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Compliant mechanism topological optimization method based on static strength and fatigue constraint

A compliant mechanism and topology optimization technology, which is applied in the field of topology optimization of compliant mechanisms based on static strength and fatigue constraints, can solve the problems that compliant mechanisms are difficult to meet the requirements of static strength and fatigue strength.

Active Publication Date: 2020-09-04
EAST CHINA JIAOTONG UNIVERSITY
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  • Abstract
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Problems solved by technology

At present, the compliant mechanism obtained by the existing topology optimization method is often difficult to meet the requirements of static strength and fatigue strength, so it cannot meet the needs of actual engineering

Method used

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  • Compliant mechanism topological optimization method based on static strength and fatigue constraint
  • Compliant mechanism topological optimization method based on static strength and fatigue constraint
  • Compliant mechanism topological optimization method based on static strength and fatigue constraint

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Embodiment Construction

[0106] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0107] In order to make the above objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0108] refer to figure 1 , the present invention provides a method for topology optimization design of compliant mechanisms based on static strength and fatigue constraints, including t...

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Abstract

The invention discloses a compliant mechanism topological optimization method based on static strength and fatigue constraint. The compliant mechanism topological optimization method comprises the following steps: evaluating the static strength and fatigue strength of a compliant mechanism; converting static strength and fatigue constraints of the mechanism into different stress constraints, and aggregating various stress constraints of the unit into different global stress constraints; constructing a compliant mechanism topological optimization model based on static strength and fatigue constraints by taking output displacement maximization as a target function and taking static strength, fatigue and volume as constraints; carrying out sensitivity analysis correcting the sensitivity through mapping filtering, solving the topological optimization problem, carrying out iteration till the convergence criterion is met, and obtaining the optimal compliant mechanism topological structure. According to the method, the von Mises with symbols and the corrected Goodman fatigue criterion are used for carrying out topological optimization on the compliant mechanism based on static strength and fatigue constraint, the obtained compliant mechanism can meet the requirements for static strength and fatigue strength, and a hinge-like structure is effectively avoided.

Description

technical field [0001] The invention relates to the related technical field of compliant mechanism design, in particular to a topology optimization method of compliant mechanism based on static strength and fatigue constraints. Background technique [0002] Compliant mechanism is a new type of assembly-free mechanism that uses the deformation of flexible elements to transmit motion, force or energy. Compared with the traditional rigid mechanism, it has the following advantages: 1) material saving and low manufacturing cost; 2) no assembly and high precision; 3) no lubrication required; 4) easy integration of modern drive technology. Due to the above advantages of the flex machine, it has been widely used in the fields of micro-electromechanical systems, micro / nano manufacturing, precision positioning, precision operation, precision and ultra-precision machining. [0003] At present, the topology optimization method is a common design method for compliant mechanisms. This me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/17G06F30/23G06F111/04G06F119/14
CPCG06F30/17G06F30/23G06F2119/14G06F2111/04Y02T90/00
Inventor 占金青孙宇汪庭威刘敏尹来容赵延
Owner EAST CHINA JIAOTONG UNIVERSITY
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