Relativity and Aeroelasticity Effects on the Supersonic Objects

摘要

Flutter is one of the aerodynamic problems; it mainly occurs on the moving object, especially with wide wings, blade or aerospace vehicles when they cruise at ultra-high speeds. Development and applications of flutter and its related issues in usual speed such as structural design, material section and aerodynamic frame study by many authors like Baurmgart, Jureczko, Guo, Baxevanou and Larsen (see ref. [1-5]). But at ultra-high speeds where the Galilean space and time invariant change to the Lorentz spacetime invariant, the flutter phenomenon will be important to describe the stability of the moving objects at ultra-high speeds. In this limit the torsional stiffness of the wings or the body of the object is very large, so the self-variation causes the instability motion on aerospace-crafts. Therefore, the moving body displacement against the flow field plays an important role in dynamic stability studies. It is the main source of instability in an ultrasonic airplane, which is subjected to aerodynamic forces and velocity of a moving object. Instability and self-oscillation are one of the important reasons of studying the characteristics of an airplane and velocity conditions at the ultra-high speeds, which we can see the relativistic effect of motion, as predicated many years ago by Einstein's theory, i.e. the general theory of relativity. Nowadays, prediction of flutter in the field of aerospace science plays a fundamental role because the aviation safety of ultra-high objects in military and high technology equipment growth day by day. In this article in order to determine the aeroelasticity effects of ultrasonic aerospace-crafts, the theoretical methods based upon physical characteristics of four dimensional spacetime at high velocity (relativity theory) were selected.