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首页> 外文会议>2002 ASME International Mechanical Engineering Congress and Exposition , Nov 17-22, 2002, New Orleans, Louisiana >MICROS-SIGNALS AND MODAL POTENTIALS OF NONLINEAR DEEP AND SHALLOW CONICAL SHELLS
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MICROS-SIGNALS AND MODAL POTENTIALS OF NONLINEAR DEEP AND SHALLOW CONICAL SHELLS

机译：非线性深和浅锥壳的微信号和模态势

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摘要

Conventional sensors, such as proximeters and accelerometers, are add-on devices usually adding additional weights to structures and machines. Health monitoring of flexible structures by electroactive smart materials has been investigated over the years. Thin-film piezoelectric material, e.g., polyvinylidene fluoride (PVDF) polymeric material, is a lightweight and dynamic sensitive material appearing to be a perfect candidate in monitoring structure's dynamic state and health status of flexible shell structures with complex geometries. The complexity of shell structures has thwarted the progress in studying the distributed sensing of shell structures. Linear distributed sensing of various structures have been studied, like beam, plate, cylindrical shell, conical shell, spherical shell, paraboloidal shell and toroidal shell. However, distributed sensing control of nonlinear shell structures has not been carried out rigorously. This study is to present the microscopic signals, modal voltages and distributed micro-sensing components of truncated nonlinear conical shells laminated with distributed infinitesimal piezoelectric neurons. Signal generation of distributed neuron sensors laminated on conical shells is defined first. The dynamic signal of truncated nonlinear conical shell consists of microscopic linear and nonlinear membrane strain components and linear bending strain component based on the von Karman geometric nonlinearity. Micro-signals, modal voltages and distributed sensing components of two different truncated nonlinear conical shells are investigated and their sensitivities discussed.
机译：传统的传感器（例如，近程传感器和加速度计）是附加设备，通常会给结构和机器增加额外的重量。多年来，已经研究了通过电活性智能材料对柔性结构进行健康监控。薄膜压电材料，例如聚偏二氟乙烯（PVDF）聚合材料，是一种轻质且动态敏感的材料，似乎是监测具有复杂几何形状的柔性壳结构的结构动态状态和健康状况的理想选择。壳结构的复杂性阻碍了壳结构的分布式传感研究的进展。研究了各种结构的线性分布传感，例如梁，板，圆柱壳，圆锥壳，球形壳，抛物面壳和环形壳。但是，尚未严格执行非线性壳结构的分布式传感控制。这项研究是要提出的微观信号，模态电压和分布式微传感组件被截断的非线性圆锥壳与分布的无穷小压电神经元层压。首先定义分布在圆锥形外壳上的分布式神经元传感器的信号生成。截断的非线性圆锥壳的动态信号由微观线性和非线性膜应变分量以及基于von Karman几何非线性的线性弯曲应变分量组成。研究了两种截短的非线性圆锥壳的微信号，模态电压和分布式感测分量，并讨论了其灵敏度。

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