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Propeller blade with piezoelectric damping function for ship and preparation method thereof

A technology for propellers and ships, applied in the field of propeller blades for ships and their preparation, can solve the problems of uncontrollable dynamic mechanical properties, limited damping performance of the propeller structure, and decrease of the low-order main mode frequency of composite propeller blades, and achieves excellent overall performance. Structural mechanical properties, the effect of improving vibration and noise reduction performance

Active Publication Date: 2018-08-31
HARBIN INST OF TECH AT WEIHAI
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

However, existing studies have found that due to the existence of underwater inertia, composite propeller blades increase their additional mass by 6 times in underwater modal analysis. Since the natural frequency of the structure is inversely proportional to the mass, the composite propeller blade has a low-order The frequency of the main mode drops significantly, which causes the composite propeller to easily generate underwater low-frequency resonance in the wake field, causing underwater vibration and noise problems of the composite propeller that cannot be ignored
[0003] At present, most propeller blades made of composite materials are made of high-performance fiber-reinforced resin-based composite materials. Due to the uncontrollable dynamic mechanical properties of the fiber-reinforced resin-based composite laminate structure, the volume content of the resin matrix is ​​limited, and the damping performance of the resin matrix is ​​affected by temperature and frequency. Therefore, the damping performance of the fiber-reinforced resin-based composite propeller structure is limited, and it is impossible to effectively improve the vibration and noise reduction performance of the propeller blade through the fiber-reinforced composite material layup design

Method used

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  • Propeller blade with piezoelectric damping function for ship and preparation method thereof
  • Propeller blade with piezoelectric damping function for ship and preparation method thereof

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preparation example Construction

[0032] A method for preparing a ship propeller blade with piezoelectric damping, the specific steps are:

[0033] 1. According to the hydrodynamic performance requirements of the propeller, the cladding structure design of the piezoelectric damping composite core and the fiber-reinforced thermoplastic composite prepreg is carried out;

[0034] 2. Determine the proportions of piezoelectric ceramic powder, carbon nanotubes, and thermoplastic polymers in the core of piezoelectric damping composite materials, as well as the types of fiber-reinforced thermoplastic composite materials, according to the design requirements of the cladding structure, and carry out fiber-reinforced thermoplastic composite materials. Dip preparation;

[0035] 3. Cut the fiber-reinforced thermoplastic composite material prepreg to size, and put it into the upper and lower molds by manual method according to the design sequence and layer angle;

[0036] 4. Put the carbon nanotubes into the mixed acid sol...

Embodiment 1

[0042] A propeller blade for ships with piezoelectric damping, made of 80 parts by mass of piezoelectric damping composite material core and 200 parts by mass of T300 carbon fiber reinforced polyamide composite material prepreg cladding;

[0043] The core of the piezoelectric damping composite material is located in the middle of the propeller blade. It is composed of 5 parts by mass of lead dioxide piezoelectric ceramic powder, 0.09 parts by mass of acidified single-walled carbon nanotubes, and 100 parts by mass of polyamide at 210 ° C. After stirring evenly for 30 minutes, pour it into a mold and cool to room temperature to release the mold.

[0044] After the piezo-resistance damping composite material core is obtained, the unidirectional T300 carbon fiber reinforced polyamide composite material prepreg with a thickness of 0.4m is cut, and the side bevel angle of the blade is taken as the reference angle, according to The layup sequence of the piezoelectric damping comp...

Embodiment 2

[0046] A ship propeller blade with piezoelectric damping, made of 120 parts by mass of piezoelectric damping composite material core and 120 parts by mass of T700 carbon fiber reinforced polyether ketone composite material prepreg cladding;

[0047] The core of the piezoelectric damping composite material is located at the root of the propeller blade, and is uniformly prepared by 8 parts by mass of lead zirconate piezoelectric ceramic powder, 0.05 parts by mass of acidified multi-walled carbon nanotubes, and 100 parts by mass of polyether ketone at 230 °C. After stirring for 45 minutes, it was poured into a mold and cooled to room temperature to be released from the mold.

[0048] After the piezoelectric damping composite material core is obtained, the 0.35m thick unidirectional T700 carbon fiber reinforced polyetherketone composite material prepreg is cut, and the blade side bevel angle is used as the reference angle, according to The layup sequence of the piezoelectric ...

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Abstract

The invention discloses a propeller blade with a piezoelectric damping function for a ship and a preparation method thereof. The propeller blade is prepared from, by mass, 80-120 parts of piezoelectric damping composite cores and 120-200 parts of fiber-reinforced thermoplastic composite prepreg coating layers; and the piezoelectric damping composite cores are prepared from, by mass, 5-8 parts of piezoelectric ceramic powder, 0.05-0.09 part of carbon nanotube and 100 parts of thermoplastic polymers which are heated, mixed, and then demoulded at the normal temperature. Through the co-curing forming process of the piezoelectric damping composite cores and the fiber-reinforced thermoplastic composite prepreg coating layers, the composite propeller has the piezoelectric damping function and excellent overall structure mechanical performance, the vibration-reducing and noise-reducing performance of the composite propeller can be remarkably improved, and the problem that due to the underwateradded mass inertia force effect, vibration noise of a stern flow field of an existing marine composite propeller is large can be effectively solved.

Description

technical field [0001] The invention relates to a propeller blade and a preparation method thereof, in particular to a propeller blade for ships with piezoelectric damping and a preparation method thereof. Background technique [0002] Compared with traditional metal propellers, composite propellers have the advantages of light weight, high specific strength, high specific stiffness, and seawater corrosion resistance. Therefore, the application of marine composite propellers is increasing. However, existing studies have found that due to the existence of underwater inertia, composite propeller blades increase their own additional mass by 6 times in underwater modal analysis. Since the natural frequency of the structure is inversely proportional to the mass, the low-order The frequency of the main mode drops significantly, which causes the composite propeller to easily generate underwater low-frequency resonance in the wake field, causing underwater vibration and noise proble...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B63H1/26C08L77/00C08K9/00C08K3/04C08K3/22B29C70/34B29C70/54B29L31/08
CPCB29C70/345B29C70/54B29L2031/087B63H1/26C08K3/041C08K3/22C08K9/00C08K2003/2234C08L77/00
Inventor 张鸿名李鑫王承鑫陈刚
Owner HARBIN INST OF TECH AT WEIHAI
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