新型钢铅组合耗能器性能试验及参数优选

为了考察新型钢铅组合耗能器(NCSLD)的力学性能和提高其耗能能力,利用电液伺服压剪试验机对NCSLD耗能器进行力学性能试验,采用ANSYS实体建模的方法对耗能器进行大量的数值分析,并对性能试验和数值分析的结果进行对比,研究耗能器的滞回特征参数与其6个几何参数之间的关系,回归出二者之间的公式.提出评价耗能器性能优劣的标准及其附加条件,并以此标准为依据,利用均匀设计法和遗传算法分别对耗能器的6个几何参数进行优选.结果表明遗传算法的选优效果要好于均匀设计法,同时得到一系列性能良好的NCSLD耗能器.

Performance tests and parameter optimizing of new combined steel lead damper

In this paper, electro-hydraulic servo press-shear machine is used for the performance tests of the new combined steel lead damper (NCSLD), ANSYS entity modeling method is used for massive numerical analyses of NCSLD damper, comparative analyses between performance tests and numerical analyses are carried out, the relation between hysteretic characteristic parameters of NCSLD damper and its six geometric parameters are studied, and then, the formulae between them are regressed. Criterion and its additional condition which evaluates the performance of the damper are put forward. Uniform design method and genetic algorithm are used to optimize the six geometric parameters of NCSLD damper according to the criterion; the result of optimization indicates that the outcome of the genetic algorithm is better than the uniform design method, and a series of NCSLD dampers of good performance gained.