Optimization criterion method based constraint damping plate topological optimization method

A technology of constrained damping and topology optimization, which is applied in the fields of instrumentation, calculation, electrical digital data processing, etc., and can solve problems such as increasing economic costs and increasing structural weight

Inactive Publication Date: 2015-01-07
CHONGQING UNIV
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Problems solved by technology

Completely covering the surface of the controlled structure with the constrained layer damping material not only increases the economic cost, but also increases the weight of the structure

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  • Optimization criterion method based constraint damping plate topological optimization method
  • Optimization criterion method based constraint damping plate topological optimization method
  • Optimization criterion method based constraint damping plate topological optimization method

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Embodiment Construction

[0041] The present invention will be further described below in conjunction with drawings and embodiments.

[0042] figure 1 It is a flowchart of the topology optimization of the constrained damping structure, in this embodiment:

[0043] The constrained layer damping plate is 0.2m long, 0.1m wide, the thickness of the base layer is 0.0008m, the thickness of the viscoelastic layer is 0.0001m, and the thickness of the constrained layer is 0.00015m. The elastic modulus of the substrate is 70GPa, the Poisson's ratio is 0.3, the density is 2800kg / m3, the elastic modulus of the viscoelastic damping layer material is 12Mpa, the Poisson's ratio is 0.495, the density is 1200kg / m3, and the elastic modulus of the constrained layer is 70Gpa , Poisson's ratio is 0.3, the density is 2700kg / m3, and the material loss factor is 0.5. The restraint method of the constrained layer damping plate is full restraint at one end of the short side. The objective function is to maximize the loss fact...

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Abstract

The invention discloses an optimization criterion method based constraint damping plate topological optimization method to solve the problem of optimization arrangement of constraint damping materials of a constraint damping plate. The optimization criterion method based constraint damping plate topological optimization method specifically comprises interpolating the constraint damping materials through an SIMP model and establishing a topological optimization model of the constraint damping plate; establishing a finite element model of the constraint damping plate, performing modal analysis on the finite element model, calculating the sensitivity of constraint damping cell units according to a sensitivity calculation formula, solving the topological optimization model through an optimization criterion method and obtaining a topological optimization construction of the constraint damping plate. According to the optimization criterion method based constraint damping plate topological optimization method, structural vibration response is effectively reduced and the utilization ratio of the constraint damping materials is improved by optimizing the arrangement of the constraint damping materials under the condition that certain constraint damping materials are added.

Description

technical field [0001] The invention relates to an optimal design method of a constrained damping structure, in particular to a constrained damping plate topology optimization method based on an optimization criterion method. Background technique [0002] Vibration and noise reduction technology has always been an important topic in the field of engineering design. At present, the common method is to adhere a layer of constrained damping material on the surface of the vibrating structure. Because the passive constrained layer damping structure is easy to use and saves space, the original design does not need to be changed, and the vibration of the structure can be effectively suppressed in a wide range of temperature and frequency. Therefore, it is widely used in aviation, aerospace and high-speed trains and other fields. Completely covering the surface of the controlled structure with the constrained layer damping material not only increases the economic cost, but also in...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCY02T90/00
Inventor 郑玲房占鹏柳成峰李以农
Owner CHONGQING UNIV
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