tailieunhanh - SHOCK SPECTRUM CALCULATION FROM ACCELERATION TIME HISTORIES

The Naval Facilities Engineering Command seeks to expand the technology base upon which future shore facilities are founded. An important area in which a new design approach is being developed is in the management and understanding of those characteristics of earthquake and explosively generated foundation motions that damage or destroy Naval equipment. This report is a part of the design method development. Specifically, it documents and offers a new method of shock and response spectrum computation. The new method is more accurate than any known to be in use, it runs on a computer with less computer time than other procedures with similar sophistication, and the theory is more. | LEVEK I F TN no. N-1590 title SH0CK SPECTRUM CALCULATION FROM uu ACCELERATION TIME HISTORIES DTIC author I H. A. Gaberson date September 1980 sponsor Naval Facilities Engineering Command program nos CIVIL ENGINEERING LABORATORY NAVAL CONSTRUCTION BATTALION CENTER Port Hueneme California 93043 Approved for public release distribution unlimited. 81 2 31 027 u - Unclassified HCURlTY CLARIFICATION o r. I 5 T Huilltk REPORT DOCUMENTATION PAGE TN-1590 I. GOVT Accession MO. DN04406 READ INSTRUCTIONS BEFORE COMPLETING FORM i RtClRlCHT-t CATALOG HUMRIR KWnii July 1976-May 1978 AIAAOAUIHO ORO R1RORT HUMteR RCftlOO COvCRCO fiOCK SPECTRUM CALCULATION FROM ACCELERATION JflME yiSTORlES MjTWOftpJ H. A-jpjaberson F I. PtRrORMIHG ORGANIZATION NAUf AHO AOORetl CIVIL ENGINEERING LABORATORY Naval Construction Battalion Center Port Huenemc California 95043_____________ II. CONTROLLING orrice NAM ANO AOORC11 Naval Facilities Engineering Command Alexandria Virginia 22332 li MONITORING AỎÉHCV NAMC AOORCSV Iran Conlrolllnf oinri 0 PROGRAMCLeMtHTRROjecT. TASK VF5ft3ffi 6 66 Unclassified ĨÕHÌÓŨŨÌ OIITRIGUTION STATtMtHT rot A R e i Approved for public release distribution unlimited. Shock spectrum response spectrum data analysis shock design shock mechanics hardening earthquakes. The report mainly discusses compares and derives one new and improved and two popular shock spectrum computation methods The new one is a single recursive equation method that approximates the acceleration as a straight line between the digitized values. The new method is easily derived without recourse to z Transform theory and thus should contribi ce to improved understanding of the computations. A new source of low frequency continued DO 1473 aoiTioH or NOV It OGtOLtTG Unclassified i Ị u 2 ỳ J Unclassified HLURlTv Cl AIIIFlC AtlQN OF Twit FAQKfW w D 20. Continued error common to all of the calculation methods was found and empirical testing of the coefficients was used to .