Optimizing elastic potential energy via geometric nonlinear stiffness

被引：46
作者：
Gatti, Gianluca [1 ]
机构：
[1] Univ Calabria, Dept Mech Energy & Management Engn, VP Bucci 46C, I-87036 Arcavacata Di Rende, CS, Italy
来源：
COMMUNICATIONS IN NONLINEAR SCIENCE AND NUMERICAL SIMULATION | 2021年 / 103卷
关键词：
Nonlinear spring; Softening spring; Quasi-zero stiffness; Negative stiffness; Shock isolator; Nonlinear isolator; Ballistic impact; Catapult; STORAGE; SYSTEM;
D O I：
10.1016/j.cnsns.2021.106035
中图分类号：
O29 [应用数学];
学科分类号：
070104 ;
摘要：
In this paper, it is shown how a nonlinear elastic mechanical system can be exploited to increase the elastic potential energy compared to its linear counterpart. A strategy for optimizing the system parameters is proposed, and performance is compared considering equal maximum displacement and maximum force. A theoretical insight is presented, and some asymptotic trends for optimum parameters selection are derived in closed-form and highlighted to help the design. A specific nonlinear mechanical system is considered, but the overall approach can be generalized. The actual system consists of a set of linear springs arranged to achieve geometric nonlinearity, and its configuration is selected based on a practical realization. A prototype device is finally assembled and tested to show evidence of the theoretical discussion. (C) 2021 Elsevier B.V. All rights reserved.
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页数：18
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