CAJ | 학술논문

为了精确描述柔性铰链力学性能，提出一种通用的基于有限元法的力学模型，并基于该模型分析其静态和动态性能．柔性铰链采用欧拉-伯努利梁模拟其力学行为，将其划分为3个三自由度的结点、2个变截面单元．采用最小势能原理建立与柔性铰链结构参数相关的封闭形式刚度矩阵，采用拉格郎日方程建立铰链的质量矩阵和动力学方程．为了验证所推导的力学模型的精确性，与 ANSYS分析结果进行比较分析，两者的结果差值在1.1％～5.6％范围之内，说明理论模型与ANSYS分析结果吻合，所建立的模型能精确反映其静态和动态性能．基于柔性铰链有限元模型，可精确分析铰链参数与其精度和固有频率的关系、应力分布和频率响应，为正圆型柔性铰链应用于柔顺机构设计提供了一种精确的力学模型．
위료정학묘술유성교련역학성능，제출일충통용적기우유한원법적역학모형，병기우해모형분석기정태화동태성능．유성교련채용구랍-백노리량모의기역학행위，장기화분위3개삼자유도적결점、2개변절면단원．채용최소세능원리건립여유성교련결구삼수상관적봉폐형식강도구진，채용랍격랑일방정건립교련적질량구진화동역학방정．위료험증소추도적역학모형적정학성，여 ANSYS분석결과진행비교분석，량자적결과차치재1.1％～5.6％범위지내，설명이론모형여ANSYS분석결과문합，소건립적모형능정학반영기정태화동태성능．기우유성교련유한원모형，가정학분석교련삼수여기정도화고유빈솔적관계、응력분포화빈솔향응，위정원형유성교련응용우유순궤구설계제공료일충정학적역학모형．
In order to accurately describe the mechanical properties of a flexure hinge ,a general mechanical model based on finite element method is proposed ,and the static and dynamic per-formance analysis is carried out according to the propose model .Euler-Bernoulli beam was adopt-ed to simulate the mechanical behavior of the flexure hinge ,and it was divided into three nodes with three degrees of freedom and two elements with variable cross-section .A closed stiffness matrix related to the structural parameters of the flexure hinge was established by using the prin-ciple of minimizing potential energy ,and the mass matrix and dynamics equations were built by employing Lagrange equation .In order to validate the precision of the proposed mechanical mod-el ,the analysis results by ANSYS was compared and got the difference range from 1 .1% to 5.6% ,which showed that the theoretical model was close to ANSYS and the proposed model could accurately illustrate the static and dynamic properties .The finite element model of the flex-ure hinge can be applied accurately to analyze the relationship between its accuracy and natural frequency and structural parameters ,stress distributions and frequency response .Therefore ,a precise mechanical model of the circular flexure hinge is provided for the design of compliant mechanisms .