软路面原始谱及其转化理论的试验验证研究

Research on Experimental Verification of Soft-Terrain Initial Spectrum and Its Transformation Theory

由软路面谱的转化理论,计算出拖拉机从动轮和驱动轮下的有效谱。根据两轮驱动拖拉机前后轮有效谱的不同,建立了拖拉机在软路面上行驶时四轮输入的激励谱矩阵。通过路面不平度的标杆测量法和拖拉机在软路面激励下的动态响应分析,验证了软路面原始谱测量的结果及其转化理论的正确性。

On the basis of the proposed transformation theory of soft-terrain spectrum, effective spectra under the driving and driven wheels of Changchun - 40 tractor are predicted. According to difference of effective soft-terrain spectra of front and rear wheels of a two-wheel drive tractor, an excitation spectrum matrix of four-wheel input is established when tractor moves on soft-terrain. Correctness of the results measured by the measuring gauge of soft-terrain initial pectrum and the proposed transformation theory is verified through surveyor' s pole measurement method of terrain roughness and dynamic response analysis of the tractor excited by soft-terrrain.