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Equivalent static load acquisition method, topology optimization method and system

An acquisition method and topology optimization technology, which is applied in design optimization/simulation, instrumentation, electrical digital data processing, etc., can solve the problems of unconsidered topological stress, equivalent static load cannot accurately reflect topological stress, etc. Achieve the effect of novel and beautiful shape, reasonable structural force and good optimization effect

Active Publication Date: 2021-09-21
CENT SOUTH UNIV
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Problems solved by technology

[0004] The invention provides an equivalent static load acquisition method, a topology optimization method and a system, which are used to solve the problem that the existing equivalent static load acquisition method does not consider the stress of the topology structure under the action of the moving load, resulting in the calculated equivalent static load. The load does not accurately reflect the technical problem of the topological force under the action of the applied moving load

Method used

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  • Equivalent static load acquisition method, topology optimization method and system
  • Equivalent static load acquisition method, topology optimization method and system
  • Equivalent static load acquisition method, topology optimization method and system

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Embodiment 1

[0037] Such as Figure 6 As shown, a method for obtaining an equivalent static load is disclosed in this embodiment, which includes the following steps:

[0038] Construct the solid model of the topology according to the actual engineering, and apply the moving load and self-weight load to the solid model to obtain the finite element model of the topology; solve the displacement field of the topology under the action of the moving load according to the finite element model; construct the equivalent static load and its generation Based on the principle that the displacement field generated by the equivalent static load at each moment is the same as the displacement field generated by the moving load at the same moment, the displacement field of the topology under the action of the moving load is substituted into the correlation equation, and the solution is obtained The equivalent static load of the topology.

[0039] In addition, in this embodiment, a topology optimization me...

Embodiment 2

[0045] Embodiment 2 is a preferred embodiment of Embodiment 1, and its difference from Embodiment 1 lies in that the specific steps of the topology optimization method are refined:

[0046] Such as figure 1 As shown, in this embodiment, a topology optimization method based on the equivalent static load method and the weighted strain energy method, considering the moving load effect and the self-weight effect is disclosed, including the following steps:

[0047] 1. Construct a topological solid model according to the actual project, and apply moving load and self-weight load to the solid model to obtain a topological finite element model;

[0048] Among them, the moving load is applied to the solid model as follows:

[0049] The two-way loading method proposed by the present invention handles moving loads, and regards the action of moving loads in two opposite directions as two mutually independent processes in one loading process. That is to say Represents a loading proces...

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Abstract

The invention discloses an equivalent static load acquisition method, a topology optimization method and a system, constructing a topology entity model according to engineering practice, and applying moving loads and self-weight loads to the entity model to obtain a topology finite element model; according to the finite The meta-model solves the displacement field of the topology under the action of moving load; constructs the correlation equation between the equivalent static load and the displacement field generated by it, based on the displacement field generated by the equivalent static load at each moment and the moving load at the same moment Based on the same principle as the generated displacement field, the displacement field of the topology under the action of the moving load is substituted into the correlation equation to solve the equivalent static load of the topology. Compared with the prior art, the present invention fully considers the dynamic effect of the moving load on the topology, and the calculated equivalent static load can accurately reflect the force situation of the topology under the action of the moving load, and then makes use of the equivalent static load to carry out The optimization effect of the topology optimization method is better.

Description

technical field [0001] The invention relates to the technical field of structural design and optimization, in particular to an equivalent static load acquisition method, a topology optimization method and a system. Background technique [0002] In topological structure design, for the convenience of calculation, the equivalent uniform load is generally used to replace the discontinuous distribution of the actual load on the topology. The existing equivalent load acquisition method generally derives the prestress equivalent The calculation formula and method of the load, however, this method does not consider the force of the topological structure under the action of moving load, resulting in the calculated equivalent static load cannot accurately reflect the force of the topology under the action of moving load, which in turn affects The optimization effect of the topology optimization method using this equivalent static load. [0003] Therefore, how to solve the problem th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/23G06F119/14
CPCG06F30/23G06F2119/14
Inventor 敬海泉罗楷明何旭辉
Owner CENT SOUTH UNIV
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