ABSTRACT
In ride comfort research, it is important to simulate the vibration of automobile on uneven road. To build a more accurately model, the nonlinear factors should be taken into consideration. In this paper, an uneven road with certain auto-PSD is generated in MATLAB software.In ADAMS software, a 126-DOF nonlinear ride comfort model is constructed and simulated on this irregular road. The results of simulation are converted into frequency domain, and compared with those of road tests. This method of ride comfort research is proved to be reliable and feasible.
INTRODUCTION
Ride comfort is one of the most important performances of vehicles. Simulation is a useful way for ride comfort research. When a vehicle is running on an uneven road, it will vibrate due to the irregularity of road. The transference of this vibration through suspension, body and seat to the human body is often studied in frequency domain according to the assumption that the vehicle is linear system. Given the road PSD (Power Spectral Density) and the transfer function matrix of the N degree of freedom model of linear vehicle system, the PSD and main square root of the response can be worked out by random vibratio


摘要
在乘坐舒適性的研究中，做汽車在不平路面的振動(dòng)仿真是非常必要的。為了建一個(gè)更加接近實(shí)際情況的仿真，必須考慮到非線性因素。在這片論文里先在MATALAB軟件中已經(jīng)建立了確定功率譜密度的不平陸面模型。在ADAMS軟件中建立126自由度的研究乘坐舒適性的非線性汽車模型并在已建好的路面模型中仿真，仿真結(jié)果轉(zhuǎn)化為頻域并與路面測試的結(jié)果對比。這種研究乘坐舒適性的方法被證明是可行的。
緒論
乘坐舒適性是汽車最重要的性能之一。而乘坐舒適性研究的有效方法就是仿真。當(dāng)汽車在不平路面上行駛時(shí)，會(huì)因?yàn)槁访娴陌纪苟駝?dòng)。我們通常假設(shè)汽車是一個(gè)線性系統(tǒng)，在頻域內(nèi)研究振動(dòng)通過懸架、車身、座椅向人體的傳動(dòng)。鑒于路面的功率譜密度和多自由度線性車輛