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首页> 外文期刊>Aerospace >Numerical and Experimental Investigation of the Design of a Piezoelectric De-Icing System for Small Rotorcraft Part 3/3: Numerical Model and Experimental Validation of Vibration-Based De-Icing of a Flat Plate Structure
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Numerical and Experimental Investigation of the Design of a Piezoelectric De-Icing System for Small Rotorcraft Part 3/3: Numerical Model and Experimental Validation of Vibration-Based De-Icing of a Flat Plate Structure

机译：小型旋翼飞机第3/3部分压电去冰系统设计的数值和实验研究：数值模型及实验验证平板结构的振动脱落

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摘要

The objective of this research project is divided in four parts: (1) to design a piezoelectric actuator-based de-icing system integrated to a flat plate experimental setup and develop a numerical model of the system with experimental validation, (2) use the experimental setup to investigate actuator activation with frequency sweeps and transient vibration analysis, (3) add an ice layer to the numerical model and predict numerically stresses at ice breaking with experimental validation, and (4) bring the concept to a blade structure for wind tunnel testing. This paper presents the third part of the investigation in which an ice layer is added to the numerical model. Five accelerometers are installed on the flat plate to measure acceleration. Validation of the vibration amplitude predicted by the model is performed experimentally and the stresses calculated by the numerical model at cracking and delamination of the ice layer are determined. A stress limit criteria is then defined from those values for both normal stress at cracking and shear stress at delamination. As a proof of concept, the numerical model is then used to find resonant modes susceptible to generating cracking or delamination of the ice layer within the voltage limit of the piezoelectric actuators. The model also predicts a voltage range within which the ice breaking occurs. The experimental setup is used to validate positively the prediction of the numerical model.
机译：本研究项目的目的分为四部分：（1）设计了集成的压电执行器的脱冰系统集成到平板实验设置，并使用实验验证开发系统的数值模型，（2）使用实验设置以调查频率扫描和瞬态振动分析的执行器激活，（3）将冰层添加到数值模型中，并预测实验验证的冰碎冰中的数值应力，（4）将概念带入风洞的刀片结构测试。本文介绍了调查的第三部分，其中将冰层添加到数值模型中。在平板上安装了五个加速度计以测量加速度。确定模型预测的振动幅度的验证，并确定由冰层的裂化和分层时计算的数值模型计算的应力。然后将压力极限标准从分层裂解和剪切应力下的正常应力的那些值定义。作为概念证据，然后使用数值模型来寻找易受在压电致动器的电压极限内产生冰层的裂缝或分层的谐振模式。该模型还预测了发生冰破碎的电压范围。实验设置用于积极验证数值模型的预测。

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