical field [0001] The invention relates to the determination of the glide force of a berth launching into the water during the ship design or construction stage, more specifically, the determination of the glide force during the launching process of a berth with a variable gradient. Background technique [0002] Ships or marine engineering products can be built on a dock or berth. If they are built on a berth, when the main construction work is completed, they need to slide into the water and be moored on the shore to continue the follow-up construction work. This process of sliding from the slipway into the water is called launching. [0003] Before ships or marine engineering products (hereinafter referred to as launching objects) are launched into the water, anti-slip devices need to be installed to resist the sliding force, so as to prevent the launching objects from sliding under uncontrollable conditions under the action of the sliding force and causing major engi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B63C3/00
Inventor 包岩马延德田天邓强陈晗
Owner DALIAN SHIPBUILDING IND