The Static And Dynamic Characteristics Of Intelligent Piezoelectric Device Under Hypergravity

In the case of aerospace,fighter aircraft driving,etc.,astronauts and pilots are required to withstand a maximum of 8.9G of gravity.The inertial force brought about by hypergravity has different degrees of influence on the organs,tissues and body fluids of the human body.Longitudinal hypergravity can cause insufficient blood supply to the brain,leading to visual changes and even loss of consciousness.Real.time monitoring of the physiological signals of people in the hypergravity field helps to detect hidden dangers in time and prevent accidents.Due to its force.electric coupling characteristics,piezoelectric materials can not only collect energy from environmental vibration,but also can be used as a sensor to convert mechanical signals into electrical signals,which is suitable as a functional material for self.powered miniature sensors.The intelligent piezoelectric device has high electrical performance and good mechanical deformation ability.Because Its agreeableness to biological tissue,small volume and high sensitivity,it is suitable for monitoring physiological signals.In the hypergravity field,the static and dynamic characteristics of intelligent piezoelectric devices are the topics of interest in this paper.This paper studies the effects of the hypergravity field from two aspects.First,the boundary element method is used to calculate the two.dimensional problems of piezoelectric materials considering the body force brought about by hypergravity.Next,a skin.device composite beam model and a composite beam model placed on the Winkler foundation are proposed to study the natural vibration characteristics of the device considering geometric nonlinearity.Finally,based on the composite beam model on the Winkler foundation,the response of the nonlinear forced vibration is studied.The results provide theoretical guidance for designing flexible piezoelectric devices using in hypergravity fields.