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A method for analyzing that coupling characteristic of mortar base plate and soil

A characteristic analysis and mortar technology, applied in special data processing applications, instruments, geometric CAD, etc., can solve the problems of less analysis and research on the force law of mortar bases, and achieve the effect of strong engineering practical value

Inactive Publication Date: 2019-03-26
NANJING UNIV OF SCI & TECH
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Problems solved by technology

In the existing literature, there are few studies on the analysis of the force law of the mortar seat plate under different types of soils combined with the soil constitutive model.

Method used

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  • A method for analyzing that coupling characteristic of mortar base plate and soil
  • A method for analyzing that coupling characteristic of mortar base plate and soil
  • A method for analyzing that coupling characteristic of mortar base plate and soil

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Embodiment

[0027] In this embodiment, the trapezoidal pyramid base plate and the common clay in Nanjing are used as examples for test simulation. The finite element model structure of the mortar base plate is as follows figure 2 shown.

[0028] Establish a finite element model of the seat plate structure and soil coupling in HyperMesh, such as image 3 and Figure 4 shown. The material of the mortar seat plate is TC4 titanium alloy, and its material performance parameters are shown in Table 1. The compacted hard clay is selected as the soil, and its material performance parameters are shown in Table 2. The soil model is 1.5-2.5 times the length of the seat plate.

[0029] Table 1 The parameters of the mortar seat sheet material

[0030] part

material material

Density / (tonne·mm -3 )

Elastic modulus / MPa

Poisson's ratio

seat plate

Titanium alloy

4.51×10 -9

1.0×10 5

0.34

[0031] Table 2 Parameters of soil materials

[0032] ...

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Abstract

A method for analyzing coupling characteristic of mortar base plate and soil includes such steps as carrying out finite element model of mortar base plate; Secondly, different types of soil are modeled by finite element method by using linear elastic-ideal plastic constitutive model which can be directly used under complex stress conditions. Secondly, the contact between mortar base plate and soilis established, and the constraint on the periphery of soil is established, and the model of mortar base plate-soil is constructed. Then the dynamic finite element analysis of the mortar base plate-soil model is carried out and the stress distribution between the base plate and soil is obtained. Finally, the finite element model is topologically optimized, and the load transfer path inside the mortar base plate is obtained. The invention solves the stress distribution law of the mortar base plate under different types of soil, and obtains the stress distribution and the load transmission pathof the base plate through the finite element simulation calculation of the base plate and the soil.

Description

technical field [0001] The invention relates to mortar structure design and dynamic analysis technology, in particular to a method for analyzing the coupling characteristics of a mortar base plate and soil. Background technique [0002] The mortar is a curved smoothbore artillery that directly bears the recoil force with the seat plate. Since there is no anti-recoil device, the launch load of the mortar directly acts on the seat plate, and the anti-recoil is realized by the deformation of the soil under the seat plate. At present, the size and mass of the large-caliber mortar base plate are relatively large, which is not conducive to the carrying and transportation of soldiers. Therefore, the lightweight of mortars is of great significance. In the lightweighting of mortars, the strength analysis of the seat plate should be considered first. Wang Pengxiang used the static analysis method to analyze the structural strength of the seat panels of two different materials placed...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/17G06F30/23
Inventor 王振葛建立杨国来孙全兆陈吉谢新宇李朝辉
Owner NANJING UNIV OF SCI & TECH
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