航天器环境工程
航天器環境工程
항천기배경공정
Spacecraft Environment Engineering
2015年
5期
532-536
,共5页
模拟公路运输%随机振动试验%试验谱
模擬公路運輸%隨機振動試驗%試驗譜
모의공로운수%수궤진동시험%시험보
simulated road transportation%random vibration test%test spectrum
文章介绍了国内外相关标准中推荐的模拟公路运输的随机振动试验谱.针对实测数据,利用正态容差极限法通过包络处理的基本步骤制定模拟运输试验谱.并根据多体动力学仿真结果提出了一种根据车速、道路等级变化对包络谱进行调整的方法.在制定模拟公路运输的随机振动试验谱时,应当优先选择利用跑车试验数据制定的试验谱,其次选择类似产品的试验谱并适当调整.在不具备以上两种条件的情况下,再选择国内外相关标准中推荐的试验谱.
文章介紹瞭國內外相關標準中推薦的模擬公路運輸的隨機振動試驗譜.針對實測數據,利用正態容差極限法通過包絡處理的基本步驟製定模擬運輸試驗譜.併根據多體動力學倣真結果提齣瞭一種根據車速、道路等級變化對包絡譜進行調整的方法.在製定模擬公路運輸的隨機振動試驗譜時,應噹優先選擇利用跑車試驗數據製定的試驗譜,其次選擇類似產品的試驗譜併適噹調整.在不具備以上兩種條件的情況下,再選擇國內外相關標準中推薦的試驗譜.
문장개소료국내외상관표준중추천적모의공로운수적수궤진동시험보.침대실측수거,이용정태용차겁한법통과포락처리적기본보취제정모의운수시험보.병근거다체동역학방진결과제출료일충근거차속、도로등급변화대포락보진행조정적방법.재제정모의공로운수적수궤진동시험보시,응당우선선택이용포차시험수거제정적시험보,기차선택유사산품적시험보병괄당조정.재불구비이상량충조건적정황하,재선택국내외상관표준중추천적시험보.
Three main sources of random vibration test spectra for simulated road transportation tests are discussed in this paper, including the recommended test spectra in the international general standards, and in the Chinese national, military and aerospace standards. The Normal Tolerance Limitation method is used to establish the simulated road transportation test spectrum for the field test data, and with a basic procedure to build an envelope. A PSD envelope adjustment method is proposed for the multibody dynamic simulation according to the speed of the vehicle and the road grade. It is indicated that in conducting the simulated road transportation test, the test spectrum from the field test data should be used first, then the adjusted PSD envelope is chosen from similar products. If both these sources are not available, the test spectra from the relevant standards can be adopted.