Method of Adjusting Weight and Center of Gravity in Total Strength Analysis Model of Jack-up Platform
A jack-up platform and analysis model technology, which is applied in the field of adjusting weight and center of gravity in the total strength analysis model of the jack-up platform, can solve the problems of low efficiency and poor accuracy of manual trial weight and center of gravity, and achieve accurate accuracy , the effect of improving efficiency
Active Publication Date: 2016-05-18
DALIAN SHIPBUILDING IND
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It is designed to improve the efficiency and accuracy of deployment, thereby solving the problems of low efficiency and poor accuracy of manual trial weight and center of gravity
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[0041] The weight of the main hull, the coordinates of the center of gravity and the coordinates of the constraint points in the actual design of a certain type of jack-up platform are shown in Table 1.
[0042]
[0043] Table 1 The realistic design parameters of a certain type of jack-up platform
[0044] In the total strength analysis model of the platform, the weight of the main hull and the coordinates of the center of gravity are realized by 9 mass spheres. At this time, adopt the method of this patent, adjust the weight and center of gravity coordinates of the model according to the following steps to make it the same as the main hull weight and center of gravity of the actual design listed in Table 1.
[0045] The parameters in Table 1 are substituted into the formula to obtain the weight of the main hull shared by each leg.
[0046] P F = 11392 × [ ...
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The invention discloses a method for regulating weight and gravity center of a self-elevating platform overall strength analysis model. Mass balls used for simulating weight and gravity center of a hull in real design are set on three upright beams of three pile legs of a self-elevating platform. The vertical positions of the mass balls are the same with the vertical position of the gravity center of the main hull in real design. According to parameter including coordinates of the weight and gravity center of the main hull in real design and coordinates of constraint points of the main hull in real design, the weight of the main hull shared by the three pile legs respectively can be acquired, and accordingly the weight of each mass ball can be acquired. By the method, accurate coincidence of the coordinates of the weight and gravity center of the main hull in the overall strength analysis model and the coordinates of the weight and gravity center of the main hull in real design can be realized, complicated operation of making up the gravity center in the prior art is omitted, efficiency is improved, the accuracy is up to 100%, and thus a solid foundation is laid for guaranteeing the accuracy of the follow-up strength analysis.
Description
technical field [0001] The invention relates to the improvement of the required weight and center of gravity allocation method when the finite element model is used for structural analysis in the design stage of marine engineering. Background technique [0002] like figure 1 As shown, the jack-up platform has three legs 1 in total, and the main part of the platform supported by these three legs 1 is called the main hull 3 . Around each leg, there are three vertical beams 2 connected to the leg, and they are distributed in an equilateral triangle with the constraint point A of the leg as the center. These 3 beams are predetermined in the design as part of the platform structure. figure 1 Among them, A is the constraint point of the three legs, the number 1 is the three legs, the number 2 is the vertical beam for setting the mass ball, the number 3 is the main hull, and the number 4 is the mass ball. In actual design, the vertical direction of the legs is usually the Z axis...
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IPC IPC(8): G06F17/50
Inventor 石强戴挺彭贵胜林海花
Owner DALIAN SHIPBUILDING IND