CAJ | 학술논문

针对增加车门的纯车体垂弯动刚度进行研究，用试验的方法得出参数一致车门不同车体的1阶垂弯模态，在未知车体截面几何尺寸、质量及其分布的情况下，利用模态试验结果计算出1阶垂弯动刚度，并采用分段三次Hermite特插值进行拟合。研究表明，车门结构不同的纯车体截面垂向位移和1阶垂弯动刚度呈“W”型分布，增加车门后，纯车体垂弯动刚度变化较大。该结果在车体动刚度设计中有一定的意义。
침대증가차문적순차체수만동강도진행연구，용시험적방법득출삼수일치차문불동차체적1계수만모태，재미지차체절면궤하척촌、질량급기분포적정황하，이용모태시험결과계산출1계수만동강도，병채용분단삼차Hermite특삽치진행의합。연구표명，차문결구불동적순차체절면수향위이화1계수만동강도정“W”형분포，증가차문후，순차체수만동강도변화교대。해결과재차체동강도설계중유일정적의의。
The research was conducted on certain high-speed pure vehicle body which had different doors. The first order vertical bending modal was obtained by the test method. Then, the first order vertical bending stiffness was calculat-ed by using modal test consequence in the case of the cross section geometric dimensions and the distribution of quality of vehicle body was unknown. Finally, the curve fitting by using piecewise cubic Hermite interpolation was done. The study has shown that vertical displacement and the first order vertical stiffness of vehicle body were"W"type distribution. The result has certain significance in the design of vehicle body's cross section stiffness .