https://communities.bentley.com/communities/other_communities/chinafirst/w/chinawiki/42619/iceen-USTelligent Community 12https://communities.bentley.com/communities/other_communities/chinafirst/w/chinawiki/42619/iceMon, 17 Jun 2019 07:44:33 GMT6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:1994d480-e7ab-4dad-9824-d77b244400a7Qiang Hehttps://communities.bentley.com/communities/other_communities/chinafirst/w/chinawiki/42619/ice#commentsCurrent Revision posted to 技术资料库 by Qiang He on 6/17/2019 7:44:33 AM<br /> <p>冰激振动疲劳分析是在动力响应程序中考虑的，这里主要就几个参数做介绍：</p> <p><img src="/resized-image/__size/320x240/__key/communityserver-wikis-components-files/00-00-00-04-10/pastedimage1560757359260v1.png" alt=" " /></p> <p>Breaking length ratio：</p> <p>在结构刚性假定条件下，该变量是相邻两个冰荷载线性增长起点之间的时长与冰荷载线性增长所需要的时长之比。</p> <p><img src="/resized-image/__size/320x240/__key/communityserver-wikis-components-files/00-00-00-04-10/pastedimage1560757378913v2.png" alt=" " /></p> <p><img src="/resized-image/__size/320x240/__key/communityserver-wikis-components-files/00-00-00-04-10/pastedimage1560757391182v3.png" alt=" " /></p> <p>Stiffness Parameter:</p> <p>默认值0.0315，是在冰排无限大假定条件下取值的。</p> <p>Number of Velocity Steps:</p> <p>有几个速度步，就会生成几个工况荷载，帮助中解释不正确。如果留空，则以输入速度值作为一个工况荷载。</p> <p>Duration of Ice Movement:</p> <p>这个值以小时为单位，并且表示一个观测期内，该工况出现的总时长。这里的一个观测期，指的是FTOPT中15-21列fatigue time period 设置中所输入的时长。最终由该工况再疲劳寿命期限内造成损伤的总的循环次数，为观测期内观测得到的循环次数，即FTLOAD中&lsquo;number of occurrences&rsquo;中设定的循环次数，乘以疲劳总寿命与观测期时长的比值。</p> <div style="clear:both;"></div>