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Ship cabin rapid modeling method based on APDL language of ANSYS/LS-DYNA

A modeling method and cabin technology, applied in special data processing applications, instruments, electrical and digital data processing, etc., can solve problems such as error-prone, time-consuming and cumbersome, and inflexible design process, so as to increase reliability and reduce workload. , the effect of improving the efficiency of meshing

Inactive Publication Date: 2019-11-08
NAVAL UNIV OF ENG PLA
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  • Application Information

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Problems solved by technology

Due to the criss-cross structure of the stiffeners in the cabin, the common method of GUI modeling is prone to errors, and once the parameters are modified during the modeling process, the designer needs to re-model, and a lot of repetitive work will be done during the process, which is extremely time-consuming Cumbersome, making the design process inflexible

Method used

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  • Ship cabin rapid modeling method based on APDL language of ANSYS/LS-DYNA
  • Ship cabin rapid modeling method based on APDL language of ANSYS/LS-DYNA
  • Ship cabin rapid modeling method based on APDL language of ANSYS/LS-DYNA

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specific Embodiment 1

[0039] The parameter setting of specific embodiment 1 is as follows (in the brackets is the corresponding program language of instruction):

[0040] Establish a 1 / 2 cabin model with a length of 5m, a width of 4m, and a height of 2.5m. The default unit system is cm-g-μs / (PREP7), where the cabin width is 400cm (W=400); the length of the 1 / 2 cabin is 500cm (L= 500 / 2); cabin height 250cm (H=250); top bulkhead thickness 0.8cm (Tup=0.8); bottom bulkhead and side bulkhead thickness 0.8cm (Tdown=0.8);

[0041] 1.2) Set the unit type and material space of the model and basically define the bulkhead material: SOLID164 solid element is used, the Lagrangian space is used for the bulkhead, and the ALE material space is used for the gas outside the bulkhead and the explosive unit. The bulkhead material only needs Set the material number, and define the specific constitutive relationship and state equation through a separate calculation file.

[0042]1.3) Establish the geometric model of th...

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Abstract

The invention relates to a ship cabin rapid modeling method based on an APDL language of ANSYS / LS-DYNA. The method comprises the following steps: firstly, parameterizing each panel of a cabin and eachkey size of a reinforcing rib structure of the panel, then carrying out common node setting on an overlapping region of a cabin wall and a reinforcing rib by utilizing an APDL language, establishinga solid model of each panel and the reinforcing rib of the cabin, and quickly cutting the model by adopting a cyclic instruction, controlling a distance and changing the position and direction of a working surface; secondly, performing grid rapid division on the cabin model and the air domain by utilizing a hexahedron entity unit with a specific size, defining a welding structure between cabin walls by adopting a fixedly connected fracture contact model (TSTS), and establishing a ship cabin finite element analysis model. According to the method, a common node method and a fixed connection fracture failure method are adopted to define a single cabin wall inner welding structure, and the reliability of ship cabin indoor explosion test damage effect research is improved.

Description

technical field [0001] The invention relates to the technical field of hull modeling, in particular to a rapid modeling method for ship cabins based on the APDL language of ANSYS / LS-DYNA. . Background technique [0002] The analysis of the response of the cabin structure to the explosion load is one of the essential contents in the design of the ship structure and the evaluation of the damage power of the warhead. Due to the high cost of the implosion test of the equal-scale ship cabin, the test usually only obtains a set of working conditions. The results of the data under the condition are relatively large, and the results are quite accidental. Therefore, the combination of theoretical calculation and numerical simulation is often used to analyze the overpressure in the cabin, the deformation of the bulkhead, and the internal vibration. Among them, ANSYS / LS-DYNA is one of the more commonly used finite element analysis software, which is often used to solve nonlinear dynam...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 谭波王伟力苗润严平李昕孙世岩
Owner NAVAL UNIV OF ENG PLA
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