Dynamic Effects of Embedded Macro-Fiber Composite Actuators on Ultra-Light Flexible Structures of Repeated Pattern- a Homogenization Approach

Abstract

Motivated by deployable satellite technology, this article presents a homogenization model of an inflatable, rigidized lattice structure with distributed macro-fiber composite (MFC) actuation. The model is based upon a general expression for the strain and kinetic energy of a fundamental repeated element of the structure. These expressions are reduced in order and expressed in terms of the strain and displacement components of an equivalent one-dimensional vibration model. The resulting model is used to analyze changes in the structural natural frequencies introduced by the local effects of the added macro-fiber composite actuators for several configurations. A finite element solution is used as a comparison for the homogenization model, and the two are shown to be in good agreement, although the latter requires significantly less computational effort.

Design and Vibration Isolation Performance of Truss‐Type CFRP Raft Frame

“…According to the numerical calculation model of composite damping in conjunction with the modal analysis results, the MATLAB program is written to calculate the damping loss factors of 12 CFRP circular tubes, and the damping ratio of each circular tube is calculated with the damping loss factors via formula (6), where the numbers 1-4 refer to the circular tubes in the x direction, 5-8 are the circular tubes in the y direction, and 9-12 are the circular tubes in the z direction; the results are shown in Table 1.…”

“…e truss-type floating raft has superior vibration isolation effect because of its unique periodic structure and complex internal energy transmission mechanism [1]. Scholars have carried out a lot of researches to improve the vibration isolation performance of the floating raft frame to study the vibration isolation performance of the raft frame structure by changing the geometric size and number of the subelements of raft frame structure [2][3][4][5][6], to design the new form of the raft frame structure to reduce vibration [7][8][9], and to study the damping of the raft frame structure hoping to obtain good vibration isolation performance [10][11][12][13][14][15]. Compared with traditional metal materials, carbon fiberreinforced composites have such advantages as large specific strength, high specific modulus, high damping, and strong designability [13,[16][17][18].…”